All earthquakesCalifornia

California earthquakes in 1939

209 earthquakes of magnitude 2.5 or more were located in California in 1939. The largest: M5.5 7 km SW of Hollister, California, Jun 24, 1939.

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

19381940

Map

Where every quake of 1939 was located in California. Select one for its page.

Open the live map with earthquakes

Every quake of 1939

Magnitude 2.5 and up, newest first.

The largest

The 25 largest of 1939 in California.

Month by month

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

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 1939

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.