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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
 The Sinabung and the reservoir on the Lauborus River - photo 17.11.2018 Sadrah Peranginangin

The Sinabung and the reservoir on the Lauborus River - photo 17.11.2018 Sadrah Peranginangin

The current activity of the Sinabung, always on maximum alert, is relatively low: a weak white plume rises 200 meters above the summit.

This November 17, the PVMBG informs 4 emission earthquakes and a distant tectonic earthquake.

The Sinabung , with fumaroles in the Lauborus river - photo 17.11.2018 Sadrah Peranginangin

The Sinabung , with fumaroles in the Lauborus river - photo 17.11.2018 Sadrah Peranginangin

Sinabung - 17.11.2018 - the reservoir begins to drain ... risks of lahars - photo Sadrah Peranginangin

Sinabung - 17.11.2018 - the reservoir begins to drain ... risks of lahars - photo Sadrah Peranginangin

But the danger is present ! It comes from the new dam lake formed on the upper course of the Laborus River.

BPBD in the Karo region has issued a lahar threat to residents around the river living or working downstream of the dam.

Sadrah Peranginangin reports that the lake level has dropped about 3 meters and continues to fall, with risk of lahar, without rainwater.

Local authorities continue their local information work.

Let's hope that everything is going well for the local population.

Sources: PVMBG and communication by Sadrah Peranginangin.

Suwanosejima - 15.11.2018 - JMA / NHK photo

Suwanosejima - 15.11.2018 - JMA / NHK photo

An explosive eruption took place on 15 November from 15:52 in the Ontakeake of Suwanosejima; the associated plume reached 2,000 meters above the crater.

Despite the lack of data on inflation and the increase in seismicity, the JMA indicates a possibility of eruption of the same magnitude in the future, and advises against the approach of the crater.

Source: NHK

Fuego - thermal anomaly from 18.11.2018 to 05:05 - Doc.Mirova MODIS_VRP

Fuego - thermal anomaly from 18.11.2018 to 05:05 - Doc.Mirova MODIS_VRP

The activity of Fuego is again rising: 8 to 14 explosions, low to moderate, per hour are accompanied by emission of plumes of ash to 4,700 meters asl., drifting on 15-20 km to the southwest and west.

Incandescent pulsatile emissions at 150-200 meters are observed, as well as moderate avalanches in the crater contour. A lava flow reaches a length of 1,300 meters in the Ceniza barranca, permanently fed.

Ash falls are reported on Panimache I, Morelia, Santa Sofia, Sangre de Cristo, Finca Palo Verde.

Fuego - sismo and RSAM 17.11.2018 - Doc Insivumeh

Source: Insivumeh
 

Etna - 17.11.2018 / 19h50 - photo Benito Morabito

Etna - 17.11.2018 / 19h50 - photo Benito Morabito

Etna - summit activity 17.11.2018 / 20h59 - webcam LAVE

Etna - summit activity 17.11.2018 / 20h59 - webcam LAVE

The summit activity of Etna continues, illustrated by the images of the webcam LAVE and from Benito Morabito.

 

Etna - 17.11.2018 / 20h25 - photo Benito Morabito

Etna - 17.11.2018 / 20h25 - photo Benito Morabito

Etna - summit activity 17.11.2018 / 21h59 - webcam LAVE

Etna - summit activity 17.11.2018 / 21h59 - webcam LAVE

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Sangay - 16.11.2018 / 05h25 - falling of incandescent blocks - photo IGEPN / ECU 911

Sangay - 16.11.2018 / 05h25 - falling of incandescent blocks - photo IGEPN / ECU 911

Incandescent blocks rolling on the flank of the Sangay volcano are visible on the webcam image ecu911. This activity, of low intensity, is associated with the viscous lava outlet of the Ñuñurcu Dome. It does not currently present any risks

Sources: Videovigilancia ECU 911 / IGEPN via Benjamin Bernard, VAAC Washington.

Sangay - aerial photo by Patricio Ramon / IG

Sangay - aerial photo by Patricio Ramon / IG

In Villarica, the POVI reports, on November 15, the presence of a small pyroclastic cone at the bottom of the crater, with a lateral opening about ten meters in diameter, and inclined at 50 ° towards the inner wall of the crater.

On November 16th, some majestic Strombolian explosions are observed, which expel lava flakes on the western edges of the crater.

