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Earth of fire

Actualité volcanique, Articles de fond sur étude de volcan, tectonique, récits et photos de voyage

volcanic activity

Publié le par Bernard Duyck
Publié dans : #volcanic activity
Merapi - Avalanche pyroclastic flow on 02.02.2022 / 4 p.m. - PVMBG

Merapi - Avalanche pyroclastic flow on 02.02.2022 / 4 p.m. - PVMBG

Pyroclastic avalanche flows were recorded at Merapi on February 2, 2022 at 3:58 p.m. WIB; the trace on the seismogram has an amplitude of 13 mm and a duration of 129 seconds. The glide distance is 2,000 m towards the Bebeng River (southwest).

Merapi - seismicity on 02.02.2022 - Doc. BPPTKG

Merapi - seismicity on 02.02.2022 - Doc. BPPTKG

The BPPTKG reports more than 140 avalanche earthquakes, 137 hybrid earthquakes, 8 blast / emission earthquakes, 25 volcanic earthquakes, 4 tectonic earthquakes.

The Merapi remains in activity level 3 / siaga since November 5, 2020

 

Source: BPPTKG, PVMBG, Magma Indonesia

Lascar - image Sentinel-2 bands 12,11,8A from 02.02.2022 / 2:37 p.m. - via Mounts Project

Lascar - image Sentinel-2 bands 12,11,8A from 02.02.2022 / 2:37 p.m. - via Mounts Project

SERNAGEOMIN reported minor increases in surface activity at Láscar.

The nocturnal incandescence of the crater began to be visible at least since January 11. A total of 14 thermal anomalies were identified in satellite data from January 13-28; anomaly intensity increased on January 17 and peaked on January 22.

Lascar - thermal anomalies on 02.02.2022 / 2:49 p.m. - Sentinel-2 bands 12,11,8A & Modis thermal volcanic activity - Doc.Mirova

Lascar - thermal anomalies on 02.02.2022 / 2:49 p.m. - Sentinel-2 bands 12,11,8A & Modis thermal volcanic activity - Doc.Mirova

Gas and steam emissions were more frequent and robust compared to previous months, with the highest plume rising more than 1 km above the crater rim on January 22. Sulfur dioxide emissions were identified in satellite data on January 8 and 17; instruments at the EMU station, 6 km ESE, recorded increased emission rates from 17 to 19 January with an average peak of 1,787 tonnes per day on 18 January.

Seismicity was at normal levels throughout January 12-28. Low numbers and magnitudes of volcano-tectonic (VT) and long-period (LP) earthquakes were recorded by the seismic network, although 27 low-magnitude (M 1 or less) VT events were recorded on January 22 . Satellite images acquired on January 26 showed no recent morphological changes at the crater or deposits around the crater area.

The alert level remained at green (the lowest level on a four-color scale).

 

Sources: Sernageomin & Global Volcanism program

Galapagos / Wolf - thermal anomalies as of 02.02.2022 / 7:50 p.m. - Doc. Mirova _MODIS_Latest10NTI

Galapagos / Wolf - thermal anomalies as of 02.02.2022 / 7:50 p.m. - Doc. Mirova _MODIS_Latest10NTI

MIROVA recorded 3 very high thermal anomalies (6005 MW, 3392 MW and 1532 MW) and 1 moderate, while FIRMS recorded more than a hundred thermal anomalies at Wolf Volcano, on Isabela Island in the Galapagos, during of the last 24 hours.These anomalies are related to lava flows to the south.


Long period (LP) earthquake :  1
Alert level - SNGRE: Orange

 

Sources: IGEPN & Mirova

Myrdalsjokull - Katla - photo RUV 29.07.2021

Myrdalsjokull - Katla - photo RUV 29.07.2021

At 19:10 UTC on February 02, 2022, a strong earthquake swarm started at Katla volcano, below Myrdalsjökull in Iceland. The strongest earthquakes to date had a magnitude of Mw4.0 (19:10 UTC) and Mw3.4 (19:44 UTC).

To monitor.

 

Source: Icelandic Met Office

Myrdalsjökull - Katla - seismicity on 03.02.2022 / 07:10 - Doc. IMO
Myrdalsjökull - Katla - seismicity on 03.02.2022 / 07:10 - Doc. IMO
Myrdalsjökull - Katla - seismicity on 03.02.2022 / 07:10 - Doc. IMO

Myrdalsjökull - Katla - seismicity on 03.02.2022 / 07:10 - Doc. IMO

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
La Palma / Cumbre Vieja - eruptive fissure on 30.01.2022 - photo Piergiorgio - click to enlarge

La Palma / Cumbre Vieja - eruptive fissure on 30.01.2022 - photo Piergiorgio - click to enlarge

During the last 7 days, since the last communication (the 25th at 9:00 UTC), 103 earthquakes have been located on the island of La Palma.
The magnitudes are between 0.4 and 2.2 (mbLg). Four of these earthquakes were felt weakly by the population with intensity II (EMS98). The location of the hypocenters continues under the central area of ​​Cumbre Vieja in the same areas as the previous days, at depths between 0 and 18 km. Three earthquakes with depths between 21 and 37 km were located in this period.

La Palma - seismicity of the last 7 days to 01.02.2022 - Doc. IGN

La Palma - seismicity of the last 7 days to 01.02.2022 - Doc. IGN

The network of permanent GNSS stations on the island does not show significant deformations that could be associated with volcanic activity.

The height of the cone is measured, obtaining a value of 1,120 m. On sea level.
Sampling of fumarolic gases in the crater of the main building is continuing, as well as the maintenance of the geochemical instrumentation deployed near it to monitor the post-eruptive stage in detail.

The traffic semaphore at volcanic risk on the island of La Palma passed this February 1 from red to yellow.

