OFFSHORE NORTHERN CALIFORNIA QUAKES

4.5 M - OFFSHORE NORTHERN CALIFORNIA
Preliminary Earthquake Report

Magnitude 4.5 M
Date-Time

6 Mar 2010 08:47:37 UTC
6 Mar 2010 00:47:37 near epicenter
6 Mar 2010 02:47:37 standard time in your timezone
Location 40.320N 124.733W
Depth 13 km

Distances

38 km (24 miles) W (269 degrees) of Petrolia, CA
49 km (30 miles) SW (234 degrees) of Ferndale, CA
57 km (35 miles) WSW (250 degrees) of Rio Dell, CA
71 km (44 miles) SW (223 degrees) of Eureka, CA
342 km (213 miles) NW (306 degrees) of Sacramento, CA
Location Uncertainty Horizontal: 4.7 km; Vertical 31.6 km
Parameters Nph = 6; Dmin = 46.0 km; Rmss = 0.07 seconds; Gp = 291°
M-type = M; Version = 2
Event ID CI 14597412 ***This event has been revised.
4.4 Ml - OFFSHORE NORTHERN CALIFORNIA
Preliminary Earthquake Report

Magnitude 4.4 Ml
Date-Time

6 Mar 2010 08:46:24 UTC
6 Mar 2010 00:46:24 near epicenter
6 Mar 2010 02:46:24 standard time in your timezone
Location 40.327N 124.705W
Depth 12 km
Distances

36 km (22 miles) W (270 degrees) of Petrolia, CA
47 km (29 miles) SW (233 degrees) of Ferndale, CA
54 km (34 miles) WSW (250 degrees) of Rio Dell, CA
69 km (43 miles) SW (222 degrees) of Eureka, CA
341 km (212 miles) NW (306 degrees) of Sacramento, CA
Location Uncertainty Horizontal: 0.7 km; Vertical 0.5 km
Parameters Nph = 36; Dmin = 35.0 km; Rmss = 0.06 seconds; Gp = 237°
M-type = Ml; Version = 2
Event ID NC 71359410
3.9 Mw - OFFSHORE NORTHERN CALIFORNIA
Preliminary Earthquake Report

Magnitude 3.9 Mw
Date-Time

4 Mar 2010 12:22:31 UTC
4 Mar 2010 04:22:31 near epicenter
4 Mar 2010 06:22:31 standard time in your timezone
Location 40.405N 124.946W
Depth 11 km
Distances

57 km (35 miles) W (279 degrees) of Petrolia, CA
61 km (38 miles) WSW (252 degrees) of Ferndale, CA
71 km (44 miles) WSW (254 degrees) of Fortuna, CA
79 km (49 miles) WSW (237 degrees) of Eureka, CA
362 km (225 miles) NW (306 degrees) of Sacramento, CA
Location Uncertainty Horizontal: 1.9 km; Vertical 1.8 km
Parameters Nph = 44; Dmin = 52.0 km; Rmss = 0.24 seconds; Gp = 244°
M-type = Mw; Version = 5
Event ID NC 71358185 ***This event has been revised.
For updates, maps, and technical information, see:
Event Page
or
USGS Earthquake Hazards Program
CISN Northern California Management Center
U.S. Geological Survey
Berkeley Seismological Laboratory
http://www.cisn.org/ncmc.html