Earthquake magnitudes are determined by seismometers, which record the vibrations that travel through the earth. RELATED: Delaware hit by at least 59 earthquakes since 1871 They are very sensitive ...

It seems the safety analysis, and the earthquake predictions, were done by Holtec before the shale-oil revolution took off in the Delaware basin. In fact, one Holtec graphic of earthquake ...

SEATTLE — A magnitude 3.4 earthquake struck near Auburn Saturday morning with reports of it being felt in Tacoma and Seattle.

The earthquake, which struck just after 10 a.m., was centered about 6 miles southeast of York Harbor. Its effects were felt as far north as Bangor and south as New York City. Alex de Steiguer was ...

A magnitude 5.0 earthquake struck West Texas near Pecos, marking one of the strongest quakes in Texas history.