 

A new episode of violent Sahara dust storm engulfed the skies of the Canary Islands and Madeira.

AEMET Spain issued a health alert on January 30. Health authorities have advised people not to stay outdoors for long periods of time.

 

Sources: IGN, IGME, AEMET

Canaries - after the ashes of the volcano, the sand of the Sahara engulfed the archipelago - image Sentinel-3 Copernicus 30.01.2022 - click to enlarge

Canaries - after the ashes of the volcano, the sand of the Sahara engulfed the archipelago - image Sentinel-3 Copernicus 30.01.2022 - click to enlarge

At Santiaguito, seismic stations and observer reports record prolonged periods of degassing 200 - 800 meters above the crater, which is moving northeast.

During the night and early in the morning, weak to moderate avalanches were generated which mainly affected the southwestern and western flanks. This causes fine ash particles to fall into the volcanic perimeter and some of these remain suspended in the air.

Explosions can be generated that increase the number and size of avalanches and audible sounds several kilometers from the volcanic edifice. Due to the permanent extrusion of boulder lava into the dome of Caliente Dome, in a west-southwest direction and the instability of the accumulated material, the occurrence of more boulder and ash avalanches is not not excluded, as well as possible distributing pyroclastic flows in different directions.

 

Sources: Insivumeh & Conred

Santiaguito - degassing on 01.02.2022 / 1:42 p.m. - Doc. Insivumeh

Santiaguito - degassing on 01.02.2022 / 1:42 p.m. - Doc. Insivumeh

The month of January 2022 will have been marked by the continuation and the end of the eruption at Piton de la Fournaise, which began on December 22. Throughout the eruption which ended on January 17, a deflation of the summit area was observed, and from January 7 an increase in seismicity was recorded; both witnesses to the emptying of the magma reservoir located about 2 km below the summit.

Since the end of the eruption, residual seismicity has been observed, and summit inflation seems to be resuming at a low rate.

 

Source / OVPF

Piton de La Fournaise - Illustration of the deformation over 1 year. Here are shown baselines (variation of distance between two GPS receivers) crossing the Piton de la Fournaise building, at the top (top), at the base of the terminal cone (in the middle) and in the far field (bottom ) (see location on the associated maps). An increase is synonymous with elongation and therefore swelling of the volcano; conversely a decrease is synonymous with contraction and therefore deflation of the volcano. Any periods colored in light pink correspond to eruptions. - Doc. OVPF

Piton de La Fournaise - Illustration of the deformation over 1 year. Here are shown baselines (variation of distance between two GPS receivers) crossing the Piton de la Fournaise building, at the top (top), at the base of the terminal cone (in the middle) and in the far field (bottom ) (see location on the associated maps). An increase is synonymous with elongation and therefore swelling of the volcano; conversely a decrease is synonymous with contraction and therefore deflation of the volcano. Any periods colored in light pink correspond to eruptions. - Doc. OVPF

At Vulcano, the week of January 24 to 30, 2022 is characterized by:

Temperatures recorded on the rim of the crater which show a strong variability linked to atmospheric phenomena, while on the internal side they remain stable.
The CO2 flux in the crater area remains at high values. CO2 fluxes at the base of the La Fossa cone and in the Vulcano Porto area remain at medium-high values ​​except for the Faraglione site, where close values ​​are recorded in the background.
The SO flux in the crater area remains at a high level.
Geochemistry of thermal aquifers: the physico-chemical parameters recorded in Camping Sicilia e Les Bambara remain stable.
Local seismicity: Number of weak microshocks, decreasing VLP.
Regional seismicity: Regional seismicity essentially absent.
The GNSS monitoring network and the clinometric network did not show any significant changes in deformation compared to the previous week.
.
Source: INGV – Weekly bulletin 01/02/2022

Vulcano - interferogram (2022-01-17 - 2022-01-29), descending (124) - Sentinel-1 InSAR image - Via Mounts ptroject

Vulcano - interferogram (2022-01-17 - 2022-01-29), descending (124) - Sentinel-1 InSAR image - Via Mounts ptroject

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
The Chikurachi volcano - photo Alex. Belousov / KVERT

The Chikurachi volcano - photo Alex. Belousov / KVERT

A strong plume of gas and steam, containing certain amounts of ash, was reported by KVERT on January 31, 2022 at 02:00 UTC in Chikurachki, in the northern Kuriles. It extends 75 km to the southwest of the volcano, at an altitude of 4,500-5,000 meters. This activity continues. Ash explosions that can exceed 6,000 meters asl. can occur at any time and affect aviation.

Aviation color code changed from green to orange.

The last activity of the Chikurachki is dated from July 27 to August 18, 2016 (GVP).

Chikurachki, the tallest volcano on the island of Paramushir in the northern Kuriles, is actually a relatively small cone built on top of a tall Pleistocene volcanic edifice. The basaltic to oxidized andesitic scoria deposits covering the upper part of the young cone give it a characteristic red color. Frequent Plinian basaltic eruptions occurred during the Holocene. Lava flows 1781 m high Chikurachki reached the sea and formed capes on the northwest coast
 

Sources: KVERT, VAAC Tokyo & Global Volcanism Program

Chikurachki - Volcanic ash advisory at 31.01.2022 / 0713Z - VAAC Tokyo

Chikurachki - Volcanic ash advisory at 31.01.2022 / 0713Z - VAAC Tokyo

Chikurachki, on Paramushir Island SW of the tip of the Kamchatka Peninsula - Nasa Worlview Eodis 2016 image

Chikurachki, on Paramushir Island SW of the tip of the Kamchatka Peninsula - Nasa Worlview Eodis 2016 image

The National Institute of Geophysics and Volcanology, Etneo Observatory, reports that weak Strombolian activity continues at Etna's southeast crater. This activity produces light and discontinuous ash emissions which disperse rapidly in the atmosphere.
The amplitude of the tremor is almost stationary and reaches average values. The sources are located SE of the Southeast Crater at a level of about 3000 m. altitude
Infrasound activity is generally weak.
The stations of the ground deformation monitoring networks (GPS and tilt) operating on the volcano do not show significant variations.

