Temblor Felt in South of Market

by Robert B. Livingston (gruaudemais [at] yahoo.com)

Thu, Mar 1, 2007 8:40PM

Abrupt single quake felt at approx 8:40 PM South of Market

Here are first details:

Magnitude 4.2 - regional moment magnitude (Mw)
Time Thursday, March 1, 2007 at 8:40:00 PM (PST)
Friday, March 2, 2007 at 4:40:00 (UTC)
Distance from Lafayette, CA - 2 km (1 miles) NE (47 degrees)
Walnut Creek, CA - 5 km (3 miles) WSW (257 degrees)
Pleasant Hill, CA - 6 km (4 miles) SSW (202 degrees)
Concord, CA - 10 km (6 miles) SW (225 degrees)
San Francisco City Hall, CA - 31 km (20 miles) ENE (63 degrees)
Coordinates 37 deg. 54.1 min. N (37.901N), 122 deg. 5.9 min. W (122.098W)
Depth 16.6 km (10.3 miles)
Location Quality Excellent
Location Quality Parameters Nst=250, Nph=250, Dmin=3 km, Rmss=0.14 sec, Erho=0.1 km, Erzz=0.2 km, Gp=43.2 degrees

For more information: http://quake.wr.usgs.gov/recenteqs/Quakes/...

§Instrumental Intensity

by map

Fri, Mar 2, 2007 7:42AM