Significant earthquakes of 1927

October 24, 1927 Earthquake: SE Alaska, Alaska, United States

October 24, 1927 · M7.1

A magnitude 7.1 earthquake struck SE Alaska, Alaska, United States on October 24, 1927 at 15:59:44 UTC, 0 km below the surface. It caused a tsunami.

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
October 24, 1927
Time
15:59:44 UTC
Place
SE Alaska, Alaska, United States
Magnitude
7.1 (Ms)
Focal depth
0 km (0 mi)
Intensity
7 on the Modified Mercalli scale
Epicenter
57.690° N, 136.070° W

The toll

Damage
Limited (under about $1 million)

Where the literature gives no number, NCEI records a description on a scale of 1 to 4, printed here in its words. Damage is in millions of US dollars of the year of the event, not adjusted for inflation.

What the record says

NCEI’s account, from the sources it cites.

Submarine cables were broken between Petersburg and Wrangell and between Juneau and Skagway. At Sitka, cracks formed in buildings and people were thrown from their feet. Near Hoonah, water in Icy Stratis was "churned and muddy" and strong "tide rips" were reported on Cross Sound. A few windows were broken at Juneau and several hundred were broken at Petersburg. At Seattle, Wash., small waves were observed on water in swimming pools. Felt throughout southeast Alaska, west to Cordova, and to the north of Fairbanks. (reference #542)

1927, October 24, 8:00 local time (16:00 UTC). There was a strong earthquake, affecting the entire southeastern prominence of Alaska and adjacent regions of Canada. The tremors were felt on the coast at least from Lynn Canal to Wiah Point. At Chichagof and Soapstone Point, window panes were shattered and a water main was broken. At Sitkan, clocks stopped, dishes rattled, and cracks appeared in building walls. Several windows were rattled at Petersburg. Slight damage was done at Wrangell. At Juneau, hanging objects swayed. Small waves were observed in swimming pools in Seattle. There was damage to buildings at the settlements of Steel Creek and Chicken [?], but there were no casualties, since the residents, warned by the rumbling had taken to the streets. The earthquake may have been noticed to the north of Fairbanks. The underwater army cable between Ketchican and Wrangell was broken near Wrangell. The cables were also broken between Petersburg and Wrangell, and between Juneau and Skagway. According to Bois' survey (1928), a "solitary" wave reached the Hawaiian Islands (Reference #415).

Other significant earthquakes nearby

Within 200 km, the deadliest first.

More

Significant earthquakes of 1927The 1900sEvery quake the USGS located in 1927Recent 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 2026-09-24. NCEI earthquake 7442.