Just as unexpectedly as when the last swarm started, and just as unexpectedly as when the last swarm stopped, there is a new swarm. Verifying my initial statement: At least at some levels, the experts don’t have much of a clue about these things. Not their fault. It’s just that there is not that much data and there has not been enough study.
After a few days of relative quiet, a new earthquake storm has started up in Yellowstone Natioal Park.
According to the Island Park News:
A modest swarm of earthquakes began in the northeast corner of the Yellowstone Caldera Friday, the Yellowstone Volcano Observatory reports today.
The quakes are about 10 miles (16 km) NNE of the north end of the Yellowstone Lake swarm that was active in late December and early January. As of 7:30 p.m. MST, 10 earthquakes were noted by the University of Utah Seismograph Stations. The largest was magnitude 3.3 and two other events were greater than 2.0. Depths are between 2 and 4 km.
Also noted is the possibility that Earthquakes may change Yellowstone Caldera
Scientists will analyze this data for months to come. They’re already saying the swarm may have created changes in the 37- by 25-mile Yellowstone Caldera in the center of the park, and its associated thermal features. The caldera has a magma plume that extends around 400 miles under the Earth. The caldera’s last large eruption was 640,000 years ago.
The swarm’s tremors have ranged in depth from less than a mile to almost 6 miles.