Block avalanches at Merapi volcano, Central Java 13-15 August 2021

Merapi volcano, Central Java 13-15th August 2021

Published: 20th August 2021

 

Activity of the Volcano:

Observed Merapi from a distance of 5km southwest of the volcano, for several hours on the 13th and 15th August. Weather conditions: 13th August clear weather and 15th August, partly cloudy and foggy conditions.

The frequency of rockfall events from the 2021 lava dome seemed was the highest I had observed in 2021, particularly on the 13th August. On the 15th however, one particular rockfall event in the early evening (around 18:40 local time) produced some strong sounds, but clouds (fog) made visual observation impossible.

The 2021 lava dome on the SW flank has a volume of 1.590.000 m3 (as of 24th June 2021) according to BPPTKG.

5 km restriction zone is currently in place for Merapi volcano, according to Indonesian Authorities BPPTKG, The Center for Volcanology and Geological Hazard Mitigation, Geological Agency. The volcano is as of today 2nd of Mayl still on alert level III.

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13th August

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