 

Source: INGV OE 31.01.2022 – 12:59 p.m.

Etna SEC - 31.01.2022 / 10:57 am - webcam2 LAVE

Etna SEC - 31.01.2022 / 10:57 am - webcam2 LAVE

Etna SEC - ash emission on 31.01.2022 / 12:10 p.m. - INGV webcam

Etna SEC - ash emission on 31.01.2022 / 12:10 p.m. - INGV webcam

The week of January 24 to 30, 2022 is characterized in Sabancaya by moderate eruptive activity, with an average of 28 explosions per day, accompanied by plumes of ash and gas reaching 2,500 meters above the summit.

During this period, the IGP detected 275 earthquakes of volcanic origin, associated with the circulation of internal magmatic fluids. The VT earthquakes, in connection with the fracturing of rocks, remain localized to the west of the volcano, of magnitude up to M2.9. No significant deformation anomalies.

The volcanic alert remains at naranja, coupled with an inaccessible zone of 12 km radius around the crater.

 

Source: I.G.Peru

Sabancaya - activity report between 24 and 30.01.2022 / I.G.Peru

Sabancaya - activity report between 24 and 30.01.2022 / I.G.Peru

Using satellite imagery and sophisticated GPS instruments, geophysicists at the Cascades Volcano Observatory have detected a subtle increase in the rate of ground surface uplift approximately 5 km west of South Sister Volcano , Oregon.

The uplift is attributed to small pulses of magma accumulating about 7 km below the ground surface. Although any magmatic intrusion could eventually lead to a volcanic eruption, an eruption would likely be preceded by detectable and more vigorous earthquakes, ground movement (deformation), and geochemical changes.

Comparison of vertical GPS motion measured at station HUSB - USGS


None of these signs are presently detected. The alert level and the color code of the volcano remain at NORMAL / GREEN.

 

Source: CVO

Three Sisters, Oregon - radar interferogram 19.06.2020 - 13.08.2021 - Doc. USGS

Three Sisters, Oregon - radar interferogram 19.06.2020 - 13.08.2021 - Doc. USGS

South Sister, Oregon – USGS photo

South Sister, Oregon – USGS photo

USGS geologist Dan Dzurisin is near Sisters, central Oregon, setting up portable GPS monitoring equipment to track something that's been going on for 25 years and is still happening today. today. It is an uplift, a subtle elevation of the ground surface, in an area to the west of the South Sister volcano.

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Etna SEC - brown ash puffs on 01.30.2022 / 07:30 - photo Boris Behncke - click to enlarge

Etna SEC - brown ash puffs on 01.30.2022 / 07:30 - photo Boris Behncke - click to enlarge

The INGV-OE, reports that from 00:15 GMT this January 30, 2022, we observe the resumption of a modest and sporadic explosive activity at the southeast crater of Etna, the activity produces weak ash emissions brown (old materials) that disperse quickly in the summit region.

The amplitude of the volcanic tremor is on medium-low values. The source of the volcanic tremor is located in correspondence with the Southeast crater at an altitude of about 2500 m above sea level. The rate of occurrence of infrasonic events is low.
The stations of the soil deformation monitoring networks operating on the volcano show no significant change.

 

Sources: INGV OE and LAVE webcam

Etna SEC - different type emissions on 30.01.2022, respectively at 12:57 p.m. and 5:23 p.m. - LAVE webcam - one click to enlarge
Etna SEC - different type emissions on 30.01.2022, respectively at 12:57 p.m. and 5:23 p.m. - LAVE webcam - one click to enlarge

Etna SEC - different type emissions on 30.01.2022, respectively at 12:57 p.m. and 5:23 p.m. - LAVE webcam - one click to enlarge

Since 8:00 a.m. TL on January 30, 2022, several gas and ash emissions have been observed at Sangay with heights reaching 1500 meters above the level of the crater and in the east-southeast directions. The W-VAAC reported 4 emissions observed through the satellites and their directions varied between east and southeast, the
The estimated heights did not exceed 1800 meters above the level of the crater.

According to reports from SNGRE, a slight fall of ash has been confirmed in Macas, in the province of Morona Santiago.
According to the simulation of the ash cloud and the direction of the winds, this phenomenon could continue and generate ash falls in the province of Morona Santiago. This phenomenon has been recurrent throughout the current eruptive period of Sangay.
It is recommended to take appropriate measures and receive information from official sources.

Between January 29 and 30 at 11 a.m., seismicity is characterized by 122 explosion earthquakes, 10 LP earthquakes and 70 episodes of emission tremor.

The level of activity remains high, without changes.

 

Source: IGEPN

Sangay - between clouds, and emissions of ash and gas this 30.01.2022 07:10 local - webcam IGEPN

Sangay - between clouds, and emissions of ash and gas this 30.01.2022 07:10 local - webcam IGEPN

In the Galapagos, the Washington VAAC did not record observed satellite emissions at Wolf Volcano.
WORLDVIEW applications recorded 18 thermal anomalies and MIROVA recorded 1 high thermal anomaly (672 MW), and three smaller ones on January 30 in the past 24 hours.

At 19:52 UTC, through the MOUNTS project, a measurement of 2,173 t of SO2 is recorded for the Wolf volcano.

Surface and internal activity levels remain high, although decreasing.

