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Earth of fire

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

Résultat pour “kuchinoerabujima

Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

L’éruption du volcan Wolf sur l’île Isabela / Galapagos n’est plus beaucoup documentée pour l’instant.

L’entrée de la coulée de lave dans le Pacifique  le 28 mai 2015 a cependant été enregistrée tant par les passagers du navire Endeavour que par le satellite EO-1 de la NASA.

MIROVA signale toujours une anomalie thermique "Modérée" ... signe d'une éruption en cours.

Sources :

Parque Nacional Galapagos / Nasa EO-1 / MIROVA

Despite extensive cloud cover, the Advanced Land Imager (ALI) on the Earth Observing-1 satellite acquired this view of lava flowing into the ocean on May 28, 2015. The false-color image combines shortwave infrared, near infrared, and green light (ALI bands 9-7-4). Clouds appear blue-white, while liquid water is dark blue. Vegetated areas are green; old lava flows are brown. Fresh lava is bright orange and red.

Despite extensive cloud cover, the Advanced Land Imager (ALI) on the Earth Observing-1 satellite acquired this view of lava flowing into the ocean on May 28, 2015. The false-color image combines shortwave infrared, near infrared, and green light (ALI bands 9-7-4). Clouds appear blue-white, while liquid water is dark blue. Vegetated areas are green; old lava flows are brown. Fresh lava is bright orange and red.

Vidéo Nat Geo mise en ligne le 29.05.2015

Anomalie thermique modérée au volcan Wolf, à distance du sommet (coulée de lave)  - doc. MIROVA 02.06.2015

Anomalie thermique modérée au volcan Wolf, à distance du sommet (coulée de lave) - doc. MIROVA 02.06.2015

Des précisions du GSI concernant l’éruption du Shindake sur l’île-volcan Kuchinoerabujima : l’analyse des échantillons de cendres confirme la nature phréato-magmatique de l’éruption , sur base d’une composition à ~60% de roches altérées et ~30% de substance légèrement magmatique.

Le JMA confirme que le cratère du volcan n’a pas subi de changement notable.

Sources :

GSI - link & JMA / via Shérine France

Kuchinoerabujima - peu de changements morphologiques au cratère Shindake (photo du haut / 01.06.2015 , avec le panache) - photo JMA

Kuchinoerabujima - peu de changements morphologiques au cratère Shindake (photo du haut / 01.06.2015 , avec le panache) - photo JMA

Au Mexique, le volcan Colima présente toujours des explosions régulières . Le 1 juin, on comptabilise plus de 40 explosions.

Sources :

Universitad de Colima

Webcams de Mexico

Sismos du Colima -01.06.2015 - doc. Universitad de Colima

Sismos du Colima -01.06.2015 - doc. Universitad de Colima

Colima 01.06.2015 / 4h32 - forte explosions et retombées incandescentes sur le sommet. - photo webcamsdemexico

Colima 01.06.2015 / 4h32 - forte explosions et retombées incandescentes sur le sommet. - photo webcamsdemexico

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Cotopaxi  - photo José Luis Espinosa-Naranjo 2015.

Cotopaxi - photo José Luis Espinosa-Naranjo 2015.

Cafouillage ou incertitude au Cotopaxi ?

Malgré une augmentation de la sismicité, une inflation du flanc nord-est, un panache de dégazage plus important et des émissions de dioxyde de soufre de cinq fois plus forte que le niveau de base, le niveau d’alerte du Cotopaxi n’a pas été augmenté par l’IGEPN ; l’Institut mise sur une poursuite de l’activité dans les semaines prochaines.

La secrétaire de la gestion des risques, Mme Cornejo, assure du soutien de l’Institut météorologique face au problème que pourraient poser d’éventuels lahars ; des réunions de formation de la population concernant ce risque sont organisées dans la province de Cotopaxi.

