Shiveluch volcano (Kamchatka, Russia): no major eruption on 25 Aug, ash plume only to 23,000 and not 70,000 ft
The recently reported eruption on 25 Aug alerting of an ash plume as high as 70,000 ft (21300 m) did not take place.
Tue, 27 Aug 2019, 22:2322:23 PM | BY: T
There is no data (satellite-based, direct observations etc) to confirm an eruption of this magnitude.
The report was based on an erroneous alert from the Anchorage VAAC. An eruption did take place, observed by a group of people staying nearby and who sent us images on social media, but it was "only" producing an ash column rising approx. 23,000 ft (7 km) - something not unusual for Shiveluch which has been having eruptions of this size for decades at irregular intervals.
However, it should be mentioned that eruptions of larger size (with ash plumes of 70,000 ft or more) are entirely possible, have occurred and will occur again sooner or later. In case of doubt, VAAC centers need to assume the "worst-case scenario" as a measure of safety.
Mon, 26 Aug 2019, 05:45