Activity of Sangay, Anak Krakatau and Bulusan.

The surface and internal activity levels of Sangay remain, as of June 15, 2022, high and unchanged.

On the morning of June 15, thanks to satellite images (GOES-16), a thin cloud of ash could be seen which reached 1.4 km above the crater, with a west-southwest direction.
In addition, ash falls are reported in the town of Retén Ichubamba (Chimborazo province).

The Washington VAAC agency published 5 reports of ash emissions whose heights were recorded between 870 and 2,370 meters above the summit, with a direction between west and southwest.
The MOUNTS platform detected 248.9 tonnes of SO2, measured on 06/14/2022 at 2:01 p.m. (Local Time).
The FIRMS system recorded 21 thermal anomalies, while the MIROVA system reported thermal anomalies between VRP 154 and 868 MW. ( See table)

Seismicity is characterized by: 44 LP earthquakes, 9 explosion earthquakes and 15 episodes of emission tremor.
 

Source: IGEPN

At Anak Krakatau, the PVMBG reports on June 15 and 16 an explosive activity.

The seismicity of June 15 is characterized by:

- 3 eruption earthquakes, with an amplitude of 42-58 mm and an earthquake duration of 30-82 seconds.
- 21 emission earthquakes, with an amplitude of 9 to 41 mm and an earthquake duration of 11 to 35 seconds.
- 50 low frequency earthquakes, with an amplitude of 10 to 40 mm and an earthquake duration of 4 to 18 seconds.
- 1 hybrid / multiphase earthquake, with an amplitude of 8 mm, S-P was not observed and the duration of the earthquake was 9 seconds.
- 3 shallow volcanic earthquakes, with an amplitude of 9-10 mm and an earthquake duration of 5-7 seconds.
- 1 deep volcanic earthquake, with an amplitude of 15 mm, S-P 1.4 seconds and an earthquake duration of 7 seconds.
- And 4 episodes of continuous tremor, with an amplitude of 1-32 mm, dominating 5 mm.

On Thursday, June 16, 2022 at 12:41 p.m. WIB, an eruptive episode is reported, accompanied by an ash plume observed at ± 500 m above the summit (± 657 m above sea level). The ash column was observed to be white, gray to black with thick intensity to the north. This eruption was recorded on a seismograph with a maximum amplitude of 62 mm and a duration of 41 seconds.

The activity level remains at 3 / siaga; People/visitors/tourists/climbers do not approach Mount Anak Krakatau or engage in activities within 5 km of the active crater.

Sources: PVMBG, Magma Indonesia

In Bulusan, the Phivolcs informs, for this June 15, 3 volcanic earthquakes, and a flow of sulfur dioxide of 1,255 tons / day

The alert level remains at 1, with mention of a 150 m steam and gas plume. from above.

Inflation always marks the volcano.

Source: Phivolcs