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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
Planchón Peteroa - 01.02.2019 - photo Sernageomin

Planchón Peteroa - 01.02.2019 - photo Sernageomin

On 1st February from 5 pm local time, the cameras of the Planchón Peteroa volcanic complex recorded a steady and continuous increase in particulate matter emissions, with a column of 2,000 meters and a dispersion towards the east. This episode was accompanied by VLP earthquakes between 17 and 19h local, in connection with the injection of magma from a greater depth, and tremor.

The increase in ash emissions and seismicity suggest an open system, and possible new minor eruptive episodes affecting the area of ​​active craters.

The technical alert is maintained in Amarillo level.

 

Source: Sernageomin

Planchón Peteroa - 01.02.2019 - photo Sernageomin

Planchón Peteroa - 01.02.2019 - photo Sernageomin

The Turrialba, in Costa Rica, was the seat the 1st of February at 6:46 of a small eruption; it produced a plume of gray ash that rose 400-500 meters above the crater before dispersing to the northwest northwest.

The eruption lasted 15 minutes.

Source: Red Sismologica Nacional

 Turrialba - 01.02.2019 / 6:47 - RSN

 Turrialba - 01.02.2019 / 6:47 - RSN

Boris Behncke reports for the 1st of February pulsatile emissions of ash at the Bocca Nuova of Etna.

According to the volcanologist, there is no evidence of the arrival of new magma on the surface, all the material emitted being derived from magma already present in the system for a while.

The northeast crater emitted during the day a plume of steam and gas flapped by the winds.

Sources: Boris Behncke, Gio Giusa and Jos. Nasi

Etna - 01.02.2019 - ash emission by the Bocca nuova, seen from Tremestieri Etneo - picture Boris Behncke

Etna - 01.02.2019 - ash emission by the Bocca nuova, seen from Tremestieri Etneo - picture Boris Behncke

Etna - 01.02.2019 - ash emission by the Bocca nuova, and degassing of the NEC - photo Gio Giusa

Etna - 01.02.2019 - ash emission by the Bocca nuova, and degassing of the NEC - photo Gio Giusa

Etna - 02.02.2019 /  9h41 GMT - photo J.Nasi / Butterfly helicopters

Etna - 02.02.2019 / 9h41 GMT - photo J.Nasi / Butterfly helicopters

A white, 300 meter high degassing plume overcame the Pacaya on January 31, with a westward dispersion.

Seismicity is characterized by a tremor associated with rising magma and gases to the surface.

Strombolian explosions, between 5 and 30 meters, animate the Mackenney crater; during the night, incandescence is observed, as well as two lava flows in a northwesterly direction, measuring about 70 and 75 meters.

Source: Insivumeh & Conred

 Pacaya degassing - photo Conred 01.02.2019

 Pacaya degassing - photo Conred 01.02.2019

The month of January 2019 will have been marked in the Piton de la Fournaise by a low seismicity under the summit craters, a lack of significant deformation, and CO2 fluxes in the ground in far field relatively constant on low values. This testifies to the absence of magmatic transfers from the deep zones to the more superficial zones (or at least their slowdown).

Piton de La Fournaise - Comparison between the standardized means of ground CO2 flow data, gross (in blue) and corrected (in red), recorded on far-field stations (a) since October 2016 (date installation of the last station) and (b) over one year. The eruptive periods are represented in red. - Doc.OVPF

Piton de La Fournaise - Comparison between the standardized means of ground CO2 flow data, gross (in blue) and corrected (in red), recorded on far-field stations (a) since October 2016 (date installation of the last station) and (b) over one year. The eruptive periods are represented in red. - Doc.OVPF

A seismic activity affects the island of Mayotte since the beginning of May 2018. These earthquakes form a swarm with epicentres grouped at sea, 30 to 60 km east of the coast of Mayotte. The vast majority of these earthquakes are of low magnitude, but several events of moderate magnitude (at most M5.9) have been strongly felt by the population and have damaged some buildings.

In January, the month was particularly active with 21 earthquakes of Magnitude > 4. In parallel, data from the Teria network GPS stations installed on the island of Mayotte, which are distributed by the RGP of the Institut Géographique National (IGN), have always indicated since July an overall shift towards the is (about 12cm since July) and subsidence (subsidence of about 5-10cm following the sites since July.

Automatic and daily calculations have been set up at the OVPF (via the Gipsy software) in order to follow these deformations, as well as the source at their origin. Thus for the last 3 months, the source of "depressurization" at the origin of these movements could be located about thirty km east of Mayotte and about 35-45km deep. This suggests that fluid transfers in the crust are still continuing

Source: OVPF - IPGP

Find all the information related to the Piton de la Fournaise activity on the different media of the OVPF-IPGP:

- the website (http://www.ipgp.fr/fr/ovpf/actualites-ovpf)

- the Twitter account (https://twitter.com/obsfournaise?lang=en)

- the Facebook account (https://www.facebook.com/ObsVolcanoPitonFournaise)

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Nevados of Chillan - explosion of 31.01.2019 / around 15h09 - photo Sernageomin

Nevados of Chillan - explosion of 31.01.2019 / around 15h09 - photo Sernageomin

On January 31 at 15:09 local, the seismic stations of Nevados de Chillan, Chile, recorded an LP earthquake associated with fluid dynamics inside the volcanic system, at a depth of 1,100 meters, followed by an explosion considered as minor, and as part of the orange alert level.

