LAKE PILLSBURY – A 3.1 earthquake occurred early Thursday, and was followed by several more quakes over the course of the morning.

The 3.1 quake, centered eight miles west northwest of Lake Pillsbury along an unnamed fault, was recorded at 7:40 a.m. at a depth of 4.1 miles, the US Geological Survey reported.

Within five minutes, a second quake in the same area occurred, measuring 2.6 in magnitude, according to the US Geological Survey.

Five more smaller earthquakes followed over the next three hours, ranging up to 2.4 in magnitude, the US Geological Survey reported. Two were centered in the same location as the first two quakes, two others were nine miles west northwest of the lake, and one was six miles north of the lake.

Over the past month, seismic activity has become a daily occurrence in the Lake Pillsbury area, according to US Geological Survey records.

Since the start of April there have been eight earthquakes measuring 3.0 in magnitude or above. The largest, a 4.8 magnitude quake, took place on April 18, as Lake County News previously reported.

E-mail Elizabeth Larson at This email address is being protected from spambots. You need JavaScript enabled to view it..

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