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Earthquake calibration
According to the USGS, that was just a 3.4 quake on the Hayward fault, epicenter 2 miles ESE of Berkeley. My co-workers think it was under our building.
3.4 2007/02/23 15:46:15 37.865N 122.241W 11.5 3 km ( 2 mi) ESE of Berkeley, CA
I called it as a 3.6 or a 3.7, and I've been wrong consistently here at the new spot in the building. I need to subtract .3 or .4 from my first guess, and will eventually achieve a more accurate Richter scale guess, given enough tremors to practice.
3.4 2007/02/23 15:46:15 37.865N 122.241W 11.5 3 km ( 2 mi) ESE of Berkeley, CA
I called it as a 3.6 or a 3.7, and I've been wrong consistently here at the new spot in the building. I need to subtract .3 or .4 from my first guess, and will eventually achieve a more accurate Richter scale guess, given enough tremors to practice.