 

Sources: IGEPN

Galapagos / Wolf volcano - GOES-16 sat measurements as of 01.30.2022 / 3:00 p.m. - Doc. IGEPN / NOAA- CIMSS

Galapagos / Wolf volcano - GOES-16 sat measurements as of 01.30.2022 / 3:00 p.m. - Doc. IGEPN / NOAA- CIMSS

Wolf - thermal anomalies as of 01.31.2022 / 04:40 - Doc. Mirova _MODIS_Latest10NTI

Wolf - thermal anomalies as of 01.31.2022 / 04:40 - Doc. Mirova _MODIS_Latest10NTI

Wolf - Radiative power as of 01.31.2022 / 04:40 - Doc. Mirova_MODIS_logVRP

Wolf - Radiative power as of 01.31.2022 / 04:40 - Doc. Mirova_MODIS_logVRP

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Publié le par Bernard Duyck
Publié dans : #volcanic activity

The Santa María-Santiaguito Volcanic Complex is in a period of high extrusive activity that built a lava dome in the Caliente Dome crater and generated lava flows with west and southwest directions.

From 6:45 p.m. local time on January 29, 2022, the INSIVUMEH seismic network located in the Santiaguito volcano records the descent of constant avalanches, the volcano is covered with cloud cover, but the west and south-west flanks of the Caliente dome can be most affected ; these avalanches are of weak, moderate and strong characteristics, this activity caused moderate to strong ash fall in Loma Linda and moderate ash in San Marcos Palajunoj, El Palmar, Quetzaltenango.

Collapses of materials accumulated in the crater dome and / or lava flows on the west and south-west flanks could cause the descent of pyroclastic flows on the flanks of the Caliente dome, especially in the west, south-west, south directions. and Southeast. As well as abundant ash fall in communities and farms near the volcano.

Santiaguito - 2022.01.29-30. - seismicity of the last hours - Insivumeh stationSTG8

Santiaguito - 2022.01.29-30. - seismicity of the last hours - Insivumeh stationSTG8

Santiaguito - ash dispersion map as of 01.29.2022 / 8 p.m. - Doc. Insivumeh

Santiaguito - ash dispersion map as of 01.29.2022 / 8 p.m. - Doc. Insivumeh

Conred is ready to take the necessary measures to keep communities and farms near the volcano within a radius of 3 to 5 kilometers prepared, to activate protocols before the fall of ash and / or the descent of pyroclastic flows during the following hours and days. It is recommended to limit the approach to the domes in any direction.

 

Sources: special volcanological bulletin Insivumeh & Conred

Taal - summary of observations as of 30.01.2022 / 05h - Doc. Phivolcs

Taal - summary of observations as of 30.01.2022 / 05h - Doc. Phivolcs

The Taal Volcano Network recorded eight “very weak” phreatomagmatic bursts from Taal Main Crater on January 29, 2022, between 3:50 p.m. and 9:57 p.m. These events were very short in duration, lasting only 10 seconds to two minutes and produced only traces in the seismic recording but were accompanied by distinct infrasound signals.

Steam-rich plumes 400m to 900m high were also detected by visual and thermal cameras around Lake Taal.

The sulfur dioxide flux since the start of 2022 has averaged 10,668 tonnes/day, with the highest average emission at 18,705 tonnes/day on January 27, 2022.

In contrast, almost no volcanic earthquake activity has been recorded since December 19, 2021, and Taal Volcano Island has deflated since October 2021 based on continuous GPS monitoring.

This type of activity continues on January 30 at 05h (see daily summary of observations)


The public is reminded that Alert Level 2 (heightened unrest) prevails at Taal Volcano and that such gas explosions and lethal accumulations or expulsions of volcanic gases may occur and threaten areas in and around TVI. DOST-PHIVOLCS strongly recommends that entry into TVI, the Taal Permanent Danger Zone or PDZ, especially the vicinity of the Main Crater and Daang Kastila Fissure, as well as human activities on Taal Lake, be strictly prohibited. .

 

Sources : TAAL VOLCANO ADVISORY 29 January 2022 10:00 P.M. and summary of activity 

Semeru - seismogram of 01.29.2022 / 10:47 p.m. WIB - Doc. PVMBG / Magma Indonesia

Semeru - seismogram of 01.29.2022 / 10:47 p.m. WIB - Doc. PVMBG / Magma Indonesia

Semeru experienced an eruptive episode on Saturday January 29, 2022 at 10:34 p.m. WIB. No visual rash was observed. This eruption was recorded on a seismograph with a maximum amplitude of 22 mm and a duration of 220 seconds.

 

During the last 24 hours, a plume is observable at the main crater, white and gray, of moderate to high intensity, about 200-500 meters from the summit.

Seismicity is characterized by:

- 39 eruption earthquakes, with an amplitude of 10-22 mm and an earthquake duration of 40-140 seconds.
- 1 pyroclastic flow earthquake, with an amplitude of 22 mm and an earthquake duration of 222 seconds.
- 1 avalanche earthquake, with an amplitude of 4 mm and an earthquake duration of 40 seconds.
- 3 blast/emission earthquakes, with an amplitude of 4 to 9 mm and an earthquake duration of 40 to 50 seconds.
- 21 harmonic episodes with an amplitude of 5-20 mm and an earthquake duration of 155-3306 seconds.
- 4 distant tectonic earthquakes

The activity level remains at 3 / siaga, with recommendations:

Do not carry out any activity in the southeastern sector along Besuk Kobokan, up to 13 km from the summit (the center of the eruption). Beyond this distance, the community does not conduct activities within 500 meters of the bank (river edge) along Besuk Kobokan due to the potential for hot clouds and lahars to expand up at a distance of 17 km from the summit.
Do not travel within 5 km of the crater/summit of Mount Semeru as it is subject to the danger of rock throwing (incandescent).

