Earthquakes around Lake Pend Oreille Thursday and Friday could signal the area may experience a swarm of them or that a big one might be on the way. It could also be decades before the area shakes again. "I would be warning people to take their grandmother's precious crystal off the shelves and put it on the floor for a few days," said Ken Sprenke, a professor of geophysics in the University of Idaho's geological sciences department. "I think there's a good chance we'll continue to get little temblors like that." Earthquake swarms are common in Idaho, he said Friday. "I wouldn't be surprised if this turns into a swarm up there," he said. It's also possible the quakes are foreshocks for a larger event, he said. The first earthquake struck at 7:32 p.m. Thursday and registered magnitude 4.1, with an epicenter north of Granite Creek on the east side of Lake Pend Oreille/David Cole, Coeur d'Alene Press. More here.

Question: How were you affected by the shake, rattle & roll of last week's small North Idaho quakes?