(Sorry if this was posted already. I looked but didnt see it.)

Raikoki volcano (Kurile Islands, Russia): major explosive eruption, ash to approx. 43,000 ft altitude

A very significant explosive eruption occurred - without any warning - at Raikoki volcano on the evening of 21 June 2019, at or shortly before around 18:10 UTC (or 06:10 local time on 22 June).

A dense dark-brown ash plume rising to estimated 43,000 ft (13 km) altitude was spotted clearly on Japan's Himawari 8 satellite, high above the dense lower cloud decks. As of the time of this post, about 6 hours after the start of the (presumably still ongoing) eruption, the ash plume has reached a length of approx. 500 km and drifting eastwards.

Raikoki is a stratovolcano forming a small island in the central part of the Kuriles, about 16 km across the Golovnin Strait from Matua Island. It rises to an elevation of 700 m.

Being one of the most remote of the Kurils Islands chain and not monitored, so there are no known precursors nor any details from ground observations available. A few eruptions have been known from sporadic historic records during the past centuries.

https://www.volcanodiscovery.com/raikoki/news/82012/Raikoke-volcano-Kurile-Islands-amazing-satellite-images-from-the-ongoing-eruption.html

(Dutchsince has been killing it. YT is seriously throttling his content right now for some reason)