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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
 Etna SEC - ash emission of 06.17.2021 / 09:38 - photo Gio Giusa

 Etna SEC - ash emission of 06.17.2021 / 09:38 - photo Gio Giusa

The INGV announces that from approximately 20:20 UTC on June 17, 2021, a sudden increase in Strombolian activity is observed at the level of the south-eastern crater of Etna, producing a continuous ash emission which disperses in the summit zone and an overflow which propagates towards the SW. The products of Strombolian activity protrude from the rim of the crater falling along the sides of the crater.

From approximately 23:20 UTC, the Strombolian activity of the southeast crater passed to a lava fountain phase.

This stopped at 00.10 UTC. June 18.
From 8:50 am The INGV reports that from the images of the surveillance cameras, we observe that the explosive activity at the level of the South-East crater has ceased, the lava overflow extending in a south-west direction is cooling.

 

Source: INGV OE

Etna - Thermal anomalies as of 06/18/2021 / 9.50 a.m. - image and data Sentinel-2 bands 12,11,8A & MODIS thremal volcanic activity - Doc. Mirova - one click to enlarge

Etna - Thermal anomalies as of 06/18/2021 / 9.50 a.m. - image and data Sentinel-2 bands 12,11,8A & MODIS thremal volcanic activity - Doc. Mirova - one click to enlarge

Etna - variations of the tremor at 19.06.2021 / 06h - Doc. INGV OE - one click to enlarge

Etna - variations of the tremor at 19.06.2021 / 06h - Doc. INGV OE - one click to enlarge

A small thermal anomaly, of VRP 6 MW is reported by Mirova in Kadovar, Papua New Guinea, on June 18, 2021, at the summit of the volcanic island.

Some other anomalies were reported in June, respectively on 10,11,13.

 

Sources: Mirova and Sentinel-2

Kadovar - Small hot spot and degassing on 06/18/2021 - image Sentinel-2 bands 12,11,4

Kadovar - Small hot spot and degassing on 06/18/2021 - image Sentinel-2 bands 12,11,4

Kadovar - thermal anomalies - image Sentinel-2 bands 12,11,8A & MODIS thermal volcanic activity at 06/18/2021 / 00h47 - Doc. Mirova - one click to enlarge

Kadovar - thermal anomalies - image Sentinel-2 bands 12,11,8A & MODIS thermal volcanic activity at 06/18/2021 / 00h47 - Doc. Mirova - one click to enlarge

In Merapi, on Java, the seismicity of this June 19, from 00h to 12h local, is characterized by:

- 113 avalanche earthquakes
- 10 emission earthquakes

- 32 hybrid / multiphase earthquakes
- 8 shallow volcanic earthquakes
- 1 distant tectonic earthquake

The activity level remains at 3 / siaga.

The current potential danger is in the form of lava avalanches and hot clouds in the south-southwest sector covering the Yellow, Boyong, Bedog, Krasak, Bebeng and Putih rivers for a maximum of 5 km and in the south-eastern sector, the Gendol river. up to 3 km. During this time, the ejection of volcanic material in the event of an explosive eruption can reach a radius of 3 km from the summit.

 

Sources: PVMBG & Magma Indonesia

Merapi - degassing on 19.06.2021 / 8:01 am WIB - Doc. Magma Indonesia

Merapi - degassing on 19.06.2021 / 8:01 am WIB - Doc. Magma Indonesia

Merapi - activity since 12.54 WIB on 06.19.2021 - photo Obs.Panguk

Merapi - activity since 12.54 WIB on 06.19.2021 - photo Obs.Panguk

The seismicity of Ili Lewotolok has intensified over the past two days with:

on June 18, 2021 from midnight to midnight:
- 4 eruption earthquakes
- 14 emission / blast earthquakes
- 1 episode of Harmonic tremor
- 3 episodes of non-harmonic tremor
- 1 episode of continuous tremor, with an amplitude of 0.5-1 mm, dominating 0.5 mm.

on 19.06, between 00 and 12 noon:
- 16 eruption earthquakes
- 16 blast / emission earthquakes
- 3 episodes of Harmonic tremor
- 13 episodes of non-harmonic tremor
- 1 episode of continuous tremor, with an amplitude of 0.5 to 1 mm, dominant from 0.5 to 1 mm.

 

The activity level remains at 3 / siaga.
Communities around Mount Ili Lewotolok and visitors / climbers / tourists are recommended not to engage in activities within 3 km of the summit / crater of Mount Ili Lewotolok. The community of Jontona Village should always be aware of the potential threat of weathered material avalanches which may be accompanied by hot clouds from the southeast peak / crater of G. Ili Lewotolok.

 

Sources: PVMBG & Magma Indonesia

Ili Lewotolok - 19.06.2021 / 12h53 WITA- photo Jeffry Pugel via PVMBG - Magma Indonesia

Ili Lewotolok - 19.06.2021 / 12h53 WITA- photo Jeffry Pugel via PVMBG - Magma Indonesia

Ili lewotolok - seismicity on 06/18/2021 - N.B.: net change on 06/17 and 06/18 - Magma Indonesia - one click to enlarge

Ili lewotolok - seismicity on 06/18/2021 - N.B.: net change on 06/17 and 06/18 - Magma Indonesia - one click to enlarge

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