The July 22, 1923 earthquake
M6.2near San Bernardino, California
A magnitude 6.2 earthquake 3.1 miles deep, centred in San Bernardino County. The 47th strongest in California’s record since 1900, and the strongest within 50 miles since a magnitude 6.7 on April 21, 1918.
The earthquake
- Magnitude
- 6.2
- moment magnitude (mw)
- Depth
- 3.1 mi
- 5.0 km below the surface
- Local time
- Sunday, July 22, 1923
- 23:30 PST; 07:30 UTC on Jul 23, 1923
- In California’s record
- 47th
- strongest of 97,065 since 1900
USGS ANSS Comprehensive Earthquake Catalog, event iscgem911466 (“3 km SE of San Bernardino, California”). 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 · 5.3 mi
- Los Angeles CountyCA · 26.1 mi
- Orange CountyCA · 27.9 mi
- San Diego CountyCA · 40.8 mi
Cities, largest first
- AnaheimCA · 32.9 mi
- RiversideCA · 12.9 mi
- IrvineCA · 40.8 mi
- Santa AnaCA · 43.3 mi
- San BernardinoCA · 4.1 mi
- FontanaCA · 11.8 mi
- Moreno ValleyCA · 11.9 mi
- OntarioCA · 20.2 mi
- Rancho CucamongaCA · 17.8 mi
- Garden GroveCA · 45.6 mi
- CoronaCA · 23.5 mi
- PomonaCA · 28.8 mi
Earthquakes around the epicentre
1,995 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 21, 1918M6.7
- May 15, 1910M6.0
- September 19, 1907M5.3
- April 10, 1910M5.0
- May 12, 1910M5.0
- June 6, 1918M5.0
USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.