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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

A new change in eruptive behavior is reported to the Fuego this March 15 from 19:24, with an increase in degassing accompanying the lava flow, well observable at night on about 600 meters long in the Trinanca barranca.

An increase in avalanches is reported in Las Lajas, Trinidad and Cenizas barrancas.

Effusive activity is accompanied by weak explosions.

The seismic activity presents a continuous signal of low amplitude in relation to the expulsion of the materials feeding the lava flow and its degassing.

 

Sources: Gobierno de Guatemala & Insivumeh

Fuego - thermal anomalies on 16.03.2020 / 04h40 - Doc Mirova
Fuego - thermal anomalies on 16.03.2020 / 04h40 - Doc Mirova

Fuego - thermal anomalies on 16.03.2020 / 04h40 - Doc Mirova

This Fuego (Guatemala) Timelapse (15/03/2020) video was created by https://volcanoyt.com/camera/246 Source: Crelosavideos

In Costa Rica, the Ovsicori reports an eruption (probably of phreatic type) this March 14 at Rincon de La Vieja. It was accompanied by a strong tremor between 6:45 p.m. and 8:30 p.m. local. The height of the plume could not be estimated.

The neighbors indicate that the Quebrada Azufrada shows the presence in a small quantity of volcanic matter, transported by its waters.

 

Source: Ovsicori

Rincon de La Vieja - the active crater lake - image archives by Dr. Paulo Ruiz (Red Sismológica Nacional) & Dr. Cyrill Muller 02.2020 (OVSICORI).

Rincon de La Vieja - the active crater lake - image archives by Dr. Paulo Ruiz (Red Sismológica Nacional) & Dr. Cyrill Muller 02.2020 (OVSICORI).

The seismicity of Semisopochnoi, in the Aleutian arc, has increased in recent days, characterized by almost continuous tremor and frequent signals of small explosions.

The AVO consequently raised the volcanic alert to Watch on March 15 and the aviation code to orange.

No significant ash emission was detected by the satellites. The Semisopochnoi is monitored with a seismic network on the island and remotely by satellite and lightning sensors. An infrasound network on the island of Adak could detect the explosive emissions of Semisopochnoi with a delay of 13 minutes if the weather conditions allow it.

 

Source: AVO

Semisopochnoi - photo R.Clifford / AVO

Semisopochnoi - photo R.Clifford / AVO

On March 14, starting at 6:30 am local time, the monitoring stations of the Puyehue-Cordon Caulle volcanic complex recorded a swarm of 185 volcano-tectonic earthquakes, associated with rock fracturing, at 1,600 meters NNW from the emission center of 2011; the most energetic earthquake was Ml 2.2 at a depth of 4.3 km.

No surface activity has been described by the Sernageomin and the technical alert level remains green.

 

Source: Sernageomin

The Puyehue-Cordon Caulle complex on 22.10.2011 - photo ALI data from the EO-1 Team

The Puyehue-Cordon Caulle complex on 22.10.2011 - photo ALI data from the EO-1 Team

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Publié le par Bernard Duyck
Publié dans : #volcanic activity, #Sismologia
 Yasur - emission of gas and ash on 15.03.2020 / 10.45 am - Doc. VGO

Yasur - emission of gas and ash on 15.03.2020 / 10.45 am - Doc. VGO

In Vanuatu, Yasur activity is on the rise, with explosions in progress and emission of gases and / or volcanic ash observed. Villages near the volcano are likely to be impacted by ash falls and volcanic gases in an area NNW, current direction of the winds.

The volcanic alert remains at 2; the danger to life zone remains within the limits of danger zone A, approximately within 600 meters around the cone.

 

Source: VGO

Popocatépetl - activity of the last 24 hours - Doc. Cenapred / CNPC / Seguridad

Popocatépetl - activity of the last 24 hours - Doc. Cenapred / CNPC / Seguridad

Over the past 24 hours at Popocatépetl, Cenapred has identified 125 exhalations, accompanied by gas, water vapor and little ash, as well as explosions, including two minor around 11:07 p.m. and 4:05 a.m., and a moderate, the 14.03 at 8.45 p.m. All the explosions were responsible for a plume of about 1,500 meters, dispersing to the northeast, and for ejecting incandescent materials at a medium distance from the crater.

Between these episodes, gas emissions, and slight amounts of ash are reported.

Tremor was recorded for 189 minutes.

The volcanic alert remains at Amarillo Fase 2.

 

Source: Cenapred

Shishaldin - RSAM between 14.03 and 15.03.2020 at 7:30 a.m. - Doc. AVO / UTCSSBA_BHX

Shishaldin - RSAM between 14.03 and 15.03.2020 at 7:30 a.m. - Doc. AVO / UTCSSBA_BHX

AVO raised the alert level of the Shishaldin to Watch and the aviation code to orange this March 14 at 10:31 pm, following the observation on a high resolution satellite image of lava, and of what appears to be a new cone in the summit crater.

