Moderate mag. 4.9 earthquake - Ryer Island, 1 mi west of Antioch, Contra Costa County, California, USA, on Friday, September 10, 1965 at 21:28 (GMT)
Moderate magnitude 4.9 earthquake at 0 km depth
Depth: 0.0 km
Epicenter latitude / longitude: 38.01°N / 121.823°W (Contra Costa County, California, United States)
Antipode: 38.01°S / 58.177°E
Nearest volcano: Sutter Buttes (133 km / 83 mi)
Nearby towns and cities:
2 km (1 mi) WNW of Antioch (pop: 110,500) --> See nearby quakes!
6 km (4 mi) ESE of New York of the Pacific (pop: 69,400) --> See nearby quakes!
10 km (6 mi) W of Oakley (pop: 39,800) --> See nearby quakes!
14 km (9 mi) NW of Brentwood (pop: 59,000) --> See nearby quakes!
19 km (12 mi) ENE of Concord (pop: 128,700) --> See nearby quakes!
24 km (15 mi) ENE of Walnut Creek (pop: 68,900) --> See nearby quakes!
33 km (20 mi) SE of Fairfield (pop: 113,000) --> See nearby quakes!
59 km (36 mi) ENE of San Francisco (pop: 864,800) --> See nearby quakes!
70 km (43 mi) SSW of Sacramento (pop: 490,700) --> See nearby quakes!
75 km (47 mi) N of San Jose (pop: 1,026,900) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.4 x 1012 joules (392 megawatt hours, equivalent to 338 tons of TNT) | about seismic energy
Data for the same earthquake reported by different agencies
Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
|4.9||0 km||San Francisco Bay area, California (USA)||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.