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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
Great Sitkin - archive image 17.06.2018 - Doc. Alaska Air Pilot Dave Clum

Great Sitkin - archive image 17.06.2018 - Doc. Alaska Air Pilot Dave Clum

A small steam explosion was detected at Great Sitkin, in the Aleutian arc on June 2 at 5:40 UTC;

This volcano is monitored by a seismic system in real time, which motivated the AVO to change the volcanic alert to Advisory and the aviation code to Yellow. No correspondence in the regional network of infra-sonic data, nor of observations by satellite

to be continued

 

Source: Alaska Volcano Observatory / AVO

Location of Great Sitkin - map J.Schaefer / AVO

Location of Great Sitkin - map J.Schaefer / AVO

At Merapi, in central Java, the observatory noticed an avalanche of incandescent blocks on June 2nd at 22:45 WIB. Its imprint on the seismogram is of maximum amplitude. 65 mm and a duration of 110 sec. She traveled about 1,100 meters towards Kali Gendol.

The PVMBG provides seismicity information: 2 avalanche earthquakes, 24 eruption earthquakes, 1 breath earthquake, 1 hybrid earthquake, and a shallow volcanic earthquake.

The alert level remains at 2 / waspasa, since May 21, 2018.

 

Source: PVMBG

 Merapi - avalanche of blocks on 02.06.2019 / 22:45 WIB - Doc.Bidari Merapi

 Merapi - avalanche of blocks on 02.06.2019 / 22:45 WIB - Doc.Bidari Merapi

Merapi - summary of the activity of 02.06.2019 - Doc. BPPTKG

Merapi - summary of the activity of 02.06.2019 - Doc. BPPTKG

Heavy rains on the Fuego generated weak to moderate lahars in Las Lajas, Seca and El Jute (Guacalate and Achiguate tributaries).

They consisted of pasty materials, metric blocks, branches and tree trunks and topped with steam columns because of the high temperature of the components. A strong smell of sulfur accompanies them.

 

Sources: Insivumeh & Conred

Traces on the seismogram of the lahars of Fuego - Insivumeh report of 02.06.2019 / 14h

Traces on the seismogram of the lahars of Fuego - Insivumeh report of 02.06.2019 / 14h

The situation does not evolve in Sangay, in continuous eruption, as evidenced by the image Sentinel 2 June 1.

The activity remains, as at the end of May, explosive at the central and effusive crater at the Ñuñurcu dome.

Although it does not pose much danger to humans in this remote region of Ecuador, it impacts the biodiversity of the National Park, which is home to mountain tapirs, giant otters, Andean rock cocks and vultures.

 

Sources: Sentinel 2, Copernicus

Sangay - activity from 01.06.2019 - image Sentinel-2 SWIR - one click to enlarge

Sangay - activity from 01.06.2019 - image Sentinel-2 SWIR - one click to enlarge

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