Sources :

- IGEPN rapport du 11.06 - link

- El Comercio : Geofísico descarta erupción súbita del Volcán Cotopaxi; alerta blanca se mantiene.17.06.2015 - link

Kuchierabujima - 5月29日10時03分、口永良部島 金岳小中学校の校庭で撮影 - http// kuchi-erabu.orgfunka.html29.05.2015 -

Kuchierabujima - 5月29日10時03分、口永良部島 金岳小中学校の校庭で撮影 - http// kuchi-erabu.orgfunka.html29.05.2015 -

Le JMA a relevé une nouvelle éruption au cône Shindake du Kuchinoerabujima aux environs de 12h20 locale ce 18 juin ; elle n’a pu être observée directement en raison des conditions météo, mais bien par les sismographes.

Le niveau d’alerte reste maximum, et les habitants, évacués en fin mai, ne peuvent pas regagner leur île.

Sinabung 18.06.2015 / 01h05 - dôme-lobe toujours en place et avalanche de blocs - photo endrolew@

Sinabung 18.06.2015 / 01h05 - dôme-lobe toujours en place et avalanche de blocs - photo endrolew@

Au Sinabung, l’activité du volcan a forcé à de nouvelles évacuations préventives : les effondrements partiels forment des coulées pyroclastiques qui parcourent 2 à 3.000 mètres ; le risque principal restant un collapsus total de l’énorme dôme-lobe sommital, 1.200 personnes ont été déplacées hier, et 2.500 autres devraient l’être bientôt.

Sinabung le 17.06.2015 / 22h26 avalanche de blocs et traces des coulées pyroclastiques précédentes - photo endrolew@

Sinabung le 17.06.2015 / 22h26 avalanche de blocs et traces des coulées pyroclastiques précédentes - photo endrolew@

Sinabung le 17.06.2015 / 14h - Coulée pyroclastique - photo endrolew@

Sinabung le 17.06.2015 / 14h - Coulée pyroclastique - photo endrolew@

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Publié le par Bernard Duyck
Publié dans : #Actualité volcanique
Dukono - panache de cendres du 22.03.2020 / 18h05 WIT - Doc. Magma Indonesia

Dukono - panache de cendres du 22.03.2020 / 18h05 WIT - Doc. Magma Indonesia

Dans l'archipel des Moluques, le Dukono, en alerte niveau 2 / waspada assorti d'une zone interdite de 2 km de rayon autour du cratère Malupang Warirang , a présenté un panache de cendres le 22 mars vers 18h locale. Magma Indonesia signale pour ce jour un séisme tectonique profond et du trémor continu d'amplitude dominante à 2 mm.

Ce matin, vers 8h17 locale, un panache de cendres, estimé à 1.613 mètres asl., est observé.

Le code aviation est orange ; le VAAC Darwin signale des cendres à une altitude de vol 60 et confirme une éruption en cours.

 

Sources : Magma Indonesia et VAAC Darwin

Popocatépetl - activité des dernières 24 heures - Doc. Cenapred / CNPC / Seguridad

Popocatépetl - activité des dernières 24 heures - Doc. Cenapred / CNPC / Seguridad

Le Cenapred a identifié au cours des dernières 24 heures au Popocatépetl une centaine d'exhalations, accompagnées de gaz, de petites quantité de cendres et de fragments incandescents ; une explosion modérée, vers 02h59, a produit une colonne éruptive de 1.000 mètres de hauteur se dispersant vers le sud et l'expulsion de fragments incandescents à quelques 800 mètres sur les flancs.

La sismicité est caractérisée en outre par 129 minutes de trémor de basse amplitude.

Au cours de la journée du 22, une émission constante de gaz et occasionnellement aussi d'un peu de cendres est rapportée.

Le 23 mars , vers 0h41, une nouvelle explosion s'est accompagnée d'un panache de cendres d'hauteur moyenne et d'éjection de matériaux incandescents jusqu'à 700 mètres sur les hauts flancs.

Le niveau reste à amarillo Fase 2.

 

Sources : Cenapred, CNPC et webcamsdeMexico.

Popocatépetl - 23.03.2020 / 00h41  - Doc. WebcamsdeMexico

Popocatépetl - 23.03.2020 / 00h41 - Doc. WebcamsdeMexico

Le Japan Meteorological Agency / JMA a enregistré un panache blanc à 400 mètres au dessus du cratère du Kuchinoerabujima dans l'archipel des Ryukyu .

La sismicité est caractérisée par des séismes volcano-tectoniques, en hausse, dont le nombre atteint 25/ jour.