Source: POVI / Twwitter

Villarica - 16.11.2018 / 02:24 - Strombolian explosions with expulsion on the western edge of the crater - photo POVI

Villarica - 16.11.2018 / 02:24 - Strombolian explosions with expulsion on the western edge of the crater - photo POVI

In Krakatau, the activity is maintained, with a rhythm of 4-5 eruptions accompanied by ash plumes, traveled by lightning, in two hours, according to the observation of Oystein Lund Andersen from the coast.

The PVMBG reports, for the day of November 16, 236 eruptions earthquakes, 59 emission earthquakes, 43 shallow volcanic earthquakes, one harmonic tremor episode and a continuous tremor of dominant amplitude at 5 mm.

The activity level remains at 2 / waspada, with a forbidden area of ​​2 km radius around the crater.

Sources: PVMBG & Oystein Lund Andersen

Anak Krakatau - 17.11.2018 / 12:50 local - photo Oystein Lund Andersen

Anak Krakatau - 17.11.2018 / 12:50 local - photo Oystein Lund Andersen

Anak Krakatau - image Sentinel 2 SWIR from 16.11.2018 - one click to enlarge

Anak Krakatau - image Sentinel 2 SWIR from 16.11.2018 - one click to enlarge

The new lava dome of Merapi continues to grow; it reached a volume of 290,000 cubic meters on November 15, with a growth rate, that has been falling since November 7, of 2,400 cubic meters per day.

According to the PVMBG, the dome is in a stable position, despite the extension of a lateral lobe.

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

For the day of November 16th, 30 collapse earthquakes and 11 emission earthquakes are counted. A white plume is observed rising up to 50 meters above the summit, and dispersing towards the NSN.

Source: PVMBG

Merapi - evolution of the dome between 7 and 15.11.2018 - Doc.PVMBG

Merapi - evolution of the dome between 7 and 15.11.2018 - Doc.PVMBG

The Volcanological and Seismological Observatory of Guadeloupe recorded a sequence of 78 volcanic earthquakes on Monday of magnitude 1, not felt by the population. The hypocentre is located 2.5 km deep under the summit of the cone of La Soufrière.

Source: RCI

 La Soufrière summit - Guadeloupe archives 114

La Soufrière summit - Guadeloupe archives 114

The Soufrière of Guadeloupe - simplified structural map IPGP

The Soufrière of Guadeloupe - simplified structural map IPGP

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Veniaminof - ash plume - photo Zachary Finley / AVO from 09.11.2018 / 14h58 AKST

Veniaminof - ash plume - photo Zachary Finley / AVO from 09.11.2018 / 14h58 AKST

At Veniaminof, the eruption continues, with minor spattering, and the effusion of lava that fed an intracalderic flow. Seismic tremor of low amplitude marks this activity.

A plume containing ash in low concentration extends from the summit for 48 km. to the northwest of the volcano.

The volcano is under surveillance of a seismic network, and local infrasonic, and satellite monitoring.

 

Sources: AVO & Nasa.

Veniaminof - RSAM from 11 to 16.11.2018 - and RSAM from 15.11.2018 - Doc. AVO
Veniaminof - RSAM from 11 to 16.11.2018 - and RSAM from 15.11.2018 - Doc. AVO

Veniaminof - RSAM from 11 to 16.11.2018 - and RSAM from 15.11.2018 - Doc. AVO

Veniaminof -image VIIRS bands day and night of 15.11.2018, revealing the lights of Anchorage, Fairbanks and Juneau, as well as the incandescence of the ongoing eruption at Veniaminof. - Doc. VIIRS Nasa

Veniaminof -image VIIRS bands day and night of 15.11.2018, revealing the lights of Anchorage, Fairbanks and Juneau, as well as the incandescence of the ongoing eruption at Veniaminof. - Doc. VIIRS Nasa

The daily reports of Phivolcs concerning the Mayon follow one another, suggesting a slight increase in activity.

In recent days, a daily volcanic earthquake is reported, as well as nighttime glow. Moderate emissions of white plumes of steam and gas are observed, as well as inflation in the southeast and mid-slope sectors. Sulfur dioxide emissions were measured at 1,196 tonnes / day on November 14, 2018.

The Mayon remains alert level 2, with the recommendation not to penetrate an area of ​​6-7 km radius, depending on the axes considered.

 

Source: Phivolcs

Mayon and his perfect cone - photo Thomas Tam via Wiki

Mayon and his perfect cone - photo Thomas Tam via Wiki

In Guatemala, the weather conditions of strong winds affecting volcanic areas remobilize ashes deposited by the activity of volcanoes, with ash dispersal and avalanches of blocks on the slopes of Fuego, Pacaya and Santiaguito volcanoes.