A weak tremor is also detected.

This increase is justified by a possible continuation of the activity, with little or no warning signs, resulting in lava flows outside the crater, lahars and ash clouds at low altitude.

 

Source: AVO

Klyuchevskoy - 15.03.2020 / 7:19 am - webcam IVS FEB RAS, KVERT

Klyuchevskoy - 15.03.2020 / 7:19 am - webcam IVS FEB RAS, KVERT

Strombolian activity continues at Klyuchevskoy on March 15, with an ash explosion reaching 5,500 meters asl. The ash and gas cloud drifted 170 km towards the ENE.

The aviation code remains orange, due to possible ash explosion between 5,000 and 7,000 meters asl. anytime

 

Sources: KVERT & VAAC Tokyo

 Reykjanes peninsula - location and magnitude of earthquakes at 15.03.2020 / 08h55 - Doc. IMO
 Reykjanes peninsula - location and magnitude of earthquakes at 15.03.2020 / 08h55 - Doc. IMO
 Reykjanes peninsula - location and magnitude of earthquakes at 15.03.2020 / 08h55 - Doc. IMO

 Reykjanes peninsula - location and magnitude of earthquakes at 15.03.2020 / 08h55 - Doc. IMO

The seismic swarm that started on March 12 northeast of Grindavík on the Reykjanes Peninsula is still in progress, but the intensity of the swarm has decreased since the start.

Many minor earthquakes are still detected in the region. At the start of the swarm, an M5.2 earthquake occurred approximately 5 km NE of Grindavík. During the first day of the swarm, eight more earthquakes above M3.0 were detected. Uplift is no longer observed in the area, which is likely due to the cessation of the influx of magma. The phase of uncertainty declared by the Civil Protection is still in force.

 

At 05:55, an M3.2 earthquake was detected just north of Herðubreið. More than 100 earthquakes have been located there since yesterday. About a week ago, a hundred earthquakes were also located there. Seismic swarms are common in this area, the last time an earthquake above M3.0 was detected in a similar area in November 2019.

 

Source: IMO / Icelandic Met Office

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
  Semeru - 14.03.2020 / 6.14 am WIB - Doc. Magma Indonesia

 Semeru - 14.03.2020 / 6.14 am WIB - Doc. Magma Indonesia

In Semeru, on level 2 / waspada alert, seismicity is characterized on March 14 between 12 am and 12 noon local time by:

- 14 avalanche earthquakes with an amplitude between 2 and 6 mm and a duration of 35 to 90 seconds,

- 8 breath earthquakes

- a volcanic earthquake, with a 14mm amplitude and a duration of 10 sec.

- and a distant tectonic earthquake.

Mirova reports thermal anomalies between 22 MW on March 12 and 124 MW on March 14.

 

Sources: Magma Indonesia & Mirova

Kadovar - last good image Sentinel-2 L1C image on 2020-02-21 bands 12,11,4 - one click to enlarge

Kadovar - last good image Sentinel-2 L1C image on 2020-02-21 bands 12,11,4 - one click to enlarge

VAAC Darwin issued an ash notice on March 14 for Kadovar, Papua New Guinea, and reports an explosive activity responsible for almost constant ash emissions reaching an altitude of 1,500 meters.

Aviation code is orange

 

Source: VAAC Darwin

Popocatépetl - explosion on 13.03.2020 / 8.46 p.m. - WebcamsdeMexico

Popocatépetl - explosion on 13.03.2020 / 8.46 p.m. - WebcamsdeMexico

In the past 24 hours, using Popocatépetl volcano monitoring systems, 163 exhalations have been identified, accompanied by water vapor, volcanic gases and small amounts of ash. In addition, a minor explosion was recorded earlier today at 7:01 a.m., which had a low ash content that dispersed in a southwest direction. There were also 97 minutes of tremors.

At the time of this report on March 13 at 11:00 GMT, emissions of volcanic gases and slight amounts of ash were presented, dispersing preferentially to the southwest.

 

The tracking by webcams shows a minor explosion at 8:46 p.m., accompanied by a plume of ash and gas reaching 1,500 meters and the expulsion of incandescent materials covering the side is 500 meters.

Another explosion was observed at 11:08 p.m.

The alert levels remain at Amarillo Fase 2, with a 12 km no-go zone.