 

Sources: PVMBG, Magma Indonesia

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Volcanic activity on Ambae Island in Vanuatu continues at major unrest level. The Volcanic Alert Level remains at Level 2.


The activity of the volcano consists of steam emission and explosions of wet tephra ejected above the surface of the lake but confined in the caldera while only very light ash is deposited on the villages located near the volcano, in especially those exposed to wind directions.
New observations have confirmed that the volcanic cone formed inside Lake Voui and that the Ambae volcano continues to emit volcanic gases and ash contained in Lake Vui, which corresponds to the activity of the volcano. Ambae below Volcanic Alert Level 2 indicating “major level of unrest; the danger zone remains 2 km around the volcanic vents and in the drainage area.

The danger zone (Danger Zone A) remains at the summit about 2 km radius from the active 2017-2018 vent. Additionally, the presence of remnant volcanic ash elsewhere on the island (deposited during the 2017/18 eruption), may be mobilized by precipitation.

 

Source: AMBAE VOLCANO ALERT BULLETIN N01 was issued by the Vanuatu Meteorology and Geohazards Department on January 27, 2022 at 5:44 p.m.

Ambae - danger zones - doc. VMGD

Ambae - danger zones - doc. VMGD

The last born of the Pitons de La Fournaise was named Piton Karay.

The choice of this name was guided by the hemispherical pot shape of the volcanic cone. During the eruption, it notably hosted a lava lake overflowing several times from the edges of the crater.

" The word Karay designates in Reunionese Creole a hemispherical pot (similar to a “wok”) with two handles on the sides. In India, this kitchen utensil is generally called “karahi” (from Sanskrit kaṭāha) which was by the suite creolized in “caraye” (karay in KWZ spelling). This choice of name also honors the memory of the Indian workers, who enriched the Reunionese language with words such as Karay".

 

Source: OVPF

Piton de La Fournaise - the last born : Piton Karay - photo OVPF-IPGP - one click to enlarge

Piton de La Fournaise - the last born : Piton Karay - photo OVPF-IPGP - one click to enlarge

In La Palma, while the Cumbre Vieja volcano is degassing, cleaning continues wherever access is permitted according to the analyzes carried out regularly.

The first road reconstruction action is already underway on the lava flows south of the volcano, in the La Majada region, which will advance on the LP-213 to connect with about forty houses and provide accessibility to neighbors.

 

Sources : IGN, Cabildo de La Palma, I love the world

La Palma - CO2 control in the area of ​​La Bombilla in Los Llanos de Aridane - doc. IGM 27.01.2022 - one click to enlarge

La Palma - CO2 control in the area of ​​La Bombilla in Los Llanos de Aridane - doc. IGM 27.01.2022 - one click to enlarge

La Palma - creation of track in the lava flows - photo I love the world 26.01.2022 - one click to enlarge

La Palma - creation of track in the lava flows - photo I love the world 26.01.2022 - one click to enlarge

Kamaʻehuakanaloa Volcano may seem unfamiliar, because its name was recently updated: In July 2021, Lōʻihi Seamount was renamed Kamaʻehuakanaloa by the Hawaii Board on Geographic Names.

The USGS Hawaiian Volcano Observatory (HVO) monitors 6 volcanoes: Kīlauea (currently erupting at Halema'uma'u), Mauna Loa (most recent eruption in 1984), Hualālai (most recent eruption in 1801), Haleakalā (at Maui; most recent eruption 1480-1600 AD), Mauna Kea (most recent eruption over 4,000 years ago), and Kamaʻehuakanaloa (most recent activity 1996).

Hawaii - Lōʻihi seamount renamed Kamaʻehuakanaloa - Doc. USGS bathymetry - one click to enlarge

Hawaii - Lōʻihi seamount renamed Kamaʻehuakanaloa - Doc. USGS bathymetry - one click to enlarge

The seamount was recognized as an active underwater volcano and the youngest volcano in the long line of the Hawaiian-Emperor Range, due to earthquake swarms in the 1970s. The eruption is thought to Kamaʻehuakanaloa's most recent was in 1996, when HVO detected 4,377 earthquakes between mid-July and mid-August.

The old name Kamaʻehuakanaloa was descriptive (Lōʻihi = long), but did not reflect Hawaiian cultural knowledge.

Kama'ehuakanaloa "is a powerful name that evokes the name of Pelehonuamea and her birth in Kanaloa" (the ocean).

 

Source: Hawaii Tracker - Volcano Watch

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Fuego - Landsat-8 SWIR image from 26.01.2022 - via Insivumeh - one click to enlarge

Fuego - Landsat-8 SWIR image from 26.01.2022 - via Insivumeh - one click to enlarge

Fuego - Lansat-8 bands 7.6.2 image from 01.27.2022 - via Insivumeh - one  click to enlarge

Fuego - Lansat-8 bands 7.6.2 image from 01.27.2022 - via Insivumeh - one click to enlarge

The Fuego Volcano Observatory reports 5 to 7 weak and moderate explosions per hour. These explosions generate a column of ash from a height of 4,300 to 4,600 meters above sea level (14,108 to 15,092 feet) which disperses to the west and southwest of the volcano; low and moderate rumblings are reported, which cause vibrations in the roofs and windows of houses near the volcano.

Weak, moderate and strong avalanches are observed around the crater, and weak and moderate avalanches towards the barrancas Ceniza, Taniluyá and Trinidad and weak towards the barrancas Santa Teresa and Las Lajas.

A sound similar to a train locomotive lasting 5-8 minutes is reported, sometimes the sound is heard continuously with durations of 20-30 minutes.