Les émissions de dioxyde de soufre sont de l'ordre de 1.300 tonnes / jour.

Le dernier bulletin du 23 mars fait état de bombes et de coulées pyroclastiques susceptibles d'affecter une zone jusqu'à 2 km du cratère.

 

Source : JMA

Cratères sommitaux du  Shindake et les fissures  - photo H.Seo via Narod.ru

Cratères sommitaux du Shindake et les fissures - photo H.Seo via Narod.ru

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Publié le par Bernard Duyck
Publié dans : #volcanic activity
 Kuchinoerabujima - 17.01.2019 / 09h32 - Oki Sakura / FB via Shérine France

Kuchinoerabujima - 17.01.2019 / 09h32 - Oki Sakura / FB via Shérine France

Kuchunoerabujima - 17.01.2019 / 09h20 - eruptive plume and pyroclastic flow - JMA webcam

Kuchunoerabujima - 17.01.2019 / 09h20 - eruptive plume and pyroclastic flow - JMA webcam

An explosive eruption occurred at about 9:19 am on January 17 at Kuchinoerabujima, in the Ryuku volcanic arc, south of Japan.

It was accompanied by a plume of ash to a height of 6.000 meters, ejection of pyroclasts up to 1,000 meters from the crater, but also pyroclastic flows encompassing the southwest flank of the volcano on 1,500 meters. These flows have fortunately not reached the inhabited areas.

Following this eruption, a powerful white plume of gas and vapor was observed.

The JMA maintains the alert level at 3 / do not approach the volcano within a radius of 2 km.

Sources: JMA, NHK and various observers, via Shérine France

The Planchon Peteroa complex presented on January 15 at 20h56 local an explosion accompanied by a greyish ash plume at about 600 meters, moving mainly northwest.

In a previous bulletin, the Sernageomin specifies that according to the observations and the recorded measurements, a new eruptive cycle of phreatomatic characteristics develops, following the possible contact of a magmatic body with a part of the hydrothermal system. which would facilitate the fragmentation of a minor volume of magma and the expansion of steam and the emission of ashes.

The alert level remains in Amarilla.

Source: Sernageomin

Planchon Peteroa - 15.01.2019, respectively at 08h and 15h - webcam ICES - CNEA
Planchon Peteroa - 15.01.2019, respectively at 08h and 15h - webcam ICES - CNEA

Planchon Peteroa - 15.01.2019, respectively at 08h and 15h - webcam ICES - CNEA

At Merapi / Java, the PVMBG reports for January 16, 2019 a total of 33 collapse earthquakes, a blast earthquake, and a distant tectonic earthquake.

The activity level remains at 2 / waspada.

Source: PVMBG

Merapi - collapse of blocks and incandescence of the dome on 15.01.2017 / 21h25 - Doc. Magma Indonesia

Merapi - collapse of blocks and incandescence of the dome on 15.01.2017 / 21h25 - Doc. Magma Indonesia

Activity report of Merapi for 16.01.2019 - Doc. PVMBG

Activity report of Merapi for 16.01.2019 - Doc. PVMBG

Insivumeh / Guatemala is conducting a geothermal study of the newly formed mud volcano on the shore of Laguna de Ixpaco, municipality of Pueblo Nuevo Viñas / Santa Rosa, with the aim of obtaining more scientific details on this structure. It is for the moment anticipated to speak about the formation of a new volcano, although precautions are necessary during an approach by the inhabitants or the tourists.

Ixpaco lagoon forms a round-shaped lagoon at the base of the dormant Tecuamburro volcano, a volcanic depression connected to an underground river, which is greenish-yellow in color and can turn white due to the high sulfur content.

Sources: Insivumeh & Conred

Pueblo Nuevo Vinas / Santa Rosa - mud volcano - picture Conred 16.01.2019

Pueblo Nuevo Vinas / Santa Rosa - mud volcano - picture Conred 16.01.2019

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Nevados de Chillan - explosion and ash plume of 08.08.2018 / 16:12 GMT - photo Zé Maurício.

Nevados de Chillan - explosion and ash plume of 08.08.2018 / 16:12 GMT - photo Zé Maurício.

