There have been more than 400 tremors recorded in this swarm as of May 11. How unusual is this?

Two more earthquakes rattled northwestern Nevada in the early hours of Friday, the second-largest and seventh-largest of a swarm that has lasted for three weeks. A 4.1 quake hit at 1:15 a.m. about 18 ...

A flurry of seismic activity recently has struck Nevada, including a magnitude 5.7 earthquake 45 miles east of Reno that was ...