Ash falls are reported in the communities of Panimaché I, Morelia, Santa Sofía, Palo Verde el Porvenir and others in this direction.

A lava flow in the direction of the Ceniza ravine with a length of 40 meters is reported, in front of this lava flow constant avalanches are generated in the direction of the barrancas Ceniza and Trinidad.

 

Source: Insivumeh / OVFGO

Callaqui - Night glow in the southwest of the crater - Doc. Sernageomin

Callaqui - Night glow in the southwest of the crater - Doc. Sernageomin

The Sernageomin reports the appearance of nocturnal incandescence in the southwestern sector of the crater of the Callaqui volcano, at 9:55 p.m. local time on January 26, 2022.

It is interpreted as a sign of an increase in temperature of uninterrupted emissions.

On the day of January 27, the degassing is observed with great intensity, coinciding with the incandescent focus, reaching a height of 380 meters usually recorded.

The volcanic technical alert is maintained for the moment at Green.

Callaqui - photo Oscar González-Ferrán (University of Chile) in GVP-06946

Callaqui - photo Oscar González-Ferrán (University of Chile) in GVP-06946

The Callaqui volcano is a volcanic center located in the Biobío region whose volcanic edifice was built by successive fissure eruptions. The oldest volcanic units have been dated to around 500,000 years old, while later units cover a wide range in the Late Pleistocene-Holocene.

Morphologically, the Callaqui volcano is an elongated center in a NE-SW direction due to the presence of notable dyke complexes and chains of pyroclastic cones of this orientation.
The magmas evacuated by the Callaqui volcano are mainly basalts and basaltic andesites evacuated mainly during Hawaiian and Strombolian eruptions.

 

Source: Sernageomin

Sakurajima - explosion of 28.01.2022 seen from the observatory of Satsuma Meiji Village / Tarumizu city, - Zaiho video https://youtu.be/eHfw8z8c-No

The Sakurajima presented an explosion on January 28, 2022 at 1:19 p.m. local time; it was accompanied by a plume of gas and ash at 3,400 meters.

 

Source: Zaiho Video

Sakurajima - Sentinel-2 bands 12,11,4 image dated 01.28.2022 - one click to enlarge

Sakurajima - Sentinel-2 bands 12,11,4 image dated 01.28.2022 - one click to enlarge

On January 27, 2022 at 7:16 a.m. local time, an eruption is recorded at the level of the Rincón de la Vieja volcano, the height reached by the column is unknown due to the visibility conditions of the site.
Duration of the activity: 1 minute.
No ash fall is reported, nor smell of sulfur.
A small lahar has been detected.

 

Source: Ovsicori

Rincón de la Vieja - eruption and partial outflow of the acid lake on the northern flank - photo 25.01.2022 Volcanes sin Fronteras

Rincón de la Vieja - eruption and partial outflow of the acid lake on the northern flank - photo 25.01.2022 Volcanes sin Fronteras

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Davidof and Khvostof Islands - Photo archives AVO / courtesy of Roger Clifford. - one click to enlarge

Davidof and Khvostof Islands - Photo archives AVO / courtesy of Roger Clifford. - one click to enlarge

Over the past two days, a swarm of earthquakes has occurred near Davidof Volcano in the Aleutians. The largest earthquake in the current sequence occurred yesterday at 4:02 p.m. AKST (January 26, 01:02 UTC) and had a magnitude of 4.9. A similar earthquake swarm occurred in December 2021. No signs of unrest were seen in recent satellite images of the volcano.

This seismic activity may be associated with volcanic unrest or be due to regional tectonic activity. Due to the possibility of escalating volcanic unrest, AVO is raising the Aviation Color Code and Volcanic Alert Level for Davidof to Yellow/Advisory

AVO continues to monitor the situation with seismometers deployed on nearby islands as there is no real-time seismic monitoring network at Davidof Volcano. The nearest seismometers to Davidof are about 15 km east of the volcano on Little Sitkin Island.

 

Source: AVO-USGS

Galapagos / Isabela - Wolf volcano - sat GOES-16 false color of 26.01.2022 / 10:50 UTC - Doc. NOAA / CIMSS - one click to enlarge

Galapagos / Isabela - Wolf volcano - sat GOES-16 false color of 26.01.2022 / 10:50 UTC - Doc. NOAA / CIMSS - one click to enlarge

The IG reported that the eruption of Wolf Volcano in the Galapagos Islands continued from January 18-25. Daily thermal alerts numbered in the hundreds, centered on advancing lava flows on the SE flank.

Diffuse gas emissions were visible drifting SW from 18 to 20 January. The level of activity remained stable at the beginning of the week then began a downward trend from 21 January.
 

On January 26 / 11 a.m., the IG reports a large-period (LP) earthquake.

MIROVA records 3 high thermal anomalies, respectively of VRP 282, 887, 248, 27 & 127 MW during January 25 and 26; in the last 12 hours, Worldview records 43.

 

Sources: IGEPN & Global Volcanism Program

Wolf - Thermal anomalies on 27.01.2022 / 05:05 - Doc. Mirova_MODIS_Latest10NTI

Wolf - Thermal anomalies on 27.01.2022 / 05:05 - Doc. Mirova_MODIS_Latest10NTI

Wolf - Sentinel-5P / SO2 image as of 01.26.2022 / 7:09 p.m. - via Mounts project

Wolf - Sentinel-5P / SO2 image as of 01.26.2022 / 7:09 p.m. - via Mounts project

Ovsicori has issued a map of the extension and thickness of the deposits of the pyroclastic flow that occurred on January 17, 2022 at the Turrialba Volcano.

Its maximum range was 400 meters, for a deposit of 20 to 40 cm.

