The U.S. Geological Survey reported that the first, and largest, temblor took place at 2:47 a.m.
The quake was recorded at a depth of 1.2 miles, and was centered one mile east northeast of The Geysers, according to the USGS.
About 10 minutes later, a 1.8 magnitude quake followed, the USGS reported, followed by three more small quakes, ranging in size from 1.5 to 1.9 in magnitude, over the next two and a half hours, all centered at The Geysers.
So far this week there have been 15 small earthquakes recorded in Lake County, according to the USGS, most of them centered in or around The Geysers area.
The second-largest quake of the week, at a magnitude of 2.9, took place Sunday morning just after 8 a.m. at a depth of 1.3 miles three miles east southeast of The Geysers and three miles from Anderson Springs, the USGS reported.
A 1.8 magnitude quake was recorded by the USGS on Tuesday at 2:27 a.m. at a depth of seven miles, and centered eight miles from Hidden Valley Lake.
Two quakes hit near Lake Pillsbury on Tuesday, a 2.3 magnitude at 5:27 a.m. and a 2.5 at 2:50 p.m.
E-mail Elizabeth Larson at This email address is being protected from spambots. You need JavaScript enabled to view it..
{mos_sb_discuss:2}
