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Latest Humboldt County Earthquake Measures… 4.6

Earthquake Locationhumboldt-earthquake-03-06-2010
The latest earthquake to hit Humboldt County was initially reported to have a magnitude of 4.4 on the Richter Scale. That estimate changed to 4.6 within a few minutes. Absolutely no reports of damage or injuries were heard on scanner traffic, and it was barely noticeable in Eureka. One person in the office felt it, another didn’t. It hit at 12:46 a.m. local time and was centered approximately 22 miles due West (offshore) of Petrolia.

Magnitude 4.6
Date-Time
Location 40.327°N, 124.705°W
Depth 12.5 km (7.8 miles)
Region OFFSHORE NORTHERN CALIFORNIA
Distances
  • 36 km (22 miles) W (270°) from Petrolia, CA
  • 47 km (29 miles) SW (233°) from Ferndale, CA
  • 54 km (34 miles) WSW (250°) from Rio Dell, CA
  • 69 km (43 miles) SW (222°) from Eureka, CA
  • 341 km (212 miles) NW (306°) from Sacramento, CA
Location Uncertainty horizontal +/- 0.7 km (0.4 miles); depth +/- 0.5 km (0.3 miles)
Parameters Nph= 36, Dmin=35 km, Rmss=0.06 sec, Gp=238°,
M-type=regional moment magnitude (Mw), Version=4
Source
Event ID nc71359410