Feb. 4, 2010 - A strong earthquake occurred at 12:20:21 PM (PST) on Thursday, February 4, 2010.
The magnitude 5.9 event occurred 56 km (35 miles) WNW of Petrolia, CA.
The hypocentral depth is 11 km ( 7 miles).
Magnitude 5.9
Date-Time: Thursday, February 04, 2010 at 12:20:21 PM at epicenter
Location 40.431°N, 124.929°W
Depth 11.2 km (7.0 miles)
Region OFFSHORE NORTHERN CALIFORNIA
Distances
* 56 km (35 miles) WNW (282°) from Petrolia, CA
* 59 km (36 miles) WSW (254°) from Ferndale, CA
* 68 km (42 miles) WSW (256°) from Fortuna, CA
* 76 km (47 miles) WSW (239°) from Eureka, CA
* 363 km (225 miles) NW (306°) from Sacramento, CA
Location Uncertainty horizontal +/- 1.4 km (0.9 miles); depth +/- 2 km (1.2 miles)
Parameters Nph=101, Dmin=50 km, Rmss=0.35 sec, Gp=227°,
M-type=regional moment magnitude (Mw), Version=3
At 12:20 PM Pacific Standard Time on February 4, an earthquake with preliminary magnitude 6.0 occurred 50 miles/80 Km southwest of Eureka, California.
The magnitude is such that a tsunami IS NOT EXPECTED. However, in coastal areas of intense shaking, locally generated tsunamis can be triggered by underwater landslides. This will be the only WCATWC message issued for this event.