 

Sources: Cenapred & Webcams from Mexico

Popocatépetl - 13.03.2020 / 23h08 - WebcamsdeMexico

Popocatépetl - 13.03.2020 / 23h08 - WebcamsdeMexico

In Peru, a lahar is reported by the Instituto Geofisico this March 13 at 4:30 p.m. on the southeast sector of the El Misti volcano; of moderate volume, it lasted about 15 minutes and borrowed the southeast quebradas, in the districts of Chiguata and Paucarpata.

 

Source: I.G. Peru

El Misti - sismo  of lahar on 13.03.2020 / 4.30 p.m. - I.G. Peru

El Misti - sismo  of lahar on 13.03.2020 / 4.30 p.m. - I.G. Peru

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Semeru - 06.03.2020 - Sentinel-2 bands image 112,11,4 - click to enlarge

Semeru - 06.03.2020 - Sentinel-2 bands image 112,11,4 - click to enlarge

From March 3 to 8, gray-black eruptive plumes rose 200 m above the summit of Semeru, interspersed with white gas plumes 100 m high. The glowing material was ejected 10-50 m above the summit; lava flows 500 to 1,000 m long continued to be active in the Kembar, Bang and Kobokan watersheds (on the S flank).

Lava flows on the southern flank remain active, currently measuring around 500 m-1000 m.

The alert level remained at 2 (on a scale of 1 to 4), and the public was reminded to stay outside the general radius of 1 km from the summit and 4 km on the SSE flank.

Source: PVMBG via GVP

Sakurajima - activity of 12.03.2020 / 2:39 p.m. - Doc. JMA

Sakurajima - activity of 12.03.2020 / 2:39 p.m. - Doc. JMA

At 2:33 p.m. on March 12, an eruptive episode occurred at Sakurajima (summit crater of Minamidake), and the plume rose to 2,100 m above the crater margin.

Volcanic ash flows from the crater to the northeast (direction Fukuyama, town of Kirishima), and in less than an hour, a small amount is reported in the town of Kagoshima (Sakurajima)

 

Source: JMA

Etna - 12.03.2020 in the evening, seen from Tremestieri Etneo - 2 active vents in Voragine - photo Boris Behncke

Etna - 12.03.2020 in the evening, seen from Tremestieri Etneo - 2 active vents in Voragine - photo Boris Behncke

The activity continues at Etna, according to the methods informed during the last INGV report on March 10, 2020.

 The eruptive activity at the summit crater of Voragine has been underway for 6 months now, where in recent days, two vents on the central cone formed inside the crater show strombolian activity.

 

Source: Boris Behncke

Reykjanes peninsula - location and magnitude of earthquakes at 12.03.2020 / 5.30 p.m. - Doc. IMO
Reykjanes peninsula - location and magnitude of earthquakes at 12.03.2020 / 5.30 p.m. - Doc. IMO
Reykjanes peninsula - location and magnitude of earthquakes at 12.03.2020 / 5.30 p.m. - Doc. IMO

Reykjanes peninsula - location and magnitude of earthquakes at 12.03.2020 / 5.30 p.m. - Doc. IMO

 Reykjanes peninsula - location and magnitude of earthquakes at 13.03.2020 / 07:10 - Doc. IMO
 Reykjanes peninsula - location and magnitude of earthquakes at 13.03.2020 / 07:10 - Doc. IMO

 Reykjanes peninsula - location and magnitude of earthquakes at 13.03.2020 / 07:10 - Doc. IMO

In the Reykjanes Peninsula, on March 12, 2020 at 10:26 a.m., an M5.2 earthquake occurred approximately 5 km NE of Grindavík. Several aftershocks have been detected. Today's earthquake is the largest earthquake detected on the Reykjanes Peninsula since October 2013 when an M5.2 earthquake occurred near Reykjanestá. The earthquake was felt in large areas of southwest Iceland.

Two earthquakes occurred at 6:40 p.m. (M3.4) and 6:42 p.m. (M3.3) about 3 km ENE of Grindavík. Reports have been received from Grindavík that they were felt there.

Uplift is no longer observed, which is likely due to the cessation of the influx of magma. The phase of uncertainty declared by the Civil Protection is still in force.

 

Source: IMO

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Nishinoshima - activity on March 9, 2020 - overview by the Japan Coast Guards

Nishinoshima - activity on March 9, 2020 - overview by the Japan Coast Guards

The Japanese Coast Guard flew over Nishinoshima (Ogasawara Islands) on March 9, confirming that the gray plume emitted reached an altitude of about 1,000 meters. The lava flows on the northeast flank of the crater for about 1 km to the north shore before flowing into the sea, where a plume of gas and vapor is visible.

Mirova has noted thermal anomalies, when the cloud cover does not prevent measurements, between 79 and 314 MW, for the period from 09 to 11.03.2020.

