The May 27, 1947 earthquake
M5.2near Ferndale, California
A magnitude 5.2 earthquake, 15.6 miles off Humboldt County. The 328th strongest in California’s record since 1900, and the strongest within 50 miles since a magnitude 6.5 on October 3, 1941.
The earthquake
- Magnitude
- 5.2
- local magnitude (ml)
- Depth
- —
- Not recorded
- Local time
- Tuesday, May 27, 1947
- 12:59 PST; 20:59 UTC
- In California’s record
- 328th
- strongest of 97,065 since 1900
USGS ANSS Comprehensive Earthquake Catalog, event ushis1581 (“41 km WSW of Ferndale, 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
- Humboldt CountyCA · 15.6 mi
- Mendocino CountyCA · 45.1 mi
Earthquakes around the epicentre
2,435 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
- January 22, 1923M7.1
- February 9, 1941M6.8
- October 3, 1941M6.5
- June 6, 1932M6.5
- April 23, 1906M6.4
- March 18, 1910M6.0
- October 28, 1909M6.0
- December 20, 1940M6.0
- February 6, 1937M5.9
- September 11, 1938M5.8
USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.