COBB, Calif. – Two earthquakes measuring 3.0 and above were reported near The Geysers geothermal steamfield on Thursday.

The first quake, measuring 3.0 on the Richter Scale, occurred at 11:54 a.m., according to the U.S. Geological Survey.

Recorded at a depth of 2.5 miles, its epicenter was located two miles northwest of The Geysers, six miles west southwest of Cobb and eight miles west northwest of Anderson Springs, the survey reported.

By Thursday evening the U.S. Geological Survey had received a total of 10 shake reports from zip codes including Middletown, Burlingame, Calistoga, San Ramon, Cloverdale, Geyserville, Healdsburg, Citrus Heights and Sacramento.

The second quake, reported to have occurred at 9:21 p.m., measured 3.4 in magnitude according to an initial report from the U.S. Geological Survey.

As of Thursday night a seismologist hadn’t reviewed the report, which means the magnitude could be adjusted.

The quake occurred at a depth of 1.9 miles, and was centered one mile north northwest of The Geysers, five miles west southwest of Cobb and seven miles west northwest of Anderson Springs.

Shake reports were submitted to the U.S. Geological Survey from Calistoga, San Ramon, Walnut Creek, Cloverdale, Healdsburg and Paradise.

A 3.8-magnitude quake was reported Tuesday morning near Clearlake and Clearlake Oaks, as Lake County News has reported.

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