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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
 Semeru - Sentinel-2 L1C image from 05.05. 2020 bands 12,4,2 - one click to enlarge

Semeru - Sentinel-2 L1C image from 05.05. 2020 bands 12,4,2 - one click to enlarge

According to data from Sentinel-2, Mirova and VAAC Darwin, the activity of Semeru on Java continues.

A lava flow is perceptible on the images of Sentinel-2 of May 5.

Thermal anomalies are noted by Mirova: from VRP 30 to 33 MW on May 4, and from VRP 44 and 29 MW on May 6, respectively at 2:55 p.m. and 5:55 p.m.

The VAAC Darwin mentions an orange aviation code, and ash observed at a flight altitude 140, traveling south on May 7, 2020.

This activity is confirmed by the seismic data provided by the PVMBG / Magma Indonesia

 

Sources: cited in the above report.

Semeru - radiative power on 07.05.2020 / 03h20 - Doc. Mirova_MODIS_logVRP

Semeru - radiative power on 07.05.2020 / 03h20 - Doc. Mirova_MODIS_logVRP

Semeru - sismicity on 06.05.2020 - Doc. PVMBG / Magma Indonesia

Semeru - sismicity on 06.05.2020 - Doc. PVMBG / Magma Indonesia

Moderate eruptive activity continues at Ebeko, in the North Kurils.

A plume of ash was observed on May 7 by volcanologists from Severo-Kurilsk, at 1,900 meters asl, drifting northeast from the volcano.

The aviation code remains orange.

 

Source: KVERT

Ebeko - 07.05.2020 / 07h52 - KVERT webcam

Ebeko - 07.05.2020 / 07h52 - KVERT webcam

On May 6 at 9:45 p.m. UTC / 5:47 p.m. local time, an explosion marked Nevados de

Chillan, accompanied by a plume of ash and gas reaching 2,500 meter high above the emission point, dispersing to the northeast, and a seismic signal of wide period associated with the dynamics of internal fluids.

The alert remains in Amarilla.

 

Source: Sernageomin

Kavachi - Greenish discolored spot spreading south of Vangunu Island (upper center) - Sentinel-2 L1C image from 04.30.2020 bands 4,3,2 - one click to enlarge

Kavachi - Greenish discolored spot spreading south of Vangunu Island (upper center) - Sentinel-2 L1C image from 04.30.2020 bands 4,3,2 - one click to enlarge

Named for a sea god of the Gatokae and Vangunu peoples, Kavachi is one of the most active underwater volcanoes in the southwest Pacific, located in the Solomon Islands south of the island of Vangunu, about 30 km north Indo-Australia subduction site. plate under the Pacific plate. Sometimes called Rejo te Kvachi ("Kavachi oven"), this basaltic to andesitic underwater volcano has produced ephemeral islands up to 1 km long several times since its first eruption recorded in 1939.

 Kavachi - Greenish discolored patch spreading to the south of Vangunu Island - Sentinel-2 L1C image from 04.30.2020 bands 4,3,2 - one click to enlarge

 Kavachi - Greenish discolored patch spreading to the south of Vangunu Island - Sentinel-2 L1C image from 04.30.2020 bands 4,3,2 - one click to enlarge

 Kavachi - Greenish discolored patch spreading to the south of Vangunu Island - Sentinel-2 L1C image from 03.05.2020 bands 4,3,2 - one click to enlarge

 Kavachi - Greenish discolored patch spreading to the south of Vangunu Island - Sentinel-2 L1C image from 03.05.2020 bands 4,3,2 - one click to enlarge

Little news of this volcano, given its underwater status and its remoteness ... however satellite data showed a discoloration of the water around Kavachi from January 2020; discolored plumes have become more frequent, dense and stretched over longer distances.

On April 25, 2020, a satellite image showed a plume in water about 15 km long but spread over an area of ​​approximately 30 square kilometers. A small brown circle of approximately 50,000 square meters indicated the presence of materials on the likely location of the vent.

An image acquired on April 30, 2020 shows a thin ribbon of discolored water stretching about 50 km west of Kavachi. The stain is still visible on an image of May 3.

 

Sources : Global Volcanism Program and Sentinel-2 

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