The insivumeh recalls that, despite appearances, these volcanoes maintain an activity within the set limits.

Sources: Insivumeh & Conred.

Santiaguito - 15.11.2018 - block avalanche and remobilization of fine particles under strong winds - photo Conred

Santiaguito - 15.11.2018 - block avalanche and remobilization of fine particles under strong winds - photo Conred

Fuego - 15,11,2018 / 10:15 - remobilization of deposited materials in the Las Lajas barranca by strong winds - photo OVFGO

Fuego - 15,11,2018 / 10:15 - remobilization of deposited materials in the Las Lajas barranca by strong winds - photo OVFGO

In Indonesia, the PVMBG reports an eruptive episode of Anak Krakatau on November 16, 2018 at 5:24 am WIB, accompanied by a thick plume of black ash about 600 meters above the summit, leaning to the northeast. This eruption is recorded on a seismogram of maximum amplitude of 58 mm and a duration of ± 3 minutes 32 seconds.

Emissions of ash continue.

Currently, G. Anak Krakatau is in level II status (Waspada) with a 2 km radius prohibited area around the crater and an orange VONA renewed this 16.11.

The seismicity of November 15 was characterized by 221 eruptions earthquakes, 79 emission earthquakes, 3 harmonic tremor episodes and a continuous tremor of dominant amplitude at 6 mm.

Sources: PVMBG & Magma Indonesia

Anak Krakatau - ash plume from 16.11.2018 / 12h55 loc. - PVMBG webcam

Anak Krakatau - ash plume from 16.11.2018 / 12h55 loc. - PVMBG webcam

Anak Krakatau - image Sentinel-2 SWIR  14.11.2018 - one click to enlarge

Anak Krakatau - image Sentinel-2 SWIR 14.11.2018 - one click to enlarge

Etna currently has four active summit vents, the northeast crater, the Bocca Nuova where two vents are present, and the Puttusiddu of the new southeastern crater.

Sources: observers cited.

Degassing at Etna on 15.11.2018; on the left, the Bocca Nuova, on the right, the south-east complex, and the north-east emissions, hidden. - photo Gio Giusa

Degassing at Etna on 15.11.2018; on the left, the Bocca Nuova, on the right, the south-east complex, and the north-east emissions, hidden. - photo Gio Giusa

Etna - beautiful sunset reflecting on the gas plume 15.11.2018 - photo Turi Caggegi

Etna - beautiful sunset reflecting on the gas plume 15.11.2018 - photo Turi Caggegi

Northeast crater of Etna - 14.11.2018 - video Michele Mammino Da quota 3325 mt

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
Sakurajima - 14.11.2018 - Asahi Shimbun photo

Sakurajima - 14.11.2018 - Asahi Shimbun photo

Sakurajima - 14.11.2018 - photo Naoto Yoshidome / Twitter

Sakurajima - 14.11.2018 - photo Naoto Yoshidome / Twitter

After a lull of a few weeks, the Sakurajima erupted on November 13 at 0:43 JST; the episode of the Minamidake upper vent was abrupt and significant with pyroclastic fallout on the flanks, and the emission of a plume, traveled with lightning at first, then expanding to 4,000 meters. Ashes are reported on Tarumi and Kanoya.

According to the local observatory, slight deformations were observed from 10 November.

VAAC Tokyo has issued some 7 ash dispatches since.

The JMA maintains alert level 3, in effect since February.

Sources: JMA, KTS and VAAC Tokyo.

Sakurajima - 13.11.2018 - Volcanic Ash advisory - Doc. VAAC Tokyo

Sakurajima - 13.11.2018 - Volcanic Ash advisory - Doc. VAAC Tokyo

During the week of November 5 to 11, Sabancaya saw a decline in activity, with an average of 18 explosions a day, and ash plumes rising to 3,700 meters.

Thermal anomalies are measured between 2 and 29 MW; sulfur dioxide emissions remain significant.

The alert level remains in Naranja.

Source: IG Peru

Sabancaya - activity from 5 to 11.11.2018 - Doc. IG Peru

Sabancaya - activity from 5 to 11.11.2018 - Doc. IG Peru

At Pacaya in Guatemala, seismicity is characterized by internal tremor associated with the rise of magma and gases; Strombolian explosions are standing with bomb ejections 5-25 meters above Mackenney crater and a lava flow that reaches 200 meters in a northwesterly direction. A white degassing is observed meanwhile, with a plume rising to 400 meters in height.

