Volcanic activity of Cleveland, Chirinkotan and Sinabung .

The AVO has raised the aviation alert level of Cleveland at Orange on July 21, 2015 at 9:13, after detecting an explosion, based on seismic and infrasound detected at 8:17 local. The cloud ceiling prevented the satellite views; However, no ash cloud was seen above the cloud level. Observers, aboard a boat crossing to the north of the volcano, reported the presence of ash on the snow o the top, and steam escaping.

The Cleveland forms the western part of the island Chuginadak, uninhabited and located in the Aleutian volcanic arc.

Three reports from the VAAC Tokyo on 20 July 2015 concern the Chirinkotan volcano in the Kuril respectively at 15h45, 17h50 et 23h20 UTC. and relate a weak ash emissions detected by the Himawari-8 satellite.

The island is uninhabited but situated on aerial line, which has motivated the SVERT to raise the level of alert to yellow.

Sources:
VAAC Tokyo
VONA / SVERT – link
 

In Sinabung, explosion and several pyroclastic flows, including one with a length of 2,500 meters towards SE, accompanied by a co-pyroclastic cloud 500 meters at 17.20.

This information is derived photographers who strafed the volcano.


Sinabung 21.07.2015 / 11:09 p.m. loc.- Incandescent rockfall on both sides - photo endrolew@