The quake struck at 04:42AM local time (12:42PM GMT) and struck at a shallow depth of 9.8 km (6.1 miles).
The epicentre was located at Antelope Mountain on the eastern edge of the Yosemite National Forest, about 40 km (25 miles) NNE (15°) from Toms Place, CA; 45 km (28 miles) S (184°) from Qualeys Camp, NV; 47 km (29 miles) NE (51°) from Mammoth Lakes, CA; and 264 km (164 miles) ESE (105°) from Sacramento, CA.
© Google-IWOEpicentre of Saturday's earthquake.
A magnitude 4 earthquake also struck close to California's border with Nevada last Friday. The quake's epicentre was located in Death Valley National Park, approximately 20 km (13 miles) SW from Scottys Castle, CA; 49 km (30 miles) SSW (208°) from Tokop, NV; 57 km (35 miles) SSE (161°) from Sylvania, NV; 62 km (38 miles) NE (53°) from Lone Pine, CA; 84 km (52 miles) NNE (31°) from Olancha, CA; and 220 km (137 miles) WNW (292°) from Las Vegas, NV.
Nevada also was hit by an earthquake measuring 4.5 magnitude on the Richter Scale on 01 October last. The quake was centred 9 km (6 miles) SE from Schurz and 35 km (22 miles) WSW from Rawhide, NV.
To verify that they are real tectonic phenomena.
There are some rumors floating around that not all of our recent "earthquakes" were real tectonic events.
If they are real earthquakes, a seismogram taken at a reasonable distance from the event will record the pressure wave first, followed by a shear wave, and possibly surface waves after that.
In an explosion event, you will get almost all pressure waves (unless the explosion triggers an earthquake). We should take special interest in the events that occur near militarily sensitive areas.