| MAP | 6.0 | 2010/02/04 20:20:22 | 40.431 | -124.929 | 11.2 | 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
MAINSHOCK
Magnitude : 5.95 Mw (A strong quake)
Time : 04 Feb 2010 00:20:21 PM, PST
: 04 Feb 2010 20:20:21 GMT
Coordinates : 40 deg. 25.85 min. N, 124 deg. 55.75 min. W
: 40.4308 N, 124.9292 W
Depth : 7.0 miles ( 11.2 km)
Quality : Good
Location : 34 mi. ( 55 km) WNW from Petrolia, CA
: 47 mi. ( 76 km) WSW from Eureka, CA
Event ID : NC 71348851
STRONG AFTERSHOCKS (Magnitude 5 and larger) -
At this time (immediately after the mainshock) the probability of a strong and possibly damaging aftershock IN THE NEXT 7 DAYS is approximately 53 PERCENT
EARTHQUAKES LARGER THAN THE MAINSHOCK -
Most likely, the recent mainshock will be the largest in the sequence. However, there is a small chance (APPROXIMATELY 5 TO 10 PERCENT) of an earthquake equal to or larger than this mainshock in the next 7 days.
WEAK AFTERSHOCKS (Magnitude 3 to 5) -
In addition, approximately 30 to 70 SMALL AFTERSHOCKS are expected in the same 7-DAY PERIOD and may be felt locally.
To: U.S. West Coast, Alaska, and British Columbia coastal regions
From: NOAA/NWS/West Coast and Alaska Tsunami Warning Center
Subject: Tsunami Information Statement issued 02/4/2010 at 12:23PM PST
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.