Source Insivumeh 13,11,2018

Pacaya - 12.11.2018 - photo Conred

Pacaya - 12.11.2018 - photo Conred

In Iceland, a seismic swarm marked the Bárðarbunga on 13 November; there will be two earthquakes of magnitude 3+ in the northeastern part of the volcanic field ... an earthquake of M 3.6 at a depth of 10 km at 19:01, followed two minutes later, by another of M 3, 3 to a depth of 3 km. They were followed by a dozen replicas.

The IMO does not report immediate signs of volcanic activity, as seismic activity remains as part of ongoing geological processes.

Sources: IMO & Iceland Mag.

Bardarbunga - 13.11.2018 / 15:45 - Doc. IMO
Bardarbunga - 13.11.2018 / 15:45 - Doc. IMO

Bardarbunga - 13.11.2018 / 15:45 - Doc. IMO

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Fumerolles on Mount Meager - photo cbc.ca

Fumerolles on Mount Meager - photo cbc.ca

A volcanologist at Simon Fraser University in Burnaby, British Columbia, Williams-Jones, reports alarming landslide or lahar signs following a possible collapse of a glacier over Mount Meager.

Mount Meager is one of the last erupting volcanoes on Canada's soil. The summit of this complex, belonging to the Garibaldi volcanic field, consists of overlapping andesitic lava flows and young dacitic flows and domes; the most recent activity dates back to 410 +/- 200 years BC, and produced a huge eruption of VEI 5 ​​associated with a flow of ash and blocks from a vent located on the northeast flank of Plinth peak.

Eruptive history of the volcanic complex of Mount Meager - Doc. Geologichazards in British Columbia

Eruptive history of the volcanic complex of Mount Meager - Doc. Geologichazards in British Columbia

Volcanoes of western Canada - Doc. USGS

Volcanoes of western Canada - Doc. USGS

Discovered two years ago, holes formed in the glacier, and fumaroles of a mixture of steam and toxic gases, H2S and CO2, emanate from it.

According to the team of volcanologists, "this great mountain is rotten ... gas and acidic fluids crossed the rock and made it brittle". The current study focuses not only on fumaroles, but also on the speed of retreat of the glacier and the risk of landslides, likely to trigger an eruption.

The risk of eruption is not immediate, but potential landslides threaten the Pemberton Valley and these 5,300 inhabitants.

Mt Meager - Holes and fumaroles on the Job Glacier 20.08.2016 - photo Dr. Russell / courtesy NRCAN

Mt Meager - Holes and fumaroles on the Job Glacier 20.08.2016 - photo Dr. Russell / courtesy NRCAN

2018 Field Tour on Mount Meager - Characters Give the Scale - Photo Chris Corday / cbc, ca

2018 Field Tour on Mount Meager - Characters Give the Scale - Photo Chris Corday / cbc, ca

The discovery of an ice cave highlights the growing instability of the volcano, worsening due to global warming, and the need for continuous monitoring and alarm systems. A call for funds has been made to the public since the federal government has not provided funding to date. It should be remembered that in 2010, nearly 50 million cubic meters of rock became detached and traveled 13 kilometers, destroying roads and bridges in passing.

The next alert may be more important.

Sources:

- Over the volcano - Warning signs emerge from the shrinking atop glacier B.C.'s Mount Meager - link

- Global Volcanism Program - Meager

- Georisk - Hazard and risk from large landslides from Mount Meager volcano, British Columbia, Canada - link
 

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Merapi - the visible dome from the valley, degassing on November 11, 2018 - photo Oystein Lund Andersen

Merapi - the visible dome from the valley, degassing on November 11, 2018 - photo Oystein Lund Andersen

At Merapi, the dome of the volcano continues to grow; the latest measurements taken by the BPPTKG on 7 November give a volume of 273,000 m³, and an average growth rate of 3,500 m³ / day.

The dome, cleared on November 11 in the morning, was clearly visible from the valley, degassing in the notch of the summit.

The observatory considers it as currently stable, and the level of activity is maintained at 2 / waspada, with a forbidden zone of 3 km radius ... to be respected imperatively, if one refers to the history of activity of the volcano which testify the traces left in 2010 by the killing pyroclastic flows and lahars.