Tremor and volcano-tectonic earthquakes were also observed, including the most energetic located 7.9 km to the SSE of the crater, and a depth of 1.2 km.

 

It follows an explosion observed at 07h local, and pulsatile emissions of white to gray, depending on the content of particles.

Source: Sernageomin

Nevados de Chillan - explosion on 31.01.2019 / 07h seen from the town of Retiro

Nevados de Chillan - explosion on 31.01.2019 / 07h seen from the town of Retiro

Also in Chile, a volcano-tectonic earthquake associated with rock fracturing was recorded 11.5 km southwest of the main crater of Guallatiri; of local magnittude 3,4, its depth is 10,8 km.

The Sernageomin keeps the technical alert to verde.

The Guallatiri - photo Gerard Prins 1990

The Guallatiri - photo Gerard Prins 1990

In Fuego, Guatemala, activity remains within the norms of January, with weak to moderate explosions.

On the 1st of February, nocturnal glow is observed, and the rhythm of the explosions is 13 to 18 per hour at the beginning of the day, with plumes of ashes reaching 4,800 m. asl. ...


the parameters that has changed is the direction of the winds, to the east and north-east. The ashfall affects Alotenango, Antigua Guatemala, Ciudad Vieja, and the capital Ciudad Guatemala.

Avalanches are observed in the Seca, Tanilyua, Ceniza, Trinidad and Las Lajas barracks, with material lifts.

 

Sources: Insivumeh & Conred

Rincon de La Vieja - summit acidic crater lake, with traces of mud (in the foreground) - photo Chris Allen, via RSN

Rincon de La Vieja - summit acidic crater lake, with traces of mud (in the foreground) - photo Chris Allen, via RSN

A photo from the end of January illustrates the phreatic activity that animated the summit lake of Rincon de La Vieja: mud covers one of the edges of the crater.

The phreatic activity causes overflows of acidic waters of the crater lake, which flow in the drainages to feed lahars in the northern sector of the massif.

 

Sources: Ovsicori and RSN

Sentinel-1 interferometry (multi-data amplitude product RGB) revealing volcanic deposits and surface changes due to the recent activity of Sheveluch - Doc. S.Valkaniotis / treated with ESA GEP

Sentinel-1 interferometry (multi-data amplitude product RGB) revealing volcanic deposits and surface changes due to the recent activity of Sheveluch - Doc. S.Valkaniotis / treated with ESA GEP

The Sheveluch, in Kamchatka, continues its activity, characterized by the growth and incandescence of the dome, avalanches and pyroclastic flows and a strong fumarolic activity.

On January 31, a plume of ash is observed at 4,000-4,500 meters asl., drifting westward for 223 km.

InSAR interferometric images taken by Sentinel-1 reveal new volcanic deposits and surface changes as a result of recent activity.

 

Sources: KVERT & Sotiris Valkaniotis

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Sangeang Api - 30.01.2019 - Sentinel images 2 bands 12,11,4 and zoom - one click to enlarge
Sangeang Api - 30.01.2019 - Sentinel images 2 bands 12,11,4 and zoom - one click to enlarge

Sangeang Api - 30.01.2019 - Sentinel images 2 bands 12,11,4 and zoom - one click to enlarge

Mirova reports a small thermal anomaly (6 MW) at Sangeang Api on a small island off the northeastern coast of Sumbawa in the Lesser Sunda. Two small hot spots are visible at the top on a Sentinel 2 image of 30.01.2019.

The Sangeang Api is considered in eruption since 15 July 2017 by the GVP, and in activity level 2 / waspada by the PVMBG, together with a forbidden zone of 1.5 km around the center of activity.

In the first half of January 2019, moderate thermal anomalies were recorded, but not commented. Seismicity consists mainly of earthquakes.

The activity described in 2017 was of Strombolian type, accompanied by occasional ash plumes.

 

Sources: Mirova & Sentinel 2

Sangeang Api - weak thermal anomaly at 30.01.2019 / 2:45 pm - Doc. Mirova_MODIS_logVRP

Sangeang Api - weak thermal anomaly at 30.01.2019 / 2:45 pm - Doc. Mirova_MODIS_logVRP

Sangeang Api - Seismicity at 30.01.2019 - Doc. Magma Indonesia

Sangeang Api - Seismicity at 30.01.2019 - Doc. Magma Indonesia

Barren Island, in the Andamman Islands, considered by the GVP in eruption from September 25 to November 12, 2018, has always been subject to thermal anomalies; they are considered as low to moderate by the Mirova site, but were the subject of a VAAC Darwin advisory on 26.01.2019, with an orange aviation code.

