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ALASKA QUAKEDID THE GROUND SHAKE NEAR YOU?

Southwest Alaska · 53.87°N

Earthquakes near Unalaska / Dutch Harbor

Reading the latest USGS reports for the ground near Unalaska / Dutch Harbor…

Live sections load from the USGS feed. If the feed does not answer, this page says so — it never fills the gap with old numbers.

Recorded USGS earthquakes from the last 7 days, magnitude 2.5 and larger, within 250 km of Unalaska / Dutch Harbor. The dashed pale circle is a true 250 km radius around Unalaska / Dutch Harbor; amber rings are the recorded epicenters, sized by magnitude; small cream squares are the other towns, and the ringed cream marker is Unalaska / Dutch Harbor. If the USGS feed does not answer, the coastline, ring, and marker still show — and no events are plotted.

Most felt near Unalaska / Dutch Harbor — last 7 days, within 250 km

Recent near Unalaska / Dutch Harbor — last 7 days, M1.0 and larger within 250 km, newest first

Every event links to its USGS event page, the authority for that earthquake. Distances are measured from Unalaska / Dutch Harbor, not copied from the feed's place names.

The biggest on record near Unalaska / Dutch Harbor — USGS catalog, as recorded

The five largest earthquakes recorded within 200 km of Unalaska / Dutch Harbor since 1900, from USGS catalog pulls made November 8, 2026. Pre-instrumental magnitudes are estimates, and catalog completeness varies by era — the fine print is on the about page.

How often does the ground move here?

326 earthquakes of M4.0 or larger were recorded within 200 km in the last 10 years — one of the most active rates. Since 1900 the catalog holds 1685 M4-or-larger events within the same radius.

Unalaska and Dutch Harbor sit mid-arc on the Aleutian megathrust, in one of the most earthquake-active corridors on Earth: more than 1,600 M4-or-larger events within 200 km in the catalog, including the 1957 Andreanof M8.6 to the west and 1996 Delarof M7.9 nearby.

Southwest Alaska — why it shakes

From Kodiak Island west, the Aleutian megathrust takes over. The Pacific Plate dives beneath the island arc here at several centimeters a year, and the locked segments let go in some of the planet's largest earthquakes — 1946 (Unimak, M8.6), 1957 (Andreanof Islands, M8.6), and 2021 (Chignik, M8.2) all ruptured this stretch. Between the great ones, the arc crackles almost daily with small and moderate events.

New to the numbers? What magnitude means explains the scale in plain words — including why a whole step is about 32 times the energy, and why what people feel is not the same as damage.

Unalaska / Dutch Harbor on the sister sites

Daylight in Unalaska / Dutch Harbor — sunrise, sunset, and day length.

Aurora over Unalaska / Dutch Harbor — tonight's northern lights outlook.

Unalaska — the nearest tide station in the fleet's inventory, 1 km from Unalaska / Dutch Harbor.