Earth Observatory Blog

Submitted on 06 Dec 2021 by:

On 4th December 2021 at around 2pm local time, Semeru volcano, located in Eastern Java, Indonesia, generated lahars and large flows of volcanic rocks and ash. Badan Nasional Penanggulangan Bencana (BNPB), the Indonesia national disaster management authority, reported that the volcanic activity has killed more than ten people and injured dozens. The Center for Volcanology and Geological Hazard Mitigation (CVGHM), which monitors Semeru and all Indonesian volcanoes, maintains the volcanic alert level at 2 (advisory) on a scale of 1 to 4.

Semeru is the tallest volcano in Java and one of the most active volcanoes in Indonesia. Its current eruptive period started in April 2014, with frequent ash plumes, pyroclastic flows, and rock avalanches. Some incandescence can often be...

Submitted on 21 May 2020 by:

Did you know that in the past six weeks six volcanoes in Indonesia erupted? These volcanoes are Semeru, Anak Krakatau, Merapi, Kerinci, Dukono, and Ibu. 

These recent eruptions are part of the usual volcanic bustle in Indonesia, impacting mostly the areas close to the volcanoes. While some of these activities were picked up all the way in Singapore, all were reported to aviation authorities.

Issuing Eruption Notifications

The Centre for Volcanology and Geological Hazards Mitigation (CVGHM), the monitoring agency for Indonesian volcanoes, issued a Volcano Observatory Notification for Aviation (VONA) on each eruption. The notification includes a summary of the volcanic activity, the...