DTG: 20190126 / 1945Z
VAAC: DARWIN
VOLCANO: BARREN ISLAND 260010
PSN: N1217 E09351
AREA: INDIA
SUMMIT ELEV: 354M
ADVISORY NR: 2019/4
INFO SOURCE: HIMAWARI-8
AVIATION COLOR CODE: ORANGE
ERUPTION DETAILS: VA LAST OBS TO FL030 MOV W AT 26 / 0950Z

Barren island - thermal anomalies from February 2018 to January 30, 2019 - Doc. Mirova

Barren island - thermal anomalies from February 2018 to January 30, 2019 - Doc. Mirova

Barren island - image Sentinel-2 image bands 12,11,4 from 26.01.2019 - one click to enlarge

Barren island - image Sentinel-2 image bands 12,11,4 from 26.01.2019 - one click to enlarge

The activity is centered on the pyroclastic cone located in the center of the summit caldera, 2 km wide, surrounded by walls 250-350 meters high and open to the west, created during an explosive eruption at the end of Pleistocene; the cone is surrounded by lava flows that fill most of the caldera, and cover a depression that reaches the sea. This morphology is well illustrated on the image Sentinel 2 in natural colors below.

Sources: Mirova & VAAC Darwin

Barren island - image Sentinel-2 nat. nat. colors from 26.01.2019 - one click to enlarge

Barren island - image Sentinel-2 nat. nat. colors from 26.01.2019 - one click to enlarge

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Tinakula - steam plume on 16.01.2019 - photo Zey Yian / Facebook

Tinakula - steam plume on 16.01.2019 - photo Zey Yian / Facebook

The activity seems to have resumed, on Tinakula (also called Tamani, or Tinakoro) according to aerial photos (16.01.2019) and satellites (Sentinel 2 on 27.01.2019).

This small island, 3.5 km wide, is the emerged summit of a massive stratovolcano, located northwest of the Santa Cruz Islands, in the group of Solomon Islands (Melanesia).

Its topography is similar to that of Stromboli, with a breached summit and a "sciara" from the summit to below sea level.

The current activity is likely strombolian type, and marked by a weak thermal anomaly and a vapor plume.

Its last eruption, VEI 3, dates back to October 2017.

 

Sources: Sentinel 2 and Zey Yian / FB

Tinakula - Sentinel2 images from 27.01.2019, left in natural colors, right bands 12,11,4, in which we notice a thermal anomaly - a click to agarndirTinakula - Sentinel2 images from 27.01.2019, left in natural colors, right bands 12,11,4, in which we notice a thermal anomaly - a click to agarndir

Tinakula - Sentinel2 images from 27.01.2019, left in natural colors, right bands 12,11,4, in which we notice a thermal anomaly - a click to agarndir

Tinakula - Sentinel2 images from 29.01.2019 bands 12,4,2

Tinakula - Sentinel2 images from 29.01.2019 bands 12,4,2

The Gunungapi Ibu, on Halmahera in the Moluccas, has a level 2 / waspada activity, with a 2 km forbidden zone, extended to 3.5 km on the north side.

Many gray-white plumes are reported up to 800 meters above the summit.

The seismicity of January 28 is characterized by 84 earthquakes of eruption, 81 earthquakes of blast, 25 earthquakes of avalanches, 13 episode of harmonic tremor, one of type tornilo.

 

Source: PVMBG and Magma Indonesia

Gunungapi Ibu - 28.01.2019 / 14:15 WIB - photo PVMBG / Magma Indonesia

Gunungapi Ibu - 28.01.2019 / 14:15 WIB - photo PVMBG / Magma Indonesia

JMA and VAAC Tokyo report an eruption in Kuchinoerabujoma on January 29, 2019 around 5pm local time. The Shindake plume rose to 2,800 meters asl at 5:14 pm to 5:16 pm, accompanied by a pyroclastic flow to the southwest for 600 meters.

 

Sources: JMA & VAAC Tokyo

Kuchinoerabujima on 29.01.2019, respectively at 17:14 and 17:16, where we can see a pyroclastic flow developping - JMA webcam
Kuchinoerabujima on 29.01.2019, respectively at 17:14 and 17:16, where we can see a pyroclastic flow developping - JMA webcam

Kuchinoerabujima on 29.01.2019, respectively at 17:14 and 17:16, where we can see a pyroclastic flow developping - JMA webcam

At Karangetang, at activity level 3 / Siaga on Siau Island, north of Sulawesi, emissions continue, white or gray, depending on the emitting craters.

For January 29, the PVMBG reports 70 avalanche earthquakes, 25 earthquakes of blast, 4 superficial and 4 deep volcanic earthquakes, and a continuous tremor of dominant amplitude at 0.25 mm.

The forbidden zone remains 2.5 km radius around the craters, extended 3 km to the northwest.

