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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
Manam - thermal anomalies - Sentinel-2 bands 2,11,8A image from 2022.04.14 - Via Mounts project

Manam - thermal anomalies - Sentinel-2 bands 2,11,8A image from 2022.04.14 - Via Mounts project

Manam - 18.04.2022 - image Sentinel-5P SO2 - via Mounts project

Manam - 18.04.2022 - image Sentinel-5P SO2 - via Mounts project

The VAAC Darwin issued on 18.04.2022 at 11:03Z a warning of continuous ash emission from the Manam volcano, in Papua New Guinea at a flight altitude 160 (13000-14000 meters) extending towards the NE.

The aviation color code is red.

Mirova mentions a strong thermal anomaly of VRP 719 MW on 04.17.2022 / 1:15 p.m.

This is the second high-level eruptive episode for this volcano in 6 weeks. The GVP mentions an eruptive phase in progress since June 29, 2014, of VEI 4.

 

Sources: VAAC Darwin, Mirova  and Global Volcanism Program

Manam - Volcanic ash advisory 18.04.2022 / 11h03Z - Doc. VAAC Darwin IDY65305

Manam - Volcanic ash advisory 18.04.2022 / 11h03Z - Doc. VAAC Darwin IDY65305

Manam - thermal anomalies on 17.04.2022 - Doc. Mirova_MODIS_Latest10NTI

Manam - thermal anomalies on 17.04.2022 - Doc. Mirova_MODIS_Latest10NTI

Merapi activity during the week of April 8-14, 2022 (posted on 18,04,2022) / BPPTKG

This week, 112 lava avalanches were observed in a dominant southwest direction towards the Bebeng River with a maximum slip distance of 2,000 m.
Aerial photos from drone surveys show two avalanche sources in the southwest dome, both pointing towards Kali Bebeng. Meanwhile, the source of the avalanches in the crater's central lava dome is in the old avalanche of March 9-10, 2022.

The volume of the southwest lava dome is 1,672,000 m³ and the central dome is 2,582,000 m³.
The intensity of seismicity this week is still quite high. Mount Merapi's deformation, which was monitored using EDM this week, showed a distance shortening rate of 0.2 cm/day.

Merapi - photo BPPTKG 04.2022

Merapi - photo BPPTKG 04.2022

Merapi - summit area - Doc. BPPTKG 08-14.04.2022

Merapi - summit area - Doc. BPPTKG 08-14.04.2022

Merapi - seismicity and deformation of 8-14 - Doc. BPPTKG

Merapi - seismicity and deformation of 8-14 - Doc. BPPTKG

The activity is defined at the siaga level.
The current potential danger consists of lava avalanches and hot clouds in the south-southwest sector covering the Boyong river for a maximum of 5 km, the Bedog, Krasak, Bebeng river for a maximum of 7 km. The southeast sector covers the Woro River for a maximum of 3 km and the Gendol River for a maximum of 5 km. the ejection of volcanic material in the event of an explosive eruption can reach a radius of 3 km from the summit.

 

Source: BPPTKG

Sangay - Steam and ash emission on 04.18.2022 / 07:25 TL - IGEPN webcam

Sangay - Steam and ash emission on 04.18.2022 / 07:25 TL - IGEPN webcam

Since 07:40 TL on 18.04.2022, the SAGA seismic station has recorded a tremor signal, associated with the current eruptive activity of the Sangay volcano.

The signal amplitude is low compared to the most active pulses recorded during the current eruptive period. However, it can be seen through the cameras that there is a small emission column with a high ash load associated with this signal. Therefore, there is a low probability of ash fall in the surrounding areas, towards the northwest of the volcano (eg, Alao, Cebadas).

The IGEPN continues to monitor the event and will report if relevant changes are detected.

 

Source: IGEPN

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