After two moderate quakes on Wednesday night, the most recent Yellowstone National Park earthquake swarm appears to be shifting, with more quakes recorded on Thursday and Friday morning, but most of the small were of a very minor magnitude.

A small earthquake swarm continues in the western region of Yellowstone National Park, with one quake yesterday reaching 3.7 on the Richter scale, but experts say the activity is due to shifts in the Earth's crust, not any impending Yellowstone supervolcano eruption.

A small earthquake swarm hit near the Old Faithful area of Yellowstone National Park over the weekend and is continuing now, in what researchers are calling a common occurrence in the region.

Government officials say there's no way they can meet a requirement by U.S. District County Judge Donald Malloy that they maintain the Yellowstone Ecosystem grizzly population under the auspices of the Endangered Species Act.