 

Source: PVMBG

Karangetang - white and gray plumes according to crater transmitter on 30.01.2019 / 05:51 WITA - webcam PVMBG / Magma Indonesia

Karangetang - white and gray plumes according to crater transmitter on 30.01.2019 / 05:51 WITA - webcam PVMBG / Magma Indonesia

At Merapi / Java, activity at the summit dome does not change. On January 29, 40 avalanche earthquakes, 3 low-frequency earthquake earthquakes and 2 hybrids were reported. The avalanches of incandescent blocks spread out over 50 to 1,400 meters.

The activity level remains at 2 / waspada.

 

Source: BPPTKG

Merapi - some avalanches of blocks on 29.01.2019 at 5:02, local time 20:17 and 21:39 - BPPTKG webcam - one click to enlargeMerapi - some avalanches of blocks on 29.01.2019 at 5:02, local time 20:17 and 21:39 - BPPTKG webcam - one click to enlargeMerapi - some avalanches of blocks on 29.01.2019 at 5:02, local time 20:17 and 21:39 - BPPTKG webcam - one click to enlarge

Merapi - some avalanches of blocks on 29.01.2019 at 5:02, local time 20:17 and 21:39 - BPPTKG webcam - one click to enlarge

Merapi - summary of activity at 29.01.2019 - Doc. BPPTKG

Merapi - summary of activity at 29.01.2019 - Doc. BPPTKG

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 The summit craters of Popocatépetl on 27.01.2019 - photos Cenapred & al.

The summit craters of Popocatépetl on 27.01.2019 - photos Cenapred & al.

An overflight of the crater of Popocatépetl was carried out on January 27th by the Cenapred teams, with the support of the Federal Police helicopter.

The inner crater has a diameter of 300 meters and a depth of 150 meters, with no visible dome. A slight emission of gas is observed during the overflight.

During the last 24 hours, 61 exhalations, with emissions of steam, gas and a little ash were observed; the associated plumes are between 200 and 500 m. tall, scattered to the east. In addition, 29 minutes of harmonic tremor of low amplitude were recorded.

Source: Cenapred

Popocatépetl - photos of the flyover of 27.01.2019 - photos Cenapred & al.
Popocatépetl - photos of the flyover of 27.01.2019 - photos Cenapred & al.

Popocatépetl - photos of the flyover of 27.01.2019 - photos Cenapred & al.

At Merapi, Java, seismicity is characterized by 17 block avalanches, a blast earthquake, a low frequency, a hybrid and three distant tectonic earthquakes.

The distance traveled by the incandescent flows varies between 300 and 350 meters.

Source: BPPTKG

Merapi - summary of the activity of 27.01.2019 - Doc. BPPTKG

Merapi - summary of the activity of 27.01.2019 - Doc. BPPTKG

Merapi - Incandescent blocks flow and degassing of the dome 27.01.2019 / 18h06 - photo BPPTKG

Merapi - Incandescent blocks flow and degassing of the dome 27.01.2019 / 18h06 - photo BPPTKG

At Etna, the ash emissions of the Bocca Nuova were less intense, and allowed the reopening of Catania airport on the morning of January 27 ... before resuming during the day.

Sources: Marco Restivo / EtnaWalk

Etna - ash emissions by the Bocca Nuova on 27.01.2019 - Marco Restivo / EtnaWalk photos
Etna - ash emissions by the Bocca Nuova on 27.01.2019 - Marco Restivo / EtnaWalk photos

Etna - ash emissions by the Bocca Nuova on 27.01.2019 - Marco Restivo / EtnaWalk photos

Etna - 27.01.2019 / 12:28 - LAVE webcam

Etna - 27.01.2019 / 12:28 - LAVE webcam

Activity has not resumed in Kilauea for a few months, where the lava is no longer visible on crack 8 since September 4 (GVP).

Isolated areas continue to degas, but the vegetation returns to life in the rift zone affected by the last eruptive phase.

An overflight was made by Bruce Omori and Paradise helicopters on January 25, and allows, through his photos, to realize the changes made to the landscapes.

Kilauea East Rift Zone - black sand beaches at Kapoho; the Kapoho crater is visible at the top right - photo Bruce Omori 25.01.2019

Kilauea East Rift Zone - black sand beaches at Kapoho; the Kapoho crater is visible at the top right - photo Bruce Omori 25.01.2019

Kilauea East Rift Zone - Pohoiky bay and its new volcanic sand beach pierced by some water bodies trapped - photo Bruce Omori 25.01.2019

Kilauea East Rift Zone - Pohoiky bay and its new volcanic sand beach pierced by some water bodies trapped - photo Bruce Omori 25.01.2019

Black sand beaches adorn Kapoho's sea inlet, while small water reservoirs dot the shoreline at Pohoiki Bay.