An explosion marked the Nevados de Chillan on August 8 at 12:12 local / 16:12 GMT, accompanied by a gray ash plume high about 1,500 meters, and ballistic projections visible on the thermal camera.

An earthquake of a superficial hypocentre, estimated at 200 meters marked the explosive episode and testifies to the instability of the volcanic system, and the evolution of the dacitic dome.

A video from the slopes of the ski resort is available on Facebook / https://www.facebook.com/quillonaldia/videos/1090806864401814/

The technical alert remains nevertheless to Naranjo.

Source: Sernageomin
 

Kuchinoerabujima - 08.08.2018 - JMA photo

Kuchinoerabujima - 08.08.2018 - JMA photo

In the Ryuku volcanic arc, south of Japan, volcanic earthquakes have been increasing in Kuchinoerabujima since 6 August, as well as sulfur dioxide emissions. To follow.

Source: Fukuoka District Meteorological Observatory Kagoshima Regional Meteorological Observatory / JMA / info via Shérine France

Fuego - eruptive behavior change - photo Insivumeh

Fuego - eruptive behavior change - photo Insivumeh

A change of eruptive behavior in Fuego is reported by Insivumeh.

Fuego - seismogram and RSAM 08.08.2018 - Doc.Insivumeh


A strong explosion, accompanied by avalanches around the crater, fallout and shockwaves, occurred on August 8 at 21:20 local. Incandescent materials were ejected at 4,800 m Asl., Evening about 1,100 meters above the summit; the ash plume moved 12 km to the west.

This is the first strong explosion recorded in the last six weeks.

Source: Insivumeh

Kilauea East rift zone - the cone on crack 8 has only a weak incandescence and a low level of lava - photo USGS 07.08.2018

Kilauea East rift zone - the cone on crack 8 has only a weak incandescence and a low level of lava - photo USGS 07.08.2018

In the eastern rift zone of Kilauea, the situation seems frozen ... for now.

Only a weak incandescence remains visible in the cone on the fissure 8. The thermal images of the lava field reflect a drop in activity level, compared to the previous 3 days; the lava, however, is present under the crust at various points.

Hurricane Hector's approach is already manifested by strong winds and larger waves ... observations and images will be scarce over the lava field in the next few hours.

Source: Hawaii Tracker 08.08.2018

Hurricane Hector approaches the shores of the Hawaiian Archipelago - doc.NOAA 08.08.2018Hurricane Hector approaches the shores of the Hawaiian Archipelago - doc.NOAA 08.08.2018

Hurricane Hector approaches the shores of the Hawaiian Archipelago - doc.NOAA 08.08.2018

Lombok - felt reports of the intensity of the earthquake 09.08.2018 / 5:25 UTC - M5,9 - Doc.EMSC

Lombok - felt reports of the intensity of the earthquake 09.08.2018 / 5:25 UTC - M5,9 - Doc.EMSC

The north-west of Lombok Island was shaken by a strong aftershock on August 9, 2018 at 5:25 UTC; the hypocentre is located 31 km deep, and the magnitude of 5.9.

The inhabitants are still traumatized by the deadly and destructive earthquake of August 5; its balance sheet at 08,08,2018 / 13h was 227 dead, 1,477 injured, 156,000 displaced. At the level of destruction, there are 42,239 houses and 458 damaged schools.

Sources: BNPB, EMSC and media

Material damage in northern Lombok - photo BNPB 09.08.2018

Material damage in northern Lombok - photo BNPB 09.08.2018

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
 Complexe Planchon Peteroa - 07.11.2018 / 10h24 loc.- photo Radio Pumaiten

Complexe Planchon Peteroa - 07.11.2018 / 10h24 loc.- photo Radio Pumaiten

Le Sernageomin informe d'une émission de matériaux particulaires au Complexe volcanique Planchon- Peteroa ce 7 novembre à 10h24 locale (13h24 GMT) ; le panache a atteint 1.000 mètres d'altitude, se dispersant vers l'ESE. L'épisode n'a pas donné de signaux sismiques précurseurs significatifs.

Les émissions se sont poursuivies en journée.

En raison du contexte, il s'inscrit dans le niveau d'alerte en vigueur : alerte technique Amarillo.

