Significant earthquakes of 1909

April 10, 1909 Earthquake: Aleutian Islands, Alaska, United States

April 10, 1909 · M7.8

A magnitude 7.8 earthquake struck Aleutian Islands, Alaska, United States on April 10, 1909 at 19:36 UTC.

Map

Where it struck, with the other significant earthquakes within 200 km. Circles are sized and colored by magnitude; select one for its page.

The earthquake

Date
April 10, 1909
Time
19:36 UTC
Place
Aleutian Islands, Alaska, United States
Magnitude
7.8 (Ms)
Tsunami
None recorded
Epicenter
52.000° N, 175.000° E
Region
North America and Hawaii

The toll

The record gives no deaths, injuries or damage for this earthquake.

What the record says

NCEI’s account, from the sources it cites.

April 10, 1909, 19:36 UTC, 52 N, 175 E, magnitude 7.0 Ms. (reference #542)

April 10, 1909, 19:36 UTC, 45 N, 165 E, magnitude 7.8 MS. (reference #88)

Sources NCEI cites

The publications NCEI lists for this record. The numbers match the “reference #” notes in its account above.

  1. #88 Duda, Seweryn J. (1965). Secular seismic energy release in the circum-Pacific belt. Tectonophysics, vol. 2, no. 5, p. 409-452. DOI:10.1016/0040-1951(65)90035-1
  2. #542 Stover, Carl W., and Jerry L. Coffman (1993). Seismicity of the United States, 1568-1989 (Revised), U.S. Geological Survey Professional Paper 1527, United States Government Printing Office, Washington, D.C., 418 p.

Other significant earthquakes nearby

Within 200 km, the deadliest first.

More

Significant earthquakes of 1909The 1900sEvery quake the USGS located in 1909Recent earthquakes near hereThis day in weather history

Sources

Significant earthquakes from NOAA’s National Centers for Environmental Information, Global Historical Hazard Database, cited as NCEI/WDS, doi:10.7289/V5PN93H7. Public domain. Read 2026-10-01. NCEI earthquake 2860.