Kilauea East Rift Zone - restoration of access to the Puna geothermal venture and degassing on the line of cracks / crevices - photo Bruce Omori 25.01.2019
Kilauea East Rift Zone - restoration of access to the Puna geothermal venture and degassing on the line of cracks / crevices - photo Bruce Omori 25.01.2019

Kilauea East Rift Zone - restoration of access to the Puna geothermal venture and degassing on the line of cracks / crevices - photo Bruce Omori 25.01.2019

Access to the geothermal venture of ​​Puna, cut by lava flows, has been restored. The cracks still emit gas and vapor plumes, aligned in the Leilani Estates area.

Kilauea East Rift Zone - The Pu'u O'o Crater - Photo Bruce Omori 25.01.2019

Kilauea East Rift Zone - The Pu'u O'o Crater - Photo Bruce Omori 25.01.2019

Drastic changes mark the craters Halema'uma'u and Pu'u O'o, following their emptying, and their collapses.

The crater of Pu'u O'o, 320 meters deep under the rim, emits plumes of gas.

That of Halema'uma'u has completely changed and expanded; 450 meters deep, its diameter is now almost 1,600 meters. It also has small areas of degassing.

 

Source: Bruce Omori / Extreme Exposure Fine Art Gallery / Paradise Helicopters & Dane DuPont / Hawaii tracker
 

Kilauea summit caldeira, with the crater of Halema'uma'u; in the background, Mauna Kea; in the foreground on the right, the crater Keanakakoi - BO - photo Bruce Omori 25.01.2019

Kilauea summit caldeira, with the crater of Halema'uma'u; in the background, Mauna Kea; in the foreground on the right, the crater Keanakakoi - BO - photo Bruce Omori 25.01.2019

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Etna - 26.01.2019 - Emissions of ashes seen from Bronte - photo Marisa Liotta / via EtNative

Etna - 26.01.2019 - Emissions of ashes seen from Bronte - photo Marisa Liotta / via EtNative

Copious ash emissions continued at Etna on January 26, 2019: those responsible, the crater northeast and the Bocca Nuova, with fallout on the southeast side of the volcano.

Due to this eruption, air traffic was suspended at Fontanarossa airport in Catania from 26 at 1 pm until 27 at 11am.

 

Sources: Marisa Liotta / EtNative, EtnaWalk, Flightradar

Etna - 26.01.2019 / around 10h50 - ash emission - photos Marisa Liotta / via EtNative
Etna - 26.01.2019 / around 10h50 - ash emission - photos Marisa Liotta / via EtNative

Etna - 26.01.2019 / around 10h50 - ash emission - photos Marisa Liotta / via EtNative

Etna - 26.01.2019 - ash emissions and fallout - EtnaWalk photos

Etna - 26.01.2019 - ash emissions and fallout - EtnaWalk photos

The growth of the Merapi dome is linked on January 26 to 9 avalanche earthquakes , 3 blast earthquakes , 2 tectonic earthquakes and one of low frequency.

The south-easterly collapses on January 26 between 18h and 24 h, two in number, are characterized by a duration of 40 to 55 sec., observed on a course of 400 meters .

Between 0h and 18h ​​local on January 27, two avalanches are reported, with a duration of 38 sec. approximately, and a 300 meters course.

 

Source: PVMBG - BPPTKG

Merapi - 26.01.2019 - summary of activities - Doc. PVMBG - BPPTKG

Merapi - 26.01.2019 - summary of activities - Doc. PVMBG - BPPTKG

Merapi - incandescent avalanches on 26.01.2019 / 23h02 and 27.01.2019 / 01h02 - Doc. BPPTKG - one click to enlargeMerapi - incandescent avalanches on 26.01.2019 / 23h02 and 27.01.2019 / 01h02 - Doc. BPPTKG - one click to enlarge

Merapi - incandescent avalanches on 26.01.2019 / 23h02 and 27.01.2019 / 01h02 - Doc. BPPTKG - one click to enlarge

In Kamchatka, Sheveluch continues its activity: it is characterized by the continuous growth and incandescence of the dome, a strong fumarolic activity, and avalanches of blocks.

An ash plume is reported on January 26 at 4,000-4,500 meters asl, drifting east and southeast of the volcano for more than 280 km.

 

Sources: KVERT, VAAC Tokyo and Mirova

Sheveluch - Volcanic ash advisory 27.01.2019 / 0:00 Z - Doc VAAC Tokyo

Sheveluch - Volcanic ash advisory 27.01.2019 / 0:00 Z - Doc VAAC Tokyo

Sheveluch - thermal anomalies on 27.01.2019 / 01h50 - Doc. Mirova MODIS_Latest10NTI

Sheveluch - thermal anomalies on 27.01.2019 / 01h50 - Doc. Mirova MODIS_Latest10NTI

An eruption, probably phreatic, occurred on January 26 at 16:00 local time in Rincón de la Vieja, Costa Rica, lasting one minute.

The height reached by the column is unknown because of the visibility conditions of the site.