Dans sa situation d'octobre, l'observatoire ne renseigne aucune déformation, ni d'anomalies d'émission de dioxyde de soufre ... quelques émissions de matéruax particulaires sont signalés les 13,14 et 15 octobre à environ 600 mètres au dessus du cratère actif.

La dernière éruption du complexe est datée de 2010-2011, faisant suite au séisme de Maule.(lien vers le rapport du GVP

 

Source : Sernageomi / OVDAS & Radio Pumaiten

 Complexe Planchon Peteroa - 07.11.2018 / 10h24 loc. et vers 17h GMT - webcam Sernageomin (on peut regretter l'absence d'heure de prise de vue sur les images !) - un clic pour agrandir Complexe Planchon Peteroa - 07.11.2018 / 10h24 loc. et vers 17h GMT - webcam Sernageomin (on peut regretter l'absence d'heure de prise de vue sur les images !) - un clic pour agrandir

Complexe Planchon Peteroa - 07.11.2018 / 10h24 loc. et vers 17h GMT - webcam Sernageomin (on peut regretter l'absence d'heure de prise de vue sur les images !) - un clic pour agrandir

L'activité du Nevados de Chillan a été marquée hier 7 novembre par une explosion et un séisme associé à 11h24 ; un panache de cendres est monté à 1.500 mètres.

Nevados de Chillan - sismogramme de l'explosion du 07.11.2018 / 11h24

A 23h03 locale, une explosion vigoureuse s'est de nouveau produite, associée à un séisme LP lié à la dynamique des fluides internes; des blocs incandescents ont été éjectés à des centaines de mètres du point d'émission... probablement une destruction plus ou moins importante du dôme de lave

 

Sources : Sernageomin & Volcanes de Chile.

Nevados de Chillan - 07.11.2018 / respectivement à 02h03 et 02h08 - webcam Sernageomin / Volcanes de Chile
Nevados de Chillan - 07.11.2018 / respectivement à 02h03 et 02h08 - webcam Sernageomin / Volcanes de Chile

Nevados de Chillan - 07.11.2018 / respectivement à 02h03 et 02h08 - webcam Sernageomin / Volcanes de Chile

Au Veniaminof, l'éruption se poursuit avec émission d'un panache de cendres dérivant en direction ouest et une effusion de lave qui alimente une coulée qui atteint 1,1 km, caractérisée par une température de surface élevée. Du trémor de basse amplitude est enregistré en continu.

Veniaminof - 05.11.2018 / 22h26 UTC  - images Worldview-2 en fausses couleurs - Dietterich, Hannah via AVO - un clic pour agrandir

Veniaminof - 05.11.2018 / 22h26 UTC - images Worldview-2 en fausses couleurs - Dietterich, Hannah via AVO - un clic pour agrandir

Des images haute résolution de l'éruption ont été acquises par le satellite WorldView-2 le 5 novembre.

L'image est affichée en fausse couleur (bandes dans l'infrarouge, le rouge et le vert) pour mettre en évidence le canal de lave. La figure de gauche montre le panache de cendres continu qui a dérivé vers le nord-est tout au long de la journée du 5 novembre. Il y a également un nouveau dépôt de téphra sur la neige, probablement à partir de la veille lorsque le panache se dirigeait vers l'est. Dans la vue rapprochée de la coulée de lave sur la droite, il est possible de voir le canal de lave actif le long de la marge de coulée ouest qui alimente le front de coulée, où se trouve un petit panache de vapeur. La longueur du flux actif le long du canal est d'environ 1,1 km et la largeur du canal varie de 10 mètres, à proximité de l'évent, à 60 mètres distalement. Les flux les plus récents ne contiennent pas de neige, tandis que le lobe oriental, plus ancien, semble recouvert d'une couche de neige. La glace continue de s’effondrer autour du front d’écoulement après la fonte.

Veniaminof - images Sentinel 2 du 07.11.2018, de gauche à droite et de haut en bas, respectivement en couleurs naturelles, bandes 12,11, 4 et SWIR - un clic pour agrandir.Veniaminof - images Sentinel 2 du 07.11.2018, de gauche à droite et de haut en bas, respectivement en couleurs naturelles, bandes 12,11, 4 et SWIR - un clic pour agrandir.
Veniaminof - images Sentinel 2 du 07.11.2018, de gauche à droite et de haut en bas, respectivement en couleurs naturelles, bandes 12,11, 4 et SWIR - un clic pour agrandir.

