A shake alert went out over the U.S. Geological Survey's early warning system on Dec. 4, warning that a 5.9 earthquake near Carson City in western Nevada could produce heavy shaking in the region.

The United States Geological Survey said on Thursday that its automatic earthquake detection system had erroneously sent out a report earlier in the day that a 5.9 magnitude earthquake had struck near...

Christie Rowe, director of the Nevada Seismological Laboratory, said the ShakeAlert system had issued 160 correct alerts, three false ones and missed 14 quakes since it launched in California about si...