Magnitude 4.1 Earthquake of OFFSHORE NORTHERN CALIFORNIA 2012 April 17

2012 April 17 20:31:35 UTC: OFFSHORE NORTHERN CALIFORNIA

Magnitude: 4.1

Date-Time : Tuesday, April 17, 2012 at 20:31:35 UTC
Tuesday, April 17, 2012 at 01:31:35 PM at epicenter

Location : 40.974°N, 124.422°W
Depth : 19.8 km (12.3 miles)

Region : OFFSHORE NORTHERN CALIFORNIA
Distances:

a) 26 km (16 miles) WSW (247°) from Trinidad, CA

b) 27 km (17 miles) WSW (254°) from Westhaven-Moonstone, CA

c) 30 km (19 miles) NW (313°) from Eureka, CA

d) 369 km (229 miles) NW (318°) from Sacramento, CA

Location Uncertainty: horizontal +/- 0.4 km (0.2 miles); depth +/- 0.6 km (0.4 miles)

Parameters : Nph= 68, Dmin=37 km, Rmss=0.14 sec, Gp=187°, M-type=regional moment magnitude (Mw), Version=7