In the central crater and the lakes, the deposits are more important, probably due to erosion and sedimentation of materials between the reference flights of 2020 and January 18, 2022.

The active crater has widened from 2 to 10 meters.

 

Source: Ovsicori 25.01.2022

Turrialba - Explosion and pyroclastic flow of 01.17.2022 / 9:33 p.m. - Ovsicori webcam

Turrialba - Explosion and pyroclastic flow of 01.17.2022 / 9:33 p.m. - Ovsicori webcam

Turrialba - deposits of the pyroclastic flow and the crater on 18.01.2022 (dimensions of the lake with asterisks*) - drone view of Ovsicori

Turrialba - deposits of the pyroclastic flow and the crater on 18.01.2022 (dimensions of the lake with asterisks*) - drone view of Ovsicori

Turrialba - the edges of the crater clearly visible on 18.01.2022 - photo Sofia Angulo via Ovsicori

Turrialba - the edges of the crater clearly visible on 18.01.2022 - photo Sofia Angulo via Ovsicori

The peaks of the Canary Islands are covered in snow today, and the soils have turned from ash black to a white coat.

Due to the presence of very thick snow on the road, on the 26th, 27th and 28th we cut the LP-4 road at its accesses from Pico de la Nieve to Roque de los Muchachos, and its access from Hoya Grande, to Garafía , at Roque de los Muchachos in La Palma.

On January 26, 2022, the Sentinel 2 satellite of Copernicus EU took this impressive image of Teide, located on the island of Tenerife, in which the last snowfalls can be seen on its summit in a gap between the clouds which covered a much of the island.

 

Sources: Cabildo de La Palma & Copernicus

La Palma - road to Roque de los Muchachos - photo 26.01.2022 / Cabildo de La Palma - click to enlarge

La Palma - road to Roque de los Muchachos - photo 26.01.2022 / Cabildo de La Palma - click to enlarge

Tenerife - Teide - Sentinel-2 Copernicus image from 26.01.2022 - one click to enlarge

Tenerife - Teide - Sentinel-2 Copernicus image from 26.01.2022 - one click to enlarge

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Publié le par Bernard Duyck
Publié dans : #volcanic activity

Ambrym Volcano, in Vanuatu, has gone from a state of minor unrest to a state of major unrest. The Volcanic Alert Level has been raised from Level 1 to Level 2.
New scientific analyzes suggest that the activity of the Ambrym volcano has increased considerably today January 25, 2022 early in the morning around 4 am. Steam has been observed over Marum Crater and a significant amount of steam, ash and gas has been observed over Benbow since 05:15 this morning. Volcanic hazards remain in the area of ​​the summit craters and in the southeastern part of Ambrym Island (eg major fissures in 2018). The quantities of sulfur dioxide emitted can generate acid rain and affect the populations of the east of the island.

Ambrym - plume of gas, steam and ash on 01.25.2022 / 06:00 - VGO webcam

Ambrym - plume of gas, steam and ash on 01.25.2022 / 06:00 - VGO webcam

Ambrym - sulfur dioxide plume on 01.25.2022 / 02:24 - Doc. SO2_PBL_zoom via Mounts project

Ambrym - sulfur dioxide plume on 01.25.2022 / 02:24 - Doc. SO2_PBL_zoom via Mounts project

Volcanic hazards are always present on Ambrym, specifically at the top and in the eastern part of the island. These are related to the presence of cracked areas. In addition to the summit hazards, the presence of faults and active faults (major ground cracking) in the southeast area of ​​Ambrym is also hazardous, they will continue to be eroded and affected by seismic activity. The danger zone for life safety in the summit area remains limited within the permanent exclusion zone at Benbow and danger zone A at Marum (see Ambrym caldera safety map below). These danger zones are approximately 1 km around the Benbow and 2 km around the Marum craters including Maben-Mbwelesu, Niri-Mbwelesu and Mbwelesu. An additional danger zone southeast of Ambrym remains within 500 meters of major fissures.

The latest observations and daily analysis of seismic data from Ambrym from the volcano monitoring system confirm that the activity of the Ambrym volcano continues at the level of major unrest. The lava lakes that appeared in Benbow and Marum craters have disappeared since the December 2018 eruption. The remaining activity inside the active craters is continuous steaming. Residents of Ambrym and neighboring islands will not see the volcanic glow at night. With this current volcanic activity, it's a helpful reminder that eruptions can occur at any level of unrest with little or no warning.

 

Sources: VMGD, Tropomi, Mirova and Mounts project

Rincon de La Vieja - 25.01.2022 / 11:40 a.m. - eruption and partial release of the acidic lake on the northern flank - Volcanes sin Fronteras

Rincon de La Vieja - 25.01.2022 / 11:40 a.m. - eruption and partial release of the acidic lake on the northern flank - Volcanes sin Fronteras

This Tuesday, January 25, 2022 at 11:40 a.m. Costa Rican time, an explosion is recorded in the Rincón de la Vieja volcano, which generated the partial flow of the acid lake on the northern flank.
On 2022-01-25 at 11:39 local time, an eruptive column rises 800 meters above the height of the crater and 2716 meters above sea level. (meters above sea level Wed).
Duration of the activity: 1 minute.
Neighbors share these photos from the event.
Caution is required on the bridges and ravines of the Pénjamo, Azul and Azufrada rivers because this explosion will form acidic and hot lahars in the next few minutes.

