Sleep across the Sierra was cut short early Friday when a pre-dawn earthquake near Silver Springs, Nevada, sent a sharp jolt from Reno and Lake Tahoe out to parts of the Sacramento Valley. The shaking lasted several seconds in many spots, triggered hundreds of reports from startled residents, and, according to emergency officials, brought no immediate reports of major damage or injuries.
Where and how strong
According to the U.S. Geological Survey, the quake hit at 8:17 a.m. UTC (1:17 a.m. Pacific) and was initially logged with a preliminary magnitude of 5.2. A reviewed listing from the Nevada Seismological Laboratory later placed the epicenter roughly 11 to 12 miles southeast of Silver Springs and revised the magnitude to about 4.9 after analysts took a closer look at the instrument data.
Where it was felt and impacts
More than 1,600 people filed “felt” reports in the hours after the quake, and exposure estimates suggested several thousand people were in areas of moderate…..