 

Source: Ovsicori

Rincon de La Vieja - the phreatic activity concerns the summit crater lake - photo archives Federico Chavarría-Kopper - Ovsicori

Rincon de La Vieja - the phreatic activity concerns the summit crater lake - photo archives Federico Chavarría-Kopper - Ovsicori

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Barren island - Volcanic ash advisory for 26 and 27.01.2019 - Doc.VAAC Darwin

Barren island - Volcanic ash advisory for 26 and 27.01.2019 - Doc.VAAC Darwin

Intermittent explosive activity continues on Barren Island, in the Andaman Islands.

VAAC Darwin reports intermittent ash emissions with a plume rising over 900 meters (Flight Level 030) traveling westward.

Low to moderate thermal anomalies are identified by Mirova on January 24 and 25, 2019.

This activity is part of a new eruptive phase started around September 25, 2018.

Sources: VAAC Darwin and Mirova
 

Location of Cleveland - AVO map

Location of Cleveland - AVO map

During the past week, little news from Cleveland, in the Aleutians.

The latest satellite observations of high surface temperatures date from January 19-20, before the views of the volcano are obscured by clouds. No explosion was recorded by the seismic station and the infrasonic system.

The aviation code remains orange, the possible explosions of the dome may present a danger for aviation.

Source: AVO

Incendie dans le Grand Brûlé- Imazpress 25.01.2019

The fire, whose cause remains undetermined, which began January 20 in the "Grand Brûlé", on the east flank of Piton de La Fournaise continues to progress this January 25.

More than 2,000 hectares of vegetation have gone up in smoke, and the flames are 200 meters from the RN2 linking St. Rose to St. Philippe; it was closed in both directions. This Saturday, January 26th, the fire has passed the other side of the road in two places, but remains under control.

Fanned by the winds, the fire is likely to spread further and reach homes and forest in Tremblet, with human and ecological consequences.

Piton de La Fournaise - fire in the "Grand Brûlé" seen on the webcam Cascades on 24.01.2019 / 6h39 UT - OVPF

Piton de La Fournaise - fire in the "Grand Brûlé" seen on the webcam Cascades on 24.01.2019 / 6h39 UT - OVPF

Piton de La Fournaise - fire in the "Grand Brûlé" on 25.01.2019 - photo Imazpress

Piton de La Fournaise - fire in the "Grand Brûlé" on 25.01.2019 - photo Imazpress

Piton de La Fournaise - the fire in the "Grand Brûlé" is nearing the RN2 on 25.01.2019 - photo Imazpress

Piton de La Fournaise - the fire in the "Grand Brûlé" is nearing the RN2 on 25.01.2019 - photo Imazpress

The fire also threatens GPS and seismological stations of the Piton de la Fournaise, equipment of between 20 and 25,000 euros. . Two of them are potentially under the threat of this disaster. The first is located 400 meters south of the fire. The second is further north and is more exposed to the threat of flames.
"We are still receiving data, which means that they are still out of danger," says Aline Peltier, director of the Volcanological Observatory of Piton de la Fournaise.

 

Sources: Imazpress, zinfos974 and Clicanoo - OVPF webcams

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Publié le par Bernard Duyck
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Manam - eruption in progress - Post Courier photos - one click to enlarge

Manam - eruption in progress - Post Courier photos - one click to enlarge

In Papua New Guinea, VAAC Darwin maintains the red aviation code for Manam.

The eruption started on January 23 (see yesterday's article) continued on the 24th (which is rare, the eruptions usually last only two hours); at high altitude, the ash cloud, which rises 16.7 km by 5 pm UTC, has dissipated, but at lower altitudes the ashes are moving eastwards.

Mirova detected a thermal anomaly of 13 MW on 24 January at 4:15.

The communication tower was destroyed, as well as the drinking water reserves rendered unusable; The three care centers are complete and can not accommodate more refugees ... residents are asking for immediate evacuation and long-term plans.

 

Sources: VAAC Darwin, Post Courier and Manam Resettlement Authority
 

Merapi - activity on 24.01.2019 - Doc. PVMBG

Merapi - activity on 24.01.2019 - Doc. PVMBG

The growth of the Merapi dome is continuing; the volume reached on January 22 is 461,000 m³, with a feeding rate of 1,300 m³ / day.

The seismic activity of January 24 is characterized by 28 avalanche earthquakes, a low frequency earthquake and a shallow volcanic earthquake.

The activity level remains at 2 / waspada, with a prohibited area of ​​3 km.

 

Source: PVMBG

Villarica - lava fountain from 24.01.2019 / 3:10 am - Doc. POVI

Villarica - lava fountain from 24.01.2019 / 3:10 am - Doc. POVI

The Villarica, in Chile, after three weeks of calm, finds again its lava fountains and strombolian explosions, with deposits of ash, lapilli and bombs of diameter up to 15 cm, measurements made during a reconnaissance in the land at mid-day. The height of the fountain of 24 January at 3:10 was 35 meters, ... a building of 10 floors.

The sulphurous gas plume extended in the afternoon of January 23 over 40 km to the northeast, before decreasing vigorously and the beginning of Strombolian activity.

