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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
The Ebeko crater, with the Alaid volcano in the background - photo archives KVERT / A. Bichenko, KB GS RAS 16.04.2022 - one click to enlarge

The Ebeko crater, with the Alaid volcano in the background - photo archives KVERT / A. Bichenko, KB GS RAS 16.04.2022 - one click to enlarge

A moderate eruptive activity continues at Ebeko. According to the observations of volcanologists from Severo-Kurilsk, explosions sent ash to 2,700-3,000 meters asl. this July 3, then the ash cloud drifted east.

This activity continues, and explosions up to 6,000 meters asl. can occur at any time, impacting aviation.

Mirova reports a weak thermal anomaly of VRP 2 MW on July 2 at 01:00

The aviation code remains orange.

 

Source: KVERT, IVS FEB RAS

Ili Lewotolok - 03.07.2022 / 06:36 - PVMBG Magma Indonesia webcam - one click to enlarge

Ili Lewotolok - 03.07.2022 / 06:36 - PVMBG Magma Indonesia webcam - one click to enlarge

The activity continues at Ili Lewotolok, marked on July 2 by white, gray or black plumes, between 100 and 1,200 m. above the top

Seismicity is characterized by:
- 32 eruption earthquakes, with an amplitude of 14.6 to 40 mm and an earthquake duration of 28 to 129 seconds.
- 2 avalanche earthquakes, with an amplitude of 3.2 to 5.3 mm and an earthquake duration of 102 to 120 seconds.
- 129 emission earthquakes, with an amplitude of 2.1 to 34.8 mm and an earthquake duration of 20 to 108 seconds.
- 7 episodes of harmonic tremor, with an amplitude of 0.7 to 33.6 mm and an earthquake duration of 70 to 160 seconds.
- 36 episodes of non-harmonic tremor, with an amplitude of 1.8 to 34.5 mm and an earthquake duration of 80 to 250 seconds.
- 2 shallow volcanic earthquakes and
- 2 distant tectonic earthquakes
- 4 periods of continuous tremor with an amplitude of 0.5-1 mm, dominating 0.5 mm.

 

This Sunday, July 03, 2022 at 07:36 WITA, the PVMBG reports an ash plume observed at ± 1000 m above the peak (± 2423 m above sea level). The ash column was observed to be gray to black with moderate to thick intensity to the west. This eruption was recorded on a seismograph with a maximum amplitude of 12.8 mm and a duration of 35 seconds.

 

Sources: PVMBG, Magma Indonesia

Kilauea / Halema'uma'u - Photo L.Gallant HVO  29.06.2022  - one click to enlarge

Kilauea / Halema'uma'u - Photo L.Gallant HVO 29.06.2022 - one click to enlarge

Lava eruption from the western Halema'uma'u vent into the active lava lake at Kilauea's summit has continued over the past 24 hours, with weak seeps along the northern crater floor. The height of the lava lake fluctuated yesterday with changes in summit tilt and is currently on a downward trend.

Summit tiltmeters measured alternating inflationary and deflationary tilt for most of the day, until about 9:00 p.m. last night, when a deflationary phase began consistent with the onset of a deflation-inflation event ( DI) at the top.

All recent lava activity has been confined to the crater, and current data indicates that this scenario is likely to continue. No significant changes were noted at the summit or in either fault zone.

 

Some more recent data: June 17, 2022 flyby measurements indicated that the crater floor had experienced a total elevation of about 120 meters, and that 93 million cubic meters of lava had been emitted since the start of this eruption September 29, 2021. A sulfur dioxide flux of about 1,100 tonnes per day (t/d) was measured on June 30, 2022.

 

Source: HVO-USGS

Kilauea / Halema'uma'u - HVO webcam 2022-07-02 / 20:46 HST - one click to enlarge

Kilauea / Halema'uma'u - HVO webcam 2022-07-02 / 20:46 HST - one click to enlarge

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