Merapi - Morphological changes of the summit between 02.06.2018 and 11.11.2018 - photos Oystein Lund Andersen

Merapi - Morphological changes of the summit between 02.06.2018 and 11.11.2018 - photos Oystein Lund Andersen

Merapi - dome growth between 31 October and 7 November - Doc. PVMBG / BPPTKG

Merapi - dome growth between 31 October and 7 November - Doc. PVMBG / BPPTKG

The explosive activity of Krakatau justified an orange VONA this November 10, 2018 (at 15:15 WIB), following the emission of an ash plume about 800 meters above the summit, dispersing towards the north.

On November 11, the PVMBG reported a plume of ash about 300-600 meters above the summit, under a fog cover.

The seismicity of the day is characterized by 153 eruptions, 175 emission earthquakes, and a dominant amplitude tremor at 5 mm.

The activity level is 2 / waspada, with a 2 km radius prohibited area around the crater.

Sources: PVMBG, BPPTKG, Oystein Lund Andersen, Gunung Bagging.

The Anak Krakatau seen from Rakata - picture Dan Quinn 10.11.2018

The Anak Krakatau seen from Rakata - picture Dan Quinn 10.11.2018

Anak Krakatau - seismicity on 10.11.2018 - Doc.Magma Indonesia

Anak Krakatau - seismicity on 10.11.2018 - Doc.Magma Indonesia

Alert level 2 currently prevails on the Mayon volcano, corresponding to a moderate level of agitation.

A small plume of brown ash, associated with outgassing, was observed briefly around 7:39 am today near the summit area, drifting southwest. There were no seismic or infrasonic recordings corresponding to this event.

A moderate emission of vapor-laden white plumes was then observed, which slid downward before moving southwest, west-southwest and west-northwest.

Nighttime glow is observed.

Emissions of sulfur dioxide (SO2) are measured at 2,281 tonnes per day on November 11, 2018.

Precise leveling data obtained on October 22 and 31, 2018 indicate building inflation in the southeast sector, while the northern sector indicates short-term deflation from August 30 to September 3, 2018. The volcano generally remains Inflation over baselines in 2010. The electronic inclination data also show steep average slope inflation from June 25, 2018, likely due to an aseismic intrusion of magma.

 

Source: PHIVOLCS 12.11.2018 / 9.45 local time.

Mayon - early February 2018 activity - photo archives Thierry Sluys

Mayon - early February 2018 activity - photo archives Thierry Sluys

Kuchinoerabujima - image Sentinel-2 image bands 12,11,4 / 08.11.2018 - one click to enlarge

Kuchinoerabujima - image Sentinel-2 image bands 12,11,4 / 08.11.2018 - one click to enlarge

Kuchinoerabujima activity, in the Ryuku Islands in south of Japan, appears to have been gradually increasing since October; ash plumes are emitted about 2 km from the Shintake crater.

Pyroclastic flows are possible towards the coast, and the danger zone is to be avoided.

The alert level remains at 3 / do not approach the volcano.

Source: JMA.

Kuchinoerabujima - 11.11.2018 / 14h - JMA webcam

Kuchinoerabujima - 11.11.2018 / 14h - JMA webcam

Etna - intense degassing on 05.11.2018 / 10:15 GMT - photo J.Nasi / Butterfly Helicopters

Etna - intense degassing on 05.11.2018 / 10:15 GMT - photo J.Nasi / Butterfly Helicopters

Etna currently has four active summits, visualized on the Sentinel 2 image of 9 November by their radiative power at the northeastern crater, at Bocca Nuova where two vents are present, and at the "Puttusiddu" of the new southeastern crater.

Sources: Boris Behncke, Gio Giusa, Joseph Nasi, Sentinel 2.

Etna, the Bocca Nuova on 09.11.2018 - the crater of 1968 in the foreground, the crater of 1964 on the right - photo Gio Giusa

Etna, the Bocca Nuova on 09.11.2018 - the crater of 1968 in the foreground, the crater of 1964 on the right - photo Gio Giusa

Etna hot spots - image Sentinel-2 image bands 12,11,4 from 09.11.2018 and zoom. - one click to enlarge
Etna hot spots - image Sentinel-2 image bands 12,11,4 from 09.11.2018 and zoom. - one click to enlarge

Etna hot spots - image Sentinel-2 image bands 12,11,4 from 09.11.2018 and zoom. - one click to enlarge

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Ebeko - eruptive plume of 21.08.2018 / 23:22 GMT - photo Roskosmos / IVS

Ebeko - eruptive plume of 21.08.2018 / 23:22 GMT - photo Roskosmos / IVS

A moderate explosive activity continues in Ebeko, with this November 10 a plume of ashes to more than 4,500 meters asl., then drifting to the southeast on 10 km.