Veniaminof - images Sentinel 2 du 07.11.2018, de gauche à droite et de haut en bas, respectivement en couleurs naturelles, bandes 12,11, 4 et SWIR - un clic pour agrandir.

Les images du Satellite Sentinel 2 du 7 novembre viennent compléter ce tableau de l'éruption an cours ; le pouvoir radiatif est bas avec 9 MW enregistrés par Mirova.

Sources : AVO & Mirova

 Kuchinoerabujima - 08.11.2018 / 14h46 - nouvelle  webcam JMA

Kuchinoerabujima - 08.11.2018 / 14h46 - nouvelle webcam JMA

Une nouvelle webcam est disponible pour suivre l'évolution de l'éruption au Kuchinoerabujima dans l'arc des Ryuku, au sud du Japon.

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Publié le par Bernard Duyck
Publié dans : #volcanic activity

An eruption took place this January 11 at Kuchinoerabujima, in the volcanic arc of Ryukyu; it started at 3:05 p.m. and continued at 3:30 p.m., producing a thick plume of ash and gas rising to 2,000 meters before entering the clouds. The ash is dispersed in an eastern sector.

The alert level is 3 / "do not approach the crater" since 28.10.2019.

 

Sources: VAAC Tokyo, and BMC, via Shérine France.

 Kuchinoerabujima - eruptive plume of 11.01.2020 / 3:06 p.m. - JMA webcam

 Kuchinoerabujima - eruptive plume of 11.01.2020 / 3:06 p.m. - JMA webcam

At Etna, the activity of Voragine intensified last night, with a lava flow in the direction of Bocca Nuova, where it pours in two arms.

The thermal anomalies, noted by Mirova, are between 32 and 177 MW.

Note that on the day of January 10, a plume of ash also surmounted the southeast crater.

 

Sources: Michele Mamminno, Mirova and Sentinel-2

Etna - thermal anomalies on 11.01.2020 / 01h40 - Doc .Mirova
Etna - thermal anomalies on 11.01.2020 / 01h40 - Doc .Mirova

Etna - thermal anomalies on 11.01.2020 / 01h40 - Doc .Mirova

The activity of Sangay, in Ecuador, remains without surface and internal changes, always in amarillo alert level.

Seismicity is characterized by LP earthquakes, explosions (between 28 and 43 per day) and the emission tremor; the ash plumes reach 1,500 meters above the summit.

Pyroclastic materials are remobilized by winds, and can constitute a danger in the event of rain, with the formation of lahars.

On January 9, pyroclastic flows were observed by the ECU-911 webcam on the southeast flank of the volcano; this activity is similar to that of previous weeks.

 

Source: IGEPN

Sanguay - descent of pyroclastic flows on 09.11.2020 / 07.55 am - Cámara ECU-911 Sangay

Sanguay - descent of pyroclastic flows on 09.11.2020 / 07.55 am - Cámara ECU-911 Sangay

A control overflight of 23 different Colombian volcanoes was carried out by the Servicio Geologico Columbiano, in collaboration with the Air Forces.

On January 10, monitoring of the arenas crater of Nevado del Ruiz was able to note the morphological changes.

An overflight of the snowy summit of Nevado de Tolima was carried out; the ice cover has disappeared, and the snow compensates for a time the water supply of the local populations, before it melts and no longer feeds the major basin of the Coello river.

 

Source: SGC / Servicio Geologico Columbiano

Nevado del Ruiz - overview of the Arenas crater on 10.01.2020 - photo SGC

Nevado del Ruiz - overview of the Arenas crater on 10.01.2020 - photo SGC

Nevado de Tolima - the snowy summit on 10.01.2020 - photo SGC

Nevado de Tolima - the snowy summit on 10.01.2020 - photo SGC

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
 Etna - small ash emission at nuovissimo crater SE 28.11.2017 / 6h58 - photo Boris Behncke

Etna - small ash emission at nuovissimo crater SE 28.11.2017 / 6h58 - photo Boris Behncke

Etna is a constantly changing volcano: in addition to ash emissions, corresponding to old pulverized material, by the newest crater of the southeast, the main change is to the crater northeast, the highest point of the volcano at 3,324 meters.
Obstructed for 18 months, it reopened. The bottom of the crater collapsed, forming a semicircular mouth that continues to emit a dense plume of gas.
The Northeast crater was flown over last week by a drone, whose images reveal the precarious stability of the inner walls of the crater NE, subject to sudden and unpredictable collapses; his approach must be done with particular attention.