 

Source: Japan Coast Guards

Nishinoshima - 09.03.2020 / 13:29 - Glow at the top of the cone and in the background, due to lava flows - from a video in high IR of the Japan Coast Guards / Twitter

Nishinoshima - 09.03.2020 / 13:29 - Glow at the top of the cone and in the background, due to lava flows - from a video in high IR of the Japan Coast Guards / Twitter

Nishinoshima - thermal anomalies on 11.03.2020 / 12.40 p.m. - Doc. Mirova_MODIS_logVRP

Nishinoshima - thermal anomalies on 11.03.2020 / 12.40 p.m. - Doc. Mirova_MODIS_logVRP

The National Geological and Mining Service of Chile (SERNAGEOMIN) announced today that a yellow technical alert has been declared for the Antillanca-Casablanca volcanic complex, in the Los Lagos region.

The alert was generated after the detection on March 9 of a series of 73 seismic events located approximately 2.4 kilometers north-northwest of the Casablanca volcano, with a maximum magnitude of ML1.8. Other seismic events were detected respectively on January 31 and February 1 of MI 3.1-3.2 for the strongest west and northwest of the Casablanca volcano.

The other parameters do not show significant variations.

The Sernageomin specifies that the level of technical alert Amarilla corresponds to minor explosions or possible fumaroles.

Antillanca - Casablanca group - the Casablanca volcano - photo  Klaus Dorsch, 2001 (University of Munich) / GVP

Antillanca - Casablanca group - the Casablanca volcano - photo Klaus Dorsch, 2001 (University of Munich) / GVP

The Antillanca Group is a group of basalt to andesitic slag cones from the Upper Pleistocene to the Holocene, maars and small stratovolcanoes covering an area of ​​380 km2 SE of Lago Puyehue and NE of Lago Rupanco. The most prominent building is the Holocene stratovolcano of Casablanca, which has a truncated conical profile and produced major explosive eruptions about 2910 and 2260 years ago (radiocarbon dating).

Sources: Sernageomin & Global Volcanism Program

  Klyuchevskoy - photo archive IVS FEB RAS, KVERT 31.01.2020

 Klyuchevskoy - photo archive IVS FEB RAS, KVERT 31.01.2020

The activity continues at Klyuchevskoy, with this March 12, an explosion, accompanied by a plume of gas and steam, loaded with a little ash at 5,000-5,500 meters asl., extending over 70 km to the north of the volcano.

The aviation code remains orange, due to the continuation of the moderate activity still in progress.

 

Source: KVERT, and VAAC Tokyo

Kanlaon - summit at 2,435 m., with an elongated caldera and an active vent - Phivolcs archives 15.11.2017

Kanlaon - summit at 2,435 m., with an elongated caldera and an active vent - Phivolcs archives 15.11.2017

The Kanlaon Volcano seismic monitoring network recorded eight volcanic earthquakes during the 24-hour observation period.

Ground deformation data from continuous GPS measurements indicate a period of slow long-term inflation of the building since 2017, while short-term electronic monitoring of the slope on the southeast flanks recorded slow inflation lower slopes since May 2019 and pronounced inflation of upper slopes at the end of January 2020. These parameters indicate that hydrothermal or magmatic activity takes place deep beneath the building.

The alert level 1 (abnormal) status prevails over the Kanlaon volcano, which means that it is in an abnormal state and has entered a period of agitation. Local authorities and the public are strongly reminded that entry into the permanent danger zone (PDZ) with a radius of 4 kilometers must be strictly prohibited due to the additional possibilities of sudden and dangerous eruptions of steam or phreatic.

 

Source: Phivolcs

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Nevado del Ruiz - ash emissions from the last days - Doc. SGC

Nevado del Ruiz - ash emissions from the last days - Doc. SGC

The Servicio Géologico Colombiano informs the authorities and the community that in recent days, the snow-capped volcano Nevado del Ruiz (VNR) has presented small emissions of ash associated with seismic signals of low energy level.

A 10 MW thermal anomaly c was observed by Mirova on 10.03.2020 / 03h35.

On March 10, three gas and ash emissions were recorded today at 07:42 h 10:29 and 10:55 (local time), with column heights measured at the top of the volcano of 696, 346 and 552 m respectively, with a dispersion influenced by the wind direction and speed, which varied from the southwest to the southeast of the volcano.

Very fine ash fall is possible near the volcano and in populations located in the direction of the wind regime.

The different monitoring parameters show that the volcanic system is still unstable, which can give rise to new ash emissions.

The level of activity continues in yellow or (III): Changes in the behavior of volcanic activity.