Ash explosions can occur at any time, and affect Severo-Kurilsk airport.

The aviation code remains orange.

Source: KVERT.

Anak Krakatau - Sentinel image 2 bands 12,11,4 from 06.11.2018

Anak Krakatau - Sentinel image 2 bands 12,11,4 from 06.11.2018

In Krakatau, an orange VONA has been in effect since November 9 at 17:15 WIB following the eruptive plume emitted at about 638 m asl. / 300 m above the summit.

The seismicity of November 9 is marked by 201 eruption earthquakes, 39 emission earthquakes, 43 shallow volcanic earthquakes and 3 deep volcanic earthquakes; the tremor at a dominant amplitude of 5 mm and max. 32 mm.

The PVMBG reported an eruption on November 10th at 9:39 am WIB, which was accompanied by a thick, black ash plume 500 meters above the summit, then northward drifting. The eruption lasted 47 seconds and left a seismogrammic imprint with an amplitude of 58 mm.

The alert remains at level 2 / waspada, with a 2km forbidden zone.

Source: PVMBG

Anak Krakatau - seismicity at 09.11.2018 - Doc.Magma Indonesia

Anak Krakatau - seismicity at 09.11.2018 - Doc.Magma Indonesia

At the Piton de La Fournaise, the cone of the last eruption, from September 15 to November 1, was named after the writer and storyteller Creole Daniel Honoré, who died on October 18, 2018 at the age of 79 years.

Piton de La Fournaise - the now " Piton Honoré " - photo archives 21.09.2018 (© OVPF-IPGP)

Piton de La Fournaise - the now " Piton Honoré " - photo archives 21.09.2018 (© OVPF-IPGP)

This name has consensus between the Piton de La Fournaise Observatory, the Reunion National Park and the City of the volcano ... the volcano has indeed animated the work of the writer: one of his tales " Dream on a volcano ", which depicts two famous people of the island, Madame Desbassyns, industrial and owner of slaves, and Grandmother Kalle, mythical character supposed to be a former slave, narrates the dream of the hero wanting to achieve the reconciliation of a whole people, and celebrate living together in Reunion.

Sources: OVPF, Clicanoo, Imazpress

Piton de La Fournaise - the now " Piton Honoré " - photo archives 02.10.2018 (© OVPF-IPGP)

Piton de La Fournaise - the now " Piton Honoré " - photo archives 02.10.2018 (© OVPF-IPGP)

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Publié le par Bernard Duyck
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Fuego - beautiful explosion - photo Bynomads.nl / via Clima Guatemala

Fuego - beautiful explosion - photo Bynomads.nl / via Clima Guatemala

The effusive activity of the Fuego continues; the lava flow in the Ceniza barranca reaches a length of 1 200 meters, and in its trajectory, a rise of fine particles is observed. Avalanches are described in the direction of Las Lajas and Honda barrancas.

Low to moderate explosions ranged from 12 to 18 per hour, with ash plumes rising to 4,600-4,700 meters asl, before dispersing over 10-15 km. towards a western sector, with fallout of fine particles on this zone, including Sangre de Cristo, Santa Sofia, Panimaché I and II, Finca Palo Verde, El Porvenir. The explosions are accompanied by outgassing noises for 2 to 5 minutes.

Fuego - Earthquake and RSAM of 08.11.02018 - Insivumeh

 

At Pacaya, the lava flow reaches about 300 meters, towards Cerro Chino.

Tremor is associated with degassing and explosions, as well as fallout around the Mackenney cone.

The thermal anomaly remains moderate, semon Mirova, included 08.11 between 30 and 35 MW.

 

Source: Insivumeh & Mirova.

Pacaya - Lava flow sneakering on the slopes - photo 07.11.2018 / Clima Guatemala / alexontrails

Pacaya - Lava flow sneakering on the slopes - photo 07.11.2018 / Clima Guatemala / alexontrails

In Sheveluch, the KVERT reports explosions generating an ash plume at more than 7,000 meters this November 9 from 3:10 UTC, drifting northeast of the volcano.

The aviation code is orange.

Sources: KVERT & VAAC Tokyo.

Sheveluch - volcanic Ash Advisory 09.112018 / 06h - Doc. VAAC Tokyo

Sheveluch - volcanic Ash Advisory 09.112018 / 06h - Doc. VAAC Tokyo

The Strombolian activity of Mount Etna is observed on the evening of November 8 at both the northeast and southeast crater.

