All earthquakesCalifornia

California earthquakes in 1915

9 earthquakes of magnitude 2.5 or more were located in California in 1915. The largest: M6.4 187 km W of Trinidad, California, Dec 31, 1915.

From the USGS catalog. Times are local to each quake.

19141916

Map

Where every quake of 1915 was located in California. Select one for its page.

Open the live map with earthquakes

Every quake of 1915

Magnitude 2.5 and up, newest first.

Month by month

Counted by UTC date, which is how the catalog files them.

MonthQuakesLargestWhere
January 191515.7Near Los Alamos, California
February 19150
March 19150
April 191525.0Near Coleville, California
May 191526.3237 km WSW of Ferndale, California
June 191526.0The 1915 Imperial Valley, California Earthquakes (First Major Event)
July 19150
August 19150
September 19150
October 191514.5Near Piedmont, California
November 19150
December 191516.4187 km W of Trinidad, California

What this means

The catalog is only as complete as the instruments of the time. Worldwide coverage of magnitude 5 and up dates from the 1960s, and of 4.5 from the 1990s; earlier years hold the large quakes and the ones near a station, so a low count in an early year means fewer instruments, not a quiet earth.

By year

Every year the USGS catalog covers.

Nearby

California nowWorldwide in 1915

Sources

Earthquakes, magnitudes, depths, shaking estimates and felt reports from the U.S. Geological Survey Earthquake Hazards Program, read from its live feeds and its catalog back to 1900. Tsunami messages from NOAA’s tsunami warning centers.