 

Source: SGC

Nevado del Ruiz - thermal anomalies on 10.03.2020 / 6:50 p.m. - note on the bottom graph, the largest number of thermal anomalies spotted since December 2019 - Doc. Mirova_MODIS_logVRP

Nevado del Ruiz - thermal anomalies on 10.03.2020 / 6:50 p.m. - note on the bottom graph, the largest number of thermal anomalies spotted since December 2019 - Doc. Mirova_MODIS_logVRP

The Phivolcs raised the Kanlaon alert level from normal to abnormal / 1, following an increase in seismicity and inflation in the summit area.

Since March 9, 2020, 80 volcanic earthquakes, including 77 low frequency earthquakes (associated with magmatic fluids); since the end of January 2020, the parameters indicate a marked inflation of the upper slopes of the volcano.

This situation of instability can lead to a phreatic eruption or a magmatic intrusion.

Level 1 is associated with the ban on entering a radius of 4 km, and the aviation council to avoid flights near the summit.

 

Source: Phivolcs

Kanlaon - the historically active Lugud crater - photo 03.2010 / Billy Lopue, used under Creative Common BY-NC-ND 2.0 / GVP

Kanlaon - the historically active Lugud crater - photo 03.2010 / Billy Lopue, used under Creative Common BY-NC-ND 2.0 / GVP

During the period from March 2 to 8 (posted online on March 10), the INGV provides information on the activity of the upper craters of Etna, mainly characterized

- by Strombolian explosions and an effusion at the level of Voragine (VOR),

- and degassing with intermittent intermittent ash emission of strombolian ash from the new south-east crater (NSEC) and the north-east of the crater (NEC).

At the seismicity level, there is a low seismic fracturing activity and a stationary state of the volcanic tremor parameters. The infrasonic activity remains moderate. No significant deformation. The flow of SO2 is at an average level. The flow of CO2 from soils is at medium-low levels.

 

Source: INGV OE

 Etna - activity of 03.03.2020 in the evening - photo Boris Behncke

Etna - activity of 03.03.2020 in the evening - photo Boris Behncke

Etna - Map of the summit crater area (DEM 2014, Laboratory of aerogeophysics - Section Rome 2, mod.). Scalloped black lines = edge of upper craters: BN = Bocca Nuova, inside of which BN-1 and BN-2 are observed; VOR = sinkhole; NEC = Northeast Crater; SEC = Southeast Crater; NSEC = New Southeast Crater. Yellow dots = degassing vents. Red dots = mouths with eruptive activity. red line = active molded parts. Yellow lines = pouring in cooling. Gray circle = ash cone. - Doc. INGV OE

Etna - Map of the summit crater area (DEM 2014, Laboratory of aerogeophysics - Section Rome 2, mod.). Scalloped black lines = edge of upper craters: BN = Bocca Nuova, inside of which BN-1 and BN-2 are observed; VOR = sinkhole; NEC = Northeast Crater; SEC = Southeast Crater; NSEC = New Southeast Crater. Yellow dots = degassing vents. Red dots = mouths with eruptive activity. red line = active molded parts. Yellow lines = pouring in cooling. Gray circle = ash cone. - Doc. INGV OE

Whakaari / White Island remains in a high state of agitation.

The volcanic alert level remains at level 2; The aviation color code remains yellow.

Aerial observations confirm the overall drop in CO2 and SO2 production since the December 9, 2019 eruption, although the latest data shows slightly high amounts of gas compared to recent measurements.

A thermal infrared helicopter survey recorded a temperature of 746 ° C. This was measured on one of the lava lobes and is the warmest temperature measured to date. Despite these high temperatures of fumaroles, a small pond of water is present in the primary crater formed on December 9, 2019. Small-scale jets of this pond water continue to occur, as the activity observed in September-December 2019.

 

High temperatures and large amounts of gas are consistent with the continued presence of shallow magma below the main vent zone and fall within the expected range of fluctuation for post-eruptive processes. The active vent zone remains a rapidly changing environment and an eruption could occur with limited warning signs.

 Plausible triggers for an eruption include the collapse of unstable materials around the vents, the sudden release of magma gas, and the rapid entry of water onto the shallow magma body.

The volcanic alert level remains at level 2. The aviation color code remains yellow.

 

Source: GeoNet

Whakaari White Island - photo NZ Geo 02.2020

Whakaari White Island - photo NZ Geo 02.2020

White island - gas plume of 10.03.2020 / 9.30 a.m. NZDT - White island crater floor webcam / GeoNet

White island - gas plume of 10.03.2020 / 9.30 a.m. NZDT - White island crater floor webcam / GeoNet

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Sabancaya - activity summary between 2 and 8 March 2020 - Doc. I.G.Peru

Sabancaya - activity summary between 2 and 8 March 2020 - Doc. I.G.Peru

The Peruvian Geophysical Institute (IGP) reports that the eruptive activity of the Sabancaya volcano between March 2 and 8 remained at moderate levels, with the continuous recording of moderate explosions and the consequent emission of ash and gas. Consequently, for the following days, no significant change is expected regarding its activity.