 

Source: POVI

Poas - steam plumes of 24.01.2019, respectively at 7:17 and 11:38 - webcam Ovsicori
Poas - steam plumes of 24.01.2019, respectively at 7:17 and 11:38 - webcam Ovsicori

Poas - steam plumes of 24.01.2019, respectively at 7:17 and 11:38 - webcam Ovsicori

The crater of Poas, Costa Rica, presented during the day of January 24 a plume rich in steam (white) out of the mouth A / ancient dome.

Ovsicori does not report an eruption.

 

Source: Ovsicori

 San Cristobal – 24,01,2019 / 11h50 locale - INETER webcam

San Cristobal – 24,01,2019 / 11h50 locale - INETER webcam

In Nicaragua, ash emissions from San Cristobal remain constant. Without further comments from Ineter.

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Manam - 23.01.2019 - Photos de Kessy Sawang via Elizah Palme / via Shérine France

Manam - 23.01.2019 - Photos de Kessy Sawang via Elizah Palme / via Shérine France

Manam - 23.01.2019 - Photo deerekschen / Instagram / Twitter via Shérine France

Manam - 23.01.2019 - Photo deerekschen / Instagram / Twitter via Shérine France

A major eruption occurred at 2348 UTC on 23 January 2019 on Manam volcano in Papua New Guinea.

VAAC Darwin spotted the ash plume at a height of 12.2 km at 4:49 UTC, and changed the aviation code to red.

At 7:32, the height of the eruptive column was revised, based on the movement of plumes: at an altitude of 15.2 km, moving west, and 6 km, moving north and east .

According to Nasa Aqua / AIRS satellite data, a volume of 13 kt of sulfur dioxide was emitted, similar to other recent eruptions.

Update : The Chairman of the Manam Disaster Task Force and the Ward Member for Baliau have just called. Water sources and food gardens are completely destroyed.
There is an urgent need for temporary shelter on the continent. Need transportation for evacuation. 
(Elizah Palme / Twitter via Shérine France)

Sources: VAAC Darwin & AIRS, via Simon Carn

Manam - Volcanic Ash Advisory 23.01.2019 - Doc. VAAC Darwin

Manam - Volcanic Ash Advisory 23.01.2019 - Doc. VAAC Darwin

Manam - 23.01.2019 / 15h59 - 16h05 UTC - detection of sulfur dioxide by sat Nasa Aqua / AIRS - Doc. via Simon Carn

Manam - 23.01.2019 / 15h59 - 16h05 UTC - detection of sulfur dioxide by sat Nasa Aqua / AIRS - Doc. via Simon Carn

The University of Colima reports a slight increase in the passive degassing of the Colima volcano since 18 January.

Monitoring continues, and two scenarios are proposed for the coming days or weeks:

- Continuation of passive degassing, and possible low intensity explosions

- or, new growth of a summit lava dome, with collapse of incandescent materials and lava flows

To be continued ...

Source: RESCO-CUEV - Faculty of Ciencias University of Colima

 Volcán de Colima - photo 22.01.2019 via www.cabanasdelvolcan.mx

 Volcán de Colima - photo 22.01.2019 via www.cabanasdelvolcan.mx

At Etna, ash emissions from the northeast crater and Bocca Nuova continue; a few falls of ashes are reported on Pisano and Zafferana Etnea. The fallout of ash on the top of the volcano reveals a two-color landscape well sliced, black and white !

Boris Behncke points out that such activity, confined entirely to the summit craters, has nothing to do with seismic activity marking the flanks of Mount Etna.

Sources: Boris Behncke and Salvatore Lo Giudice

 Etna - ash emissions continue - photo Boris Behncke 23.01.2019

Etna - ash emissions continue - photo Boris Behncke 23.01.2019

The summit of Etna in black and white, following the proximal fall of ashes  - photo 23.01.2019 / Salvatore Lo Giudice

The summit of Etna in black and white, following the proximal fall of ashes  - photo 23.01.2019 / Salvatore Lo Giudice

On Bali, an earthquake of eruption is reported by the PVMBG for January 23 at Agung, as well as two blast events.

The lack of visibility of the summit does not allow the observation of a possible plume.

Sources: PVMBG & Magma Indonesia

Agung - seismogram of 23.01.2019 - Doc. Magma Indonesia

Agung - seismogram of 23.01.2019 - Doc. Magma Indonesia

In the East Rift Zone of Kilauea / Hawaii, in the "absence of magma", some residents had to leave their Ala Ili road house, above Leilani Estates, as a result of overheated steam emissions.

The cracks have forced the residents of the neighborhood to leave at least three houses so far, and several others are threatened.

Beverly Vance left on January 13th after the temperature below her house reached 62 degrees Celsius and the steam began to spout out of the sump vent pipe.

On January 5th, she noticed that steam was rising around a mandarin tree in her garden. She measured the temperature around her base at 119.3 degrees. A week later, the temperature under the tree was 148 degrees. As of Thursday, it was 160.