Sources: Michele Mammino and Benito Morabito.

Etna - strombolian activity at craters NE and SE - photo Michele Mammino

Etna - strombolian activity at craters NE and SE - photo Michele Mammino

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 Complex Planchon Peteroa - 07.11.2018 / 10h24 loc. Radio Pumaiten

Complex Planchon Peteroa - 07.11.2018 / 10h24 loc. Radio Pumaiten

The Sernageomin informs of an emission of particulate materials to the Volcanic Complex Planchon-Peteroa this 7 November at 10:24 local (1324 GMT); the plume reached 1,000 meters of altitude, dispersing towards the ESE. The episode did not give significant precursor seismic signals.

Emissions continued during the day.

Due to the context, it fits into the current alert level: Amarillo technical alert.

In its October situation, the observatory does not provide any information about distortions or sulfur dioxide emission anomalies. Some particulate matter emissions are reported on 13, 14 and 15 October at about 600 meters above sea level. active crater.

The last eruption of the complex is dated 2010-2011, following the Maule earthquake (link to the GVP report)

Source: Sernageomi / OVDAS & Radio Pumaiten

Complex Planchon Peteroa - 07.11.2018 / 10h24 loc. and around 17h GMT - webcam Sernageomin (we regret the lack of time on images!) - one click to enlarge Complex Planchon Peteroa - 07.11.2018 / 10h24 loc. and around 17h GMT - webcam Sernageomin (we regret the lack of time on images!) - one click to enlarge

Complex Planchon Peteroa - 07.11.2018 / 10h24 loc. and around 17h GMT - webcam Sernageomin (we regret the lack of time on images!) - one click to enlarge

The activity of Nevados de Chillan was marked yesterday November 7 by an explosion and an earthquake associated with 11:24; a plume of ashes rose to 1,500 meters.

Nevados de Chillan - sismogram of the explosion of 07.11.2018 / 11:24

At 23:03 local time, a vigorous explosion again occurred, associated with an LP earthquake related to the dynamics of internal fluids; Incandescent blocks were ejected hundreds of meters from the point of emission ... probably a more or less significant destruction of the lava dome

Sources: Sernageomin & Volcanes de Chile.

Nevados of Chillan - 07.11.2018 / respectively at 02:03 and 02:08 - webcam Sernageomin / Volcanoes of Chile
Nevados of Chillan - 07.11.2018 / respectively at 02:03 and 02:08 - webcam Sernageomin / Volcanoes of Chile

Nevados of Chillan - 07.11.2018 / respectively at 02:03 and 02:08 - webcam Sernageomin / Volcanoes of Chile

At Veniaminof, the eruption continues with the emission of a westward drifting plume of ash and an outpouring of lava that feeds a 1.1 km long flow, characterized by a high surface temperature. Low amplitude tremors are recorded continuously.

Veniaminof - 05.11.2018 / 22:26 UTC - Worldview-2 images in false colors - Dietterich, Hannah via AVO - one click to enlarge

Veniaminof - 05.11.2018 / 22:26 UTC - Worldview-2 images in false colors - Dietterich, Hannah via AVO - one click to enlarge

High resolution images of the eruption were acquired by the WorldView-2 satellite on November 5th.

The image is shown in false color (near-infrared, red, and green bands) to highlight the lava channel. The left figure shows the continuous ashy plume that drifted northeast throughout the day on November 5. There is also a fresh tephra deposit on the snow that is likely from the previous day when the plume was heading east. In the close-up of the lava flow on the right, it is possible to see the active lava channel along the western flow margin that is feeding the flow front, where there is a small steam plume. The active flow length along the channel is ~1.1 km and the channel width ranges from 10 meters near the vent to 60 meters distally. The newer flows are snow-free, while the older eastern lobe appears to have a dusting of snow on top. Ice continues to collapse around the flow front from melting.

Veniaminof - Sentinel 2 images from 07.11.2018, from left to right and from top to bottom, respectively in natural colors, strips 12,11, 4 and SWIR - one click to enlarge.Veniaminof - Sentinel 2 images from 07.11.2018, from left to right and from top to bottom, respectively in natural colors, strips 12,11, 4 and SWIR - one click to enlarge.
Veniaminof - Sentinel 2 images from 07.11.2018, from left to right and from top to bottom, respectively in natural colors, strips 12,11, 4 and SWIR - one click to enlarge.