During the above-mentioned period, the IGP recorded and analyzed the occurrence of approximately 748 earthquakes of volcanic origin, associated with the circulation of fluids (magma, gas, etc.) inside the volcano, in addition to 17 daily explosions of medium to low intensity, accompanied by columns of gas and ash up to 3.7 km high above the summit of the volcano, scattered towards the west, north and northwest sectors of the volcano.

The monitoring of the deformation of the volcanic structure records significant anomalies. Satellite surveillance has identified the presence of 5 thermal anomalies with values ​​between 1MW-15MW, associated with the presence of a lava body in the crater.

It is recommended to maintain the level of volcanic alert in Naranja and not to approach a radius of less than 12 km from the crater.

 

Source: I.G. Peru

Ubinas - activity summary between 2 and 8 March 2020 - Doc. I.G.Peru

Ubinas - activity summary between 2 and 8 March 2020 - Doc. I.G.Peru

The Geophysical Institute of Peru (IGP) reports that the eruptive activity of the Ubinas volcano, between March 2 and 8, remained at low levels. To date, the record of earthquakes that would be associated with the rise of magma to the surface is weak. In addition, there are sporadic emissions of bluish gases (of magmatic origin) and water vapor. According to this scenario, the possibility of volcanic explosions and / or low ash emissions remains low. The volcanic alert could be lowered to Amarillo.

 

Source: I.G. Peru

Popocatépetl - 09.03.2020 / 08.45 am - WebcamsdeMexico

Popocatépetl - 09.03.2020 / 08.45 am - WebcamsdeMexico

Cenapred reports for the last 24 hours to Popocatépetl, 176 exhalations accompanied by water vapor, volcanic gases and slight amounts of ash, and two minor explosions, one yesterday at 5:28 pm and the other today today at 07:46 h.

797 minutes of small amplitude tremor were also counted. During this morning, a slight fall of ash occurred in Amecameca, in the State of Mexico.

Then, volcanic gas emissions and small amounts of ash dispersed in the northeast of the north.

Popocatépetl volcanic alert remains at Amarillo Fase 2

 

Sources: Cenapred

Sangay - aerial photo archives by Patricio Ramon - IGEPN

Sangay - aerial photo archives by Patricio Ramon - IGEPN

In Ecuador, the IGEPN reports a high and unchanging explosive activity at the Sangay and Reventador volcanoes, with emission of ash and gas plumes respectively at 6,400 meters and 4,600 meters above sea level, according to VAAC Washington.

Alert levels remain unchanged

 

Sources: IGEPN & VAAC Washington

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Klyuchevsloy - 09.03.2020 / 07h13 - KVERT webcam

Klyuchevsloy - 09.03.2020 / 07h13 - KVERT webcam

An explosive eruption of moderate Strombolian type continues at Klyuchevskoy, characterized this March 9 by a plume of gas and a little ash at 5,500 meters asl., Then extending for 125 km towards the northeast of the volcano

The aviation code is orange, ash explosions can occur at any time.

 

Sources: KVERT, Mirova & VAAC Tokyo

Klyuchevskoy - 09.03.2020 / 01h55 - Doc. Mirova_MODIS_Latest10NTI - one click to enlargeKlyuchevskoy - 09.03.2020 / 01h55 - Doc. Mirova_MODIS_Latest10NTI - one click to enlarge

Klyuchevskoy - 09.03.2020 / 01h55 - Doc. Mirova_MODIS_Latest10NTI - one click to enlarge

In the Philippines, the activity of the main crater of Taal is characterized for the day of March 7 by a low emission of a plume of vapor - 100 meters high.

On March 8, the plume is observed at a height of 300-500 meters drifting to the southwest. Over the past 24 hours, 20 volcanic earthquakes, associated with rock fracturing, have been recorded.

Level 2 alert is maintained, as is the ban on access to the volcanic island.

 

Source: Phivolcs reports of March 8 and 9/8 a.m.

 Taal - Sentinel-2 L1C image on 2020-03-08 bands 12,4,2 dated 08.03.2020

 Taal - Sentinel-2 L1C image on 2020-03-08 bands 12,4,2 dated 08.03.2020

In Semeru, on Java, avalanches took place this March 8, 2020 with a maximum sliding distance of 700 m towards Twin Besuk and Besuk Kobokan.

Seismicity is characterized by episodes of non-harmonic tremor with an amplitude of 3-10 mm for 920-2300 seconds.

This March 9, Magma Indonesia reports 2 avalanche earthquakes with an amplitude of 4-7 mm and a duration of 55-65 sec., And a blast earthquake of 60 sec. And amplitude of 4 mm.