 

Sources: Volcanoes Without Borders, Ovsicori

Kilauea Halema'uma'u - new effusive phase as of 2022.01.25 / 9:14 PM HST - therm webcam. HVO

Kilauea Halema'uma'u - new effusive phase as of 2022.01.25 / 9:14 PM HST - therm webcam. HVO

After several days of intermittent minor activity confined to a small pond north of the western vent cone of Kilauea's Halema'uma'u Crater, At 5:52 a.m. this morning, activity restarted rigorously with a lava flow from the western vent cone that flowed west and north along the crater margin. At 6:30 a.m. HST the lava lake began to rise and by 8:20 a.m. HST had risen 11 meters to a total depth of 84 meters from when the lava emerged on September 29, 2021.

All recent lava activity has been confined to the crater, and there is no indication of activity migrating elsewhere on Kīlauea.

At midnight, summit tiltmeters recorded inflation, which continued until about 6 a.m. HST this morning; since then the incline has been flat and stable. The volcanic tremor associated with the eruption - as recorded by nearby seismometers - was barely above pre-eruption background values ​​until about 4:10 a.m. this morning when it began to rise.

 

Sources: HVO, Mirova

Kilauea- strong thermal anomaly on 01.26.2022 / 00:05 - Doc.MIROVA_MODIS_logVRP

Kilauea- strong thermal anomaly on 01.26.2022 / 00:05 - Doc.MIROVA_MODIS_logVRP

In Suwanosejima, in the Ryukyu archipelago, the explosive activity continues, with this January 25, 2022 at 6:17 p.m. local time an explosion, accompanied by a plume of ash at 1,200 m. or more above the Mitake crater. The dispersion of the ashes was made towards the south.

 

Source: JMA

Suwanosejima - ash plume from 01.25.2022 / 6:17 p.m. local - JMA webcam

Suwanosejima - ash plume from 01.25.2022 / 6:17 p.m. local - JMA webcam

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Turrialba - small eruption - webcam Ovsicori 24.01.2022 / 07:30

Turrialba - small eruption - webcam Ovsicori 24.01.2022 / 07:30

In Costa Rica, on 2022-01-24 at 7:06 a.m. local time, an eruption is recorded at the level of the Turrialba volcano, with a column that rises 100 meters above the height of the crater and 3440 meters above from sea level. (meters above sea level) (11283.2 feet).
Duration of the activity: 2 minutes.
The winds blow from the southwest.

Turrialba - the ashes fell near the place of emission - webcam Ovsicori 24.01.2022 / 08:20

Turrialba - the ashes fell near the place of emission - webcam Ovsicori 24.01.2022 / 08:20

At 02:25:00 local time on January 23, 2022, an eruption is recorded at the level of the Rincon de la Vieja volcano, the height reached by the column is unknown due to the visibility conditions of the site.
Duration of the activity: 1 minute.
Seismic activity is similar, compared to yesterday.
At the time of this report, the winds are blowing westerly.


This morning's eruption generated lahar(s) to the north of the volcano. A very slight 1-2 Hz frequency tremor was detected after the eruption. This signal has gradually disappeared this morning. In recent days, geodetic observations show no significant change.

 

Source: Ovsicori

Rincon de La Vieja - lahar generated by the eruption of 23.01.2022 / 02:25 on the rio Azufrada - Ovsicori / M .Gutierrez

Rincon de La Vieja - lahar generated by the eruption of 23.01.2022 / 02:25 on the rio Azufrada - Ovsicori / M .Gutierrez

Regarding the monitoring of the activity of the Nevado del Ruiz volcano, the Servicio Geologico Colombiano reports that during the last week, according to the analysis and evaluation of the parameters considered in the monitoring of volcanic activity, it has been shown that the Nevado del Ruiz volcano continues to exhibit behavioral instability.

Seismic activity, primarily related to fluid dynamics within volcanic conduits, continued to be recorded similarly to the past week.

On January 24 and 25, 2022, Mirova reports small thermal anomalies of VRP 5MW.

 

For the moment, this activity does not imply any change in the planned scenarios.
the level of volcanic activity remains at YELLOW or III, however, an acceleration of the volcanic process and consequently changes in the level of activity of the volcano remains possible.

 

Source: Servicio Geologico Colombiano / SGC

Nevado del Ruiz - ash plume from 01.24.2022 / around 8 a.m. - photo © Pierre Gondolff

Nevado del Ruiz - ash plume from 01.24.2022 / around 8 a.m. - photo © Pierre Gondolff

Nevado del Ruiz - ash plume from 24.01.2022 / around 8 a.m. - photo © Sylvain Chermette / 80 jours Voyages

Nevado del Ruiz - ash plume from 24.01.2022 / around 8 a.m. - photo © Sylvain Chermette / 80 jours Voyages

Nevado del Ruiz- anomalies thermiques au 23.01.2022 / 15h31 - Doc. Sentinel-2 bands  12,11,8A & Modis thermal volcanic activity - docMirova

Nevado del Ruiz- anomalies thermiques au 23.01.2022 / 15h31 - Doc. Sentinel-2 bands 12,11,8A & Modis thermal volcanic activity - docMirova

Low-level eruptive activity continues at Semisopochnoi from the northern cone of Cerberus. Seismicity remains elevated. Low-level steam and ash emissions were observed in web camera images. Nothing unusual was observed in the cloudy satellite data. A small explosion was detected by the local infrasound array this morning.

Small eruptions producing minor ash deposits near the active north crater of Mount Cerberus and ash clouds generally below 10,000 feet above sea level have characterized the recent activity. Small explosions and associated ash emissions may continue and be difficult to detect, particularly when heavy cloud cover obscures the volcano.

Semisopochnoi is monitored by local seismic and infrasound sensors, satellite data, web cameras, and remote infrasound and lightning networks.

Current alert level: Watch; Current aviation code: orange

 

Source: AVO

Semisopochnoi - 24.01.2022 / 12:47 HST - Webcam CETU - AVO

Semisopochnoi - 24.01.2022 / 12:47 HST - Webcam CETU - AVO

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