Christina Neal, the HVO scientist in charge, said after monitoring the area despite the shutdown, there was "certainly no sign of magma approaching the surface there."

"The fracture zone is still adjusting," she said. "Crack is not too surprising."

Source: Honolulu Civil Beat

Kilauea East rift zone - crevasses in a swamp on Ali Ili road - photo Alan McNarie - Honolulu Civil Beat / 23.01.2019

Kilauea East rift zone - Steam rises from a huge crack in the meadow behind Beverly Vance’s house on Ala Ili Road. - photo Alan McNarie - Honolulu Civil Beat / 23.01.2019

Kilauea East rift zone - Steam rises from a huge crack in the meadow behind Beverly Vance’s house on Ala Ili Road. - photo Alan McNarie - Honolulu Civil Beat / 23.01.2019

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Publié le par Bernard Duyck
Publié dans : #volcanic activity

A strong explosion marked Popocatépetl on January 22, 2019 at 9:06 pm; it was accompanied by incandescent projections over 2 km on the north-east flank, and a plume of ash and gas observed at 3,000 meters above the crater.

Popocatepetl - seismogram of the explosion of 22.01.2019 / 21h06 - Doc. CENAPRED


The ashes dispersed to the northeast with spillovers in this area.

Popocatépetl - eruptive sequence from 22.01.2019, between 21h06 and 21h08 - Webcams from Mexico / Cenapred - one click to enlargePopocatépetl - eruptive sequence from 22.01.2019, between 21h06 and 21h08 - Webcams from Mexico / Cenapred - one click to enlargePopocatépetl - eruptive sequence from 22.01.2019, between 21h06 and 21h08 - Webcams from Mexico / Cenapred - one click to enlarge
Popocatépetl - eruptive sequence from 22.01.2019, between 21h06 and 21h08 - Webcams from Mexico / Cenapred - one click to enlarge

Popocatépetl - eruptive sequence from 22.01.2019, between 21h06 and 21h08 - Webcams from Mexico / Cenapred - one click to enlarge

The last 24 hours had been characterized by 94 exhalations of steam, gas and a little ash. At the seismicity level, 68 minutes of harmonic tremor and two volcanoteconic earthquakes at 15:53 ​​/ M2,3 and 20:16 / M1,9 were recorded.

The activity remains under the Amarillo volcanic alert semaphore fase 2.

Source: Cenapred & WebcamsdeMexico

Sheveluch - incandescence of the dome - photo Volkstat 16.01.2019

Sheveluch - incandescence of the dome - photo Volkstat 16.01.2019

At Sheveluch, Kamchatka, the lava dome extrusion continues, with strong fumarolic activity, avalanches and night glow. The plume of gas and steam, a little charged with ashes, reached a height of 3,500 - 4,000 meters drifting west of the volcano west 52 km on 22 January.

On January 23, the KVERT reports a 4.500-meter plume drifting southwest.

The aviation code remains orange, with the possibility of ash explosions, with a plume reaching 10-15 km in height.

 

Sources: KVERT & VAAC Tokyo.

Sheveluch - Volcanic Ash Advisory for 22 and 23.01.2019 - Doc. VAAC Tokyo - one click to enlargeSheveluch - Volcanic Ash Advisory for 22 and 23.01.2019 - Doc. VAAC Tokyo - one click to enlarge

Sheveluch - Volcanic Ash Advisory for 22 and 23.01.2019 - Doc. VAAC Tokyo - one click to enlarge

In Fuego, Guatemala, according to information from INSIVUMEH, activity has increased due to the crater filling process, and there are moderate explosions that generate audible rumblings.

Fuego - RSAM of 22.01.2019 / 3h local - Doc. INSIVUMEH


On January 22, the activity is maintained with 15 -25 low to high explosions, per hour, a plume of ash amounting to 4,800 m asl. before dispersing to the west and south-west, and incandescent impulses 100-300 meters above the crater.

Ash falls are reported on Panimaché I y II, Morelia, Santa Sofía, Yepocapa.

 

Sources: Insivumeh & Conred

Activity of Popocatépetl, Sheveluch, Fuego and Etna.
Fuego - 22.01.2019 / 9h loc - Photo Insivumeh

Fuego - 22.01.2019 / 9h loc - Photo Insivumeh

Fuego - 22.01.2019 - photo Conred

Fuego - 22.01.2019 - photo Conred

At Etna, ash emissions follow one another on January 22nd at two summit craters, the Northeast crater and the Bocca Nuova

A note from Prof. Carmelo Ferlito announces the opening of a new mouth in the central crater; it is about 40 meters northwest of the small gouffre opened in August 2016, and emits bluish gases, and is likely incandescent during the night.

 

Sources: Boris Behncke and Carmelo Ferlito, via EtnaWalk

Etna - plume of ashes on 22.01.2019 - photo Boris Behncke

Etna - plume of ashes on 22.01.2019 - photo Boris Behncke

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