The summit of the volcano is covered with fog

The activity level is 2 / waspada, with prohibition to approach within a radius of 4 km from the active crater Jongring Seloko.

 

Source Magma Indonesia

  Semeru - 09.03.2020 / 12:18 p.m. - Magma Indonesia

 Semeru - 09.03.2020 / 12:18 p.m. - Magma Indonesia

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Popocatépetl - 07.03.2020 / 07h26 - WebcamsdeMexico

Popocatépetl - 07.03.2020 / 07h26 - WebcamsdeMexico

The Cenapred informs during the last 24 hours to Popocatépetl 189 exhalations, some of these events were accompanied by gas emissions and slight amounts of ash. and three minor explosions recorded yesterday at 7:30 p.m., 9:20 p.m. and March 7 at 7:23 a.m. At the seismicity level, 215 minutes of tremor were also recorded

Since this morning and until the time of this report at 11:15 a.m., volcanic gas emissions and slight amounts of ash have been presented which are scattered towards the northeast.

Cenapred requests not to access the volcano.

The Popocatépetl volcanic alert remains at Amarillo Fase 2.

 

Source: Cenapred

Popocatépetl - summary of activity over the past 24 hours - Doc. Cenapred / CNPC / Seguridad

Popocatépetl - summary of activity over the past 24 hours - Doc. Cenapred / CNPC / Seguridad

The news of volcanic areas is rather summarized at this time by news of the developed seismicity.

In the Reykjanes Peninsula, seismic activity continues at the southwestern tip of Reykjanestá since February 15. We distinguish on March 6 at 4:55 pm an earthquake of M 3.1.
Earthquakes have greatly decreased near Thorbjorn, but the status unquestionably promulgated by the Civil Protection remains current.
IMO always advises against excursions to the Eldvörp region.

 

Source: IMO

Reykjanes peninsula - location and magnitude of earthquakes - Doc. IMO 07.03.2020 / 19h20
Reykjanes peninsula - location and magnitude of earthquakes - Doc. IMO 07.03.2020 / 19h20

Reykjanes peninsula - location and magnitude of earthquakes - Doc. IMO 07.03.2020 / 19h20

On March 7, 2020 at 8:58 p.m. (Canary time), the seismic stations of the Canaria seismic network (C7) of the Canary Volcanological Institute (INVOLCAN) recorded an earthquake of magnitude 5.5 according to the Spanish Geographic Institute and M 5.2 according to EMSC (Euro-Mediterranean seismological center) and NEIC (National Earthquake Information Center).

The epicenter of this earthquake is located in the Madeira archipelago, about 50 kilometers south of Funchal, and was very clearly felt on the islands of Madeira and Porto Santo Santo. This seismic event was felt with less intensity also in Lisbon, as well as in the islands of Tenerife and La Palma, located approximately 1,000 and 380 kilometers from the epicenter respectively.
Another shake of Ml4.3 is reported at 9:22 p.m. by the IGN.

 

Sources: InVolcan, IGN and EMSC

Madère - epicenter of the earthquake of 07.03.2020 / 20.58 Can - M5.2 (review) depth 10 km - Doc.EMSC

Madère - epicenter of the earthquake of 07.03.2020 / 20.58 Can - M5.2 (review) depth 10 km - Doc.EMSC

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Klyuchevskoy - 07.03.2020 / 07h56 - Webcam of IVS FEB RAS, KVERT - Частота кадров: 1 кадр / 1 мин

Klyuchevskoy - 07.03.2020 / 07h56 - Webcam of IVS FEB RAS, KVERT - Частота кадров: 1 кадр / 1 мин

In Kamchatka, the Klyuchevskoy continues its moderate explosive eruption, characterized by Strombolian activity and gas and vapor emissions.

During the last night, a recording of the webcam lasting 10 hours shows, like the satellite images, a nice thermal anomaly. Incandescent avalanches are noticed for 3-4 hours.

Aviation code stays orange.

 

Sources: KVERT, VAAC Tokyo and Mirova

Klyuchevskoy - thermal anomalies on 07.03.2020 / 02h05 - Doc. Mirova_MODIS_VRP

Klyuchevskoy - thermal anomalies on 07.03.2020 / 02h05 - Doc. Mirova_MODIS_VRP

March 6/7, 2020, ~ Extreme Activity ~ Klyuchevskoy Volcano, Russia / You can speed up or slow down with the video controls provided by YouTube.

On Big Island, Kilauea and Mauna Loa are NOT erupting.

The alert levels and aviation code are respectively for Kilauea: normal / green - for Mauna Loa: advisory / yellow.

The USGS provides us with its weekly sighting reports.

