The December 22, 1943 earthquake
M5.1near Amboy, CA
A magnitude 5.1 earthquake 3.7 miles deep, centred in San Bernardino County. The 381st strongest in California’s record since 1900, and the strongest within 50 miles since a magnitude 5.2 on May 17, 1940.
The earthquake
- Magnitude
- 5.1
- local magnitude (ml)
- Depth
- 3.7 mi
- 6.0 km below the surface
- Local time
- Wednesday, December 22, 1943
- 08:50 PWT; 15:50 UTC
- In California’s record
- 381st
- strongest of 97,065 since 1900
USGS ANSS Comprehensive Earthquake Catalog, event ci3366459 (“22km SSW of Amboy, CA”). The USGS event page carries the ShakeMap, felt reports and the official summary.
Counties and cities within 50 miles
Distance from the epicentre to each county boundary (zero when inside) and to each city centre.
Counties
- San Bernardino CountyCA · inside
- Riverside CountyCA · 35.1 mi
Cities, largest first
- Twentynine PalmsCA · 20.9 mi
- Yucca ValleyCA · 38.4 mi
Earthquakes around the epicentre
2,056 earthquakes of magnitude 3 or more within 50 miles of this epicentre since 1973.
Earlier earthquakes of magnitude 5 or more within 50 miles, strongest first
- April 3, 1926M5.5
- May 17, 1940M5.3
- May 17, 1940M5.2
- September 5, 1928M5.0
USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.