via Fisher Caldera, Alaska – The largest Caldera System in the State — Also, here is a video of someone exploring a 2017 quake at
Update, October 29, 2018: The Yellowstone Observatory posted more information on Yellowstone Caldera’s ranking and on the threat assessment process today. Original post: It’s a
Update, January 11, 2019: Per the AVO: VENIAMINOF VOLCANO (VNUM #312070) 56°11’52” N 159°23’35” W, Summit Elevation 8225 ft (2507 m) Current Volcano Alert Level:
This is also helpful in remote areas like Alaska, where volcano monitoring is difficult but absolutely necessary because of heavy air traffic. And, yes, if
The VEI 6 eruption of Katmai/Novarupta in 1912 was the biggest eruption of the 20th century. Today, its ash still causes problems.