Veniaminof - Sentinel 2 images from 07.11.2018, from left to right and from top to bottom, respectively in natural colors, strips 12,11, 4 and SWIR - one click to enlarge.

The images of Satellite Sentinel 2 of 7 november complete this picture of the current eruption; the radiative power is low with 9 MW recorded by Mirova.

Sources: AVO & Mirova

Kuchinoerabujima - 08.11.2018 / 14:46 - new JMA webcam

Kuchinoerabujima - 08.11.2018 / 14:46 - new JMA webcam

A new webcam is available to follow the evolution of the eruption at Kuchinoerabujima in the Ryuku arc in southern Japan.

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Publié le par Bernard Duyck
Publié dans : #volcanic activity

A new eruptive phase began this November 6 in Fuego, the fourth for 2018.

Low-to-moderate steady-state explosions are recorded, accompanied by ash plumes at 4,800 m. asl., traveling 20 km westerly and southwesterly, and with shock waves and sounds of train locomotive.

Ash falls are reported on Panimaché, El Porvenir, Morelia, Santa Sofia, Sangre de Cristo, Finac Palo Verde, and San Pedro Yepocapa.

Fuego - seismogram and RSAM of 06.11.2018 / 8h - Doc.Insivumeh


Incandescent impulses mark the crater, 200-300 meters high, generating avalanches around the crater, impacting the vegetation towards the Seca and Taniluya barrancas, and feeding a 1000 meter long flow, then reaches 1,200 meters in the Ceniza gorge.

The effusive activity then continued until the evening, weakening very slightly.

Sources: Insivumeh & Conred.
 

 Fuego - lava flow 06.11.2018 - image Sentinel 2 bands 16,11,4 - one click to enlarge

Fuego - lava flow 06.11.2018 - image Sentinel 2 bands 16,11,4 - one click to enlarge

 Fuego - thermal anomalies on 07.11.2018 / 3:45 - Doc.Mirova Modis

Fuego - thermal anomalies on 07.11.2018 / 3:45 - Doc.Mirova Modis

In Costa Rica, the Turrialba continues since last week his intermittent eruptions, accompanied by plumes of ash to 500 meters in height.

During the previous night and the morning of November 6, ash emissions continued, with dispersion to the southwest and west. The seismic activity oscillates between moderate and high, characterized by a tremor of great amplitude in relation to the movements of internal fluids.
 

A short phreatic eruption was recorded at Rincon de La Vieja on November 5th at 15:11 local time; it was accompanied by a column of gas and vapor of 100 meters above the crater, dispersing to the west.

According to the Ovsicori, an increase in temperature and hydrothermal fuze content has been observed since 29 October in the waters of the Ojo de Agua Santuarium, located 3.5 km north of the crater.

Sources: Ovsicori and RSN.

Turrialba - 06.11.2018 / 7:45 - RSN webcam

Turrialba - 06.11.2018 / 7:45 - RSN webcam

The activity of Villarica continues this November 6 with strombolian explosions that eject shreds of lava up to 80 meters above the crater, and which fall on the periphery of the latter.

POVI's Werner Keller says the volcano's behavior is similar to that seen in mid-February 2017.

Source: POVI

Villarica - Strombolian activity from 06.11.2018 between 0h50 and 01h44 - Doc.POVI

Villarica - Strombolian activity from 06.11.2018 between 0h50 and 01h44 - Doc.POVI

In recent days, La Reunion has also its Geological Guide (in French).

Presentation by Ludovic Leduc:

"This guide is first and foremost a complete geological history that allows to fix the key notions and moments since the emergence of the island, more than 3 million years ago. ) Ten detailed hikes to see ... and understand ! From Mafate to the Piton de la Fournaise through the Lava road or the Plain of Cafres, we tried to mix pedagogy and beautiful iconography to succeed in making you take the measure of geological phenomena at work on this beautiful island.This is finally seven sheets discovered on topics as varied as volcanic organs, extreme climates of the island or the functioning of the volcanological observatory ...

A must for lovers (or future) of Reunion ! "

Authors: Ludovic Leduc (coordinator), Marie Chaput, Simon Defortis and Olivier Hoarau - 256 pages, 1 geological history, 10 hiking trails and 7 discovery sheets.

Geological Guide of Reunion Island - and its hiking trails - one click to enlarge
Geological Guide of Reunion Island - and its hiking trails - one click to enlargeGeological Guide of Reunion Island - and its hiking trails - one click to enlarge

Geological Guide of Reunion Island - and its hiking trails - one click to enlarge

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