A "noticeable" Magnitude 2.7 earthquake struck inside the caldera (mouth) of the Yellowstone Super Volcano early today. The quake struck at 12:10 AM eastern US time, at a VERY shallow depth of only 3.9 km (2.4 miles). That is a very shallow depth for any earthquake to take place, and is especially worrisome given the gigantic magma chamber which lies beneath the super volcano.
For those who may not be familiar, Yellowstone is not merely a volcano, it is a super-volcano. There are only fourteen super-volcanoes on the planet, and 13 of those are under oceans. Yellowstone is the ONLY super-volcano on the planet situated on dry land.