Big island and its volcanoes - The lava flows that have occurred over the past 200 years, shown in red, indicate the location of the Big Island rift zones. - Doc. Hilo u

Big island and its volcanoes - The lava flows that have occurred over the past 200 years, shown in red, indicate the location of the Big Island rift zones. - Doc. Hilo u

For the Mauna Loa volcano, the deformation and seismicity rates have not changed significantly over the past week and remain above long-term background levels.

HVO seismometers recorded around 70 small magnitude earthquakes under the higher altitudes of the volcano. Most of these events occurred at shallow depths less than 5 km (~ 3 miles) below ground level.

Separately, a flurry - totaling around 70 small earthquakes so far - has occurred just south of the northeast rift zone of Mauna Loa, where known fault structures generally produce shallow seismicity.

The strongest earthquake in Mauna Loa recorded during this period was a 3.7 magnitude event in the early hours of February 28. This earthquake was located approximately 10 kilometers (~ 6 miles) northeast of Hawaiian Ocean View Estates, in an area where earthquakes of similar magnitude normally occur several times a year.

Global positioning system (GPS) measurements show continued slow top inflation, consistent with magma supply from the volcano's shallow storage system.

Gas concentrations at the sulfur cone monitoring site in the southwest rift zone remain stable. The temperatures of the fumaroles measured both at the sulfur cone and at the top did not change significantly.

Comparison of the water pond in Halema‘uma‘u on November 20, 2019, and March 1, 2020. Camera and lens same for both photos. Since November 20, 2019, the pond deepened 10 m (33 ft) and widened more than 50 m (164 ft) east-west and 30 m (98 ft) north-south. Circled clusters of rocks did not move between photos, evidence of slope stability. The water's color browned with time, though the photos probably exaggerate the color difference. The blue-green water at the far and near ends of the pond is interpreted as groundwater entering the pond. - USGS photos by D. Swanson.

Comparison of the water pond in Halema‘uma‘u on November 20, 2019, and March 1, 2020. Camera and lens same for both photos. Since November 20, 2019, the pond deepened 10 m (33 ft) and widened more than 50 m (164 ft) east-west and 30 m (98 ft) north-south. Circled clusters of rocks did not move between photos, evidence of slope stability. The water's color browned with time, though the photos probably exaggerate the color difference. The blue-green water at the far and near ends of the pond is interpreted as groundwater entering the pond. - USGS photos by D. Swanson.

For Kilauea, monitoring data for February shows variable but typical rates of seismicity and soil deformation, low rates of sulfur dioxide emissions and only minor geological changes since the end of activity eruptive in September 2018.

The pond of acid water at the bottom of Halema'uma'u continues to expand and deepen slowly. In early March, the dimensions of the pond were approximately 100 meters by 200 meters. The current depth is around 28 meters.

In the past month, the summit inclinometer recorded about 9 deflation-inflation events, a number similar to January. Since March 2019, GPS stations and inclinometers at the top of Kīlauea have recorded a deformation consistent with a slow accumulation of magma in the shallow part of the magma system at the top of Kīlauea (1-2 km or about 1 mile below level of the ground).

 

Farther east, GPS stations and inclinometers continue to show movements compatible with a slowed-down filling of the deep magmatic reservoir of the East Rift zone in the vast region between Puʻu ʻŌʻō and route 130. In February, the rates of deformation in this region have decreased slightly. Monitoring data do not suggest any imminent change in the volcanic danger for this area.

Although not currently erupting, areas of high and persistent ground temperatures and minor gas releases are still in the vicinity of the cracks in the lower east rift zone 2018. These include steam (water), very small amounts of hydrogen sulfide and carbon dioxide. These conditions are expected to remain long term.

 

Source: HVO / USGS - Hawaii Volcano Observatory

Hike to the top of crack 8 / Kilauea eruption of 2018 - Video Copyright © 2020 Apau Hawaii Tours

The unrest continues at the Great Sitkin, with a volcanic advisory alert and aviation yellow code.

The seismicity of the Great Sitkin was slightly elevated for much of the past week. On Friday March 6, 2020 at 6:31 a.m. AKST (3:31 p.m. UTC), a relatively large and shallow magnitude 3.5 earthquake occurred 1 km from the summit. Since then, seismicity has returned to levels comparable to those recorded at the start of the week. Although this earthquake represents a significant increase in the seismic activity of the volcano, it does not mean that an eruption is imminent. There has been no evidence of activity in the satellite data over the past week, although sightings have been limited by cloud cover.

 

Source: AVO

Great Sitkin - AVO archives 06/18/2019 / 5:52 p.m. AKDT- photo Laura Clor / AVO

Great Sitkin - AVO archives 06/18/2019 / 5:52 p.m. AKDT- photo Laura Clor / AVO

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