Long Valley

Eruptions

Category archives for Long Valley

With all the talk of the current Yellowstone earthquake swarm, I thought it would worth it to write a post on the the structure and caldera – and why we get earthquake swarms that are structurally rather than magmatically-related. First off, lets think about why calderas formed. This is relatively simple – at least superficially.…

The big geology news right now is the M8 earthquake in American Samoa that generated a killer tsunami (which made it all the way to the Bay Area in California). Mammoth Mountain in California’s Long Valley region. In more benign, volcano-related news: The aviation alert level at Redoubt in the Alaska has been returned to…

Wednesday Whatzits

You’ll have to excuse the curtness of this post. An bad hop in softball will do that to you. Here’s some news: Mt. Dempo in Indonesia Xinhua offers some nice pictures of the current activity going on at the summit crater at Nyiragongo in the Congo. Note the partially-crusted-over lava lake in the first shot.…

Wednesday Whatzits

Busy day so I probably won’t get to update much as we’re busy hosting Dr. Charlie Bacon, geologist for the USGS, here at UC Davis today. Dr. Bacon has written some seminal papers in his career and is probably the foremost authority of the evolution of Crater Lake/Mt. Mazama (speaking of which, >a new geologic…

Some catching up to do

I just got back from a 4 day field trip to the Long Valley Caldera in eastern California, so I’m a little behind on posting. The field trip was great and I had a chance to see a lot of pumice, a lot of welded tuff (in the form of the Bishop Tuff, the large…