1940
5 tropical cyclones near the U.S., 19 notable earthquakes.
Tropical cyclones
Storms whose tracks came within 100 miles of a U.S. county.
Earthquakes
Magnitude 5 or more in the lower 48 and Hawaii, 6.5 or more in Alaska, strongest first.
| Apr 15, 1940 | 7.0 | near Attu Station, Alaska Aleutians West AK |
| Apr 15, 1940 | 7.0 | near Attu Station, Alaska Aleutians West AK |
| May 18, 1940 | 6.9 | Imperial Valley, California Imperial CA |
| Mar 27, 1940 | 6.6 | near Adak, Alaska Aleutians West AK |
| Jun 16, 1940 | 6.4 | near Honomu, Hawaii Hawaii HI |
| Dec 20, 1940 | 6.0 | near Shelter Cove, California Humboldt CA |
| Jul 15, 1940 | 5.6 | near Laup?hoehoe, Hawaii Hawaii HI |
| Sep 1, 1940 | 5.6 | near Hana, Hawaii Maui HI |
| Dec 24, 1940 | 5.6 | near Tamworth, New Hampshire Carroll NH |
| May 18, 1940 | 5.4 | near Imperial, CA Imperial CA |
| May 17, 1940 | 5.3 | near Joshua Tree, CA San Bernardino CA |
| Dec 20, 1940 | 5.3 | near Tamworth, New Hampshire Carroll NH |
| May 17, 1940 | 5.2 | near Joshua Tree, CA San Bernardino CA |
| May 18, 1940 | 5.2 | near Imperial, CA Imperial CA |
| May 18, 1940 | 5.2 | near Imperial, CA Imperial CA |
| May 18, 1940 | 5.2 | near Imperial, CA Imperial CA |
| Oct 27, 1940 | 5.1 | Olympic Peninsula, Washington Mason WA |
| Mar 10, 1940 | 5.0 | near Alamo, Nevada Lincoln NV |
| Jun 4, 1940 | 5.0 | near Pine Valley, CA San Diego CA |
Drought
On average 19% of lower-48 counties were in severe drought in 1940. The worst month was January 1940, with 38%.
Storm Prediction Center, National Hurricane Center HURDAT2, Monitoring Trends in Burn Severity, NOAA Storm Events Database, USGS Comprehensive Earthquake Catalog, NOAA nClimDiv Palmer Drought Severity Index. Damage is as reported at the time, not adjusted for inflation.
Drought · 1940
How the 1940 drought spread
Every county’s Palmer reading, month by month, from July 1939 to December 1940.