Source: Boris Behncke and Marco Neri; The Gazetta Siracusana.

Etna - the southern edge of the crater Northeast - image Gruppo Droni FLYEYE - INGV-OE./ 28.11.2017 in La Gazetta Siracusana

Etna - the southern edge of the crater Northeast - image Gruppo Droni FLYEYE - INGV-OE./ 28.11.2017 in La Gazetta Siracusana

The eruption continues at the Agung on November 29, with the emission of a double plume on one hand rich in steam, the other richer in ash, amounting between 2,000 and 4,000 meters.

Agung - double plume, respectively at 8:13 and 9:03 local - webcam Telkomsel
Agung - double plume, respectively at 8:13 and 9:03 local - webcam Telkomsel

Agung - double plume, respectively at 8:13 and 9:03 local - webcam Telkomsel

Following a change of wind direction, the ash cloud resumed a south-southeast direction.
The closure of Ngurah Rai International Airport was extended until November 30th at 7:00 am (confirmed by the Indonesian Embassy in Paris), although the VONA was reduced to Orange on 28.11 at 23:49.

Update at 10h TU : airport of Bali is free

Agung - directions of plume and ash cloud on 28.11 at 21h loc and 29.11 at 11h loc. - a click to enlarge - images Himawari 8Agung - directions of plume and ash cloud on 28.11 at 21h loc and 29.11 at 11h loc. - a click to enlarge - images Himawari 8

Agung - directions of plume and ash cloud on 28.11 at 21h loc and 29.11 at 11h loc. - a click to enlarge - images Himawari 8

An interferogram based on Sentinel satellite data shows a displacement of up to 2.8 cm. between November 5 and 17, 2017, and a larger change to the north.
 
Sources: PVMBG, Magma Indonesia, BNPB

Agung - interferogram on Sentinel data between 5 and 17.11.2017 - doc BKG

Agung - interferogram on Sentinel data between 5 and 17.11.2017 - doc BKG

Agung - interferogram on Sentinel data between 5 and 17.11.2017 - doc BKG

At Sinabung, plume and cloud co-pyroclastic succeed each other this November 28; a pyroclastic episode concerning the east-southeast flank was observed over 3,000 meters.
 
Sources: PVMBG & the photographers mentioned.

Sinabung - 28.11.2017 / 8:42 WIB - photo Firdaus Surbakti / Beidar Sinabung

Sinabung - 28.11.2017 / 8:42 WIB - photo Firdaus Surbakti / Beidar Sinabung

 Sinabung - the 28.11.2017 / 18:12 WIB - copyroclastic cloud over 3000 m east-southeast direction - Photo Endro Lewa

Sinabung - the 28.11.2017 / 18:12 WIB - copyroclastic cloud over 3000 m east-southeast direction - Photo Endro Lewa

In the Ryuku volcanic arc to the south of Japan, the Kagoshima observatory reports a sharp increase in volcanic earthquakes and gas emissions at Kuchinoerabujima.
On November 27th, the flow of sulfur dioxide doubled compared to the previous day, with 200 tons / day. On November 28, a white plume was observed rising 700 meters above the Shindake crater, located in the center of the island.
For the record, an explosive eruption on May 29, 2015 generated a pyroclastic flow that reached the coast and caused a total evacuation of the island
 
Source: JMA / via Shérine France

 Kuchinoerabujima - 28.11.2017 / 16h59 - plume at the crater Shindake - JMA webcam

Kuchinoerabujima - 28.11.2017 / 16h59 - plume at the crater Shindake - JMA webcam

 Eruption of Kuchinoerabujima on 29.05.2015 - photo Japantimes

Eruption of Kuchinoerabujima on 29.05.2015 - photo Japantimes

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Publié le par Bernard Duyck
Publié dans : #volcanic activity

As indicated in the update yesterday at 12h local, the eruptive activity at the eruptive site of Piton de La Fournaise, located at 1050 m altitude, was low, with the height of lava projections less than 20 m . Sunday at 8 am, only one active flow was present and was discharging over a distance of less than 200m from the eruptive cone.

