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Earth of fire

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

Publié le par Bernard Duyck
Publié dans : #volcanic activity, #Sismologia
Nevados de Chillan - 29.03.2020 / 9.44 p.m. - Webcam Sernageomin

Nevados de Chillan - 29.03.2020 / 9.44 p.m. - Webcam Sernageomin

At the Nevados de Chillan volcanic complex, explosive activity was recorded on March 29 at around 6:38 p.m. local, with a scattering of ash at low altitude in an east-southeast direction.

It continued on March 30, with grayish emissions reaching a maximum of 1,400 meters.

Volcano-tectonic earthquakes dominate at the seismicity level.

The technical alert is maintained in Amarilla

 

Sources: Sernageomi & Volcanes de Chile

Stromboli - 03.31.2020 - lava overflow in the Scira del Fuoco, at 2:35 and 4:47 respectively - SPCT / INGV OE webcam
Stromboli - 03.31.2020 - lava overflow in the Scira del Fuoco, at 2:35 and 4:47 respectively - SPCT / INGV OE webcam

Stromboli - 03.31.2020 - lava overflow in the Scira del Fuoco, at 2:35 and 4:47 respectively - SPCT / INGV OE webcam

The National Institute of Geophysics and Volcanology, Etnean Observatory, informs that the surveillance networks recorded from 23:40 hours UTC approximately on March 30, 2020, a lava overflow from the crater terrace of Stromboli; lava reached the coast line at approximately 1:50 a.m. UTC on March 31.

At the same time as volcanic phenomenology, there is a seismic signal associated with episodes of rolling incandescent blocks along the Sciara del Fuoco and small landslides that generate clouds of dust.

 

Sources : INGV OE & L.G.S.

Stromboli - lava flow in Sciara del Fuoco - 31.03.2020 / à   01h45 and  6h48  -Doc. LGS

Stromboli - lava flow in Sciara del Fuoco - 31.03.2020 / à 01h45 and 6h48 -Doc. LGS

Stromboli - sismogram 31.03.2020 between 01h and 6h45 - Doc. Seismo-acoustic network LGS

Stromboli - sismogram 31.03.2020 between 01h and 6h45 - Doc. Seismo-acoustic network LGS

Sabancaya - summary of the activity between 23 and 29 March 2020 - Doc. I.G.Peru

Sabancaya - summary of the activity between 23 and 29 March 2020 - Doc. I.G.Peru

The eruptive activity of the Sabancaya volcano remained at moderate levels between March 23 and 29, with the continuous recording of moderate explosions and the consequent emission of ash and gas. Consequently, for the following days, no significant change is expected regarding its activity.

During the aforementioned period, the IGP recorded and analyzed the occurrence of approximately 536 earthquakes of volcanic origin, associated with the circulation of fluids (magma, gas, etc.) inside the volcano and accompanied columns of gas and ash up to 3 km high above the summit of the volcano, scattered towards the western, southwest and southern sectors of Sabancaya.

In addition, 16 medium to low intensity daily explosions were recorded on average. The monitoring of the deformation of the volcanic structure records significant anomalies.

Satellite surveillance has enabled the presence of 5 thermal anomalies with values ​​between 2MW and 13 MW, associated with the presence of a surface lava body in the crater of the volcano.

The volcanic alert level in orange and it is recommended not to approach within a radius of 12 km.

 

Source: IG Peru
 

Taal - main crater - taken by drone / Phivolcs archives - Raffy Tima

Taal - main crater - taken by drone / Phivolcs archives - Raffy Tima

In Taal volcano, March 29 was marked by 93 volcanic earthquakes, associated with the fracturing of rocks, including 6 of magnitude between M1.8 and M3.4, felt in the barangays Banyaga, Bilibinwang and Subic Ilaya.

Low emissions of steam plumes are observed at the main crater and at the vents along Daang Kastila Road.

On March 30, the emissions observed reached only 50 to 100 meters in height, drifting to the southwest. THE number of volcanic earthquakes has decreased and is now only 17 events.

The alert level remains at 1 / abnormal; the prohibited zones remain around the main crater and the Daang Kastila crack.

 

Source: Phivolcs

 Reykjanes Peninsula - 30.03.2020 / 5:50 pm - location and magnitude of earthquakes - Doc.IMO
 Reykjanes Peninsula - 30.03.2020 / 5:50 pm - location and magnitude of earthquakes - Doc.IMO

 Reykjanes Peninsula - 30.03.2020 / 5:50 pm - location and magnitude of earthquakes - Doc.IMO

In Reykjanes Peninsula, activity in Grindavík remained high this week after a swarm of earthquakes that started on March 12. This is the same area as where previous earthquake swarms occurred earlier this year.

About 1,000 earthquakes have been located on the Reykjanes Peninsula. The biggest earthquake of the week was M4.2 on March 18, about 5 km NW of Gunnuhver on the Reykjanes Peninsula. The earthquake was widely felt in the southwestern part of Iceland. On March 19, an M3.5 earthquake occurred 3.5 km NW of Grindavík. An M3.0 earthquake occurred on March 20 by Kleifarvatn on the Reykjanes Peninsula, where a small swarm of earthquakes occurred on the same day.

On March 28, 2020, an earthquake swarm occurred on the Reykjanes Ridge. The largest earthquakes in this swarm had a magnitude of Mw3.5. A total of seven earthquakes occurred which were greater than the magnitude Mw3.0.

 

Source: IMO

Reykjanes ridge and peninsula - location and magnitude of the earthquakes of March 29 and 30 / 1:25 p.m. - Doc. IMO
Reykjanes ridge and peninsula - location and magnitude of the earthquakes of March 29 and 30 / 1:25 p.m. - Doc. IMO
Reykjanes ridge and peninsula - location and magnitude of the earthquakes of March 29 and 30 / 1:25 p.m. - Doc. IMO
Reykjanes ridge and peninsula - location and magnitude of the earthquakes of March 29 and 30 / 1:25 p.m. - Doc. IMO

Reykjanes ridge and peninsula - location and magnitude of the earthquakes of March 29 and 30 / 1:25 p.m. - Doc. IMO

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