Since Thursday, at least 131 earthquakes have been recorded — as small as magnitude 0.2 and as big as magnitude 4 — in the Geysers geothermal steam field in Sonoma and Lake counties.

A series of moderate to minor earthquakes struck near the geologically active area in Northern California known as The Geysers south of Clear Lake Thursday morning.

Two earthquakes struck different parts of Northern California early Thursday morning, according to the U.S. Geological Survey.