Piton de La Fournaise - the eruptive site 27.10.2019 / 8h - photo OVPF

Piton de La Fournaise - the eruptive site 27.10.2019 / 8h - photo OVPF

In its bulletin of 17h local, the observatory means the stop of the activity, or a pause:

" The eruptive activity started on October 25, 2019 at 2:40 pm local time stopped today, October 27, 2019 at 16:30 local time, after a phase of activity in" gas piston "of about 1 hour.

(But ...) no assumption is discounted as to the evolution of the situation to come (final shutdown, resumption of activity on the same site, resumption of activity further downstream), given the observables following:

- 29 superficial superficial volcano-tectonic earthquakes were recorded during the day yesterday,

- "Piston gases" are always registered,

- very little lava was emitted on the surface ".

Piton de La Fournaise - the small eruptive cone on 27.10.2019 - photo OVPF

Piton de La Fournaise - the small eruptive cone on 27.10.2019 - photo OVPF

Piton de la Fournaise - volcanologists in the field for sampling - photo 27.10.2019 OVPF

Piton de la Fournaise - volcanologists in the field for sampling - photo 27.10.2019 OVPF

At 19h in Reunion 1ère, Aline Peltier evokes a possibility of resumption of the eruption ... " It will be necessary that this magma comes out one day ".

Scientists therefore remain vigilant and do not exclude the hypothesis of a crack out of the enclosure or lower than that of the lava front of the latter eruption.

Since the end of this phase of activity, 2 superficial superficial volcano-tectonic earthquakes have been recorded. No earthquakes were recorded in the area of ​​the eruption. No deformation of the building is no longer perceptible.

Since the end of the eruption the SO2 values ​​have returned to normal (emissions low or close to the limit of detection) and the CO2 fluw remain low in the upper part of the Fournaise and go up in the distant sector.

The alert level currently in progress : Alert 2-2

 

Source: OVPF & Meeting 1ère

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

Kuchinoerabujima - webcams and ash advisory - 28.10.2019 / 0h03 - Doc.JMA

Kuchinoerabujima - webcams and ash advisory - 28.10.2019 / 0h03 - Doc.JMA

The JMA raised the alert level of the Kuchinoerabujima to 3 / do not approach the crater on October 28, 2019 at 00:15 local.
This adjustment of the alert follows a massive earthquake on October 27 at 21:33, with a hypocentre located near the crater Shindake.
A possible eruption, likely to cause pyroclastic flows, can impact area from the crater  to the coast.

Source: Japan Meteorological Agency

Kyushu - volcanoes on alert and location of Kuchinoerabujima- map JMA 28.10.2019 / 0h15

Kyushu - volcanoes on alert and location of Kuchinoerabujima- map JMA 28.10.2019 / 0h15

A slight activity still marks Barren Island (since Sept. 25, 2018) in the Andaman Archipelago.

Thermal anomalies are identified by Mirova on October 24 and 27, 2019, when cloud cover allows, and a hot spot is visible on the Sentinel-2 images of October 24th.

 

Sources: Mirova, Sentinel-2 and Global Volcanism Program

Barren Island - hot spot on 24.10.2019 on the image Sentinel-2 bands 12,11,4

Barren Island - hot spot on 24.10.2019 on the image Sentinel-2 bands 12,11,4

Barren island - thermal anomalies on 27.10.2019 / 7.15 am - Doc. Mirova MODIS_Latest10NTI

Barren island - thermal anomalies on 27.10.2019 / 7.15 am - Doc. Mirova MODIS_Latest10NTI

Barren Island - photo archives GVP / 23.02.2017- Courtesy of Jagdish Mukhi, Lt. Governor, Andaman and Nicobar Islands.

Barren Island - photo archives GVP / 23.02.2017- Courtesy of Jagdish Mukhi, Lt. Governor, Andaman and Nicobar Islands.

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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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