M5.5

USGS earthquake · M5.5100 km S of Nikolski, Alaska

🇺🇸 - United States

· 2 days ago

Map centered on the earthquake at 100 km S of Nikolski, Alaska, with a marker at its epicenterNikolskiOpen in Apple Maps ↗
Shaking intensity
  1. II
  2. III
  3. IV
  4. V
  5. VI

Strongest contour: Strong (VI). Modelled by USGS ShakeMap; contours show where shaking was expected to reach each level, not damage.

Depth10.0 km
Origin timeSep 3, 2026, 8:21 PM UTC
Coordinates52.051, -169.139
Tsunami flagNot reported
Estimated shakingWeak (III)Modelled by USGS ShakeMap
Magnitude scaleMoment magnitude
SolutionReviewed by a seismologist
Who felt it

People in the shaking

In the modelled area2
At light shaking or aboveNone modelled
  1. IIIWeak2
Nearby towns and the shaking modelled for each
PlacePopulationShaking
Nikolski17III

Past earthquakes here. A magnitude 6.9 earthquake 201 km nw of this event struck UK on February 27, 1987 (UTC), with estimated population exposures of 2,000 at intensity V and 2,000 at intensity VI, with no reported fatalities.

Local buildings. Overall, the population in this region resides in structures that are resistant to earthquake shaking, though vulnerable structures exist. The predominant vulnerable building types are unreinforced brick masonry and reinforced masonry construction.

Population and intensity modelled by USGS PAGER. Estimates, not a count of people affected.

Official source

U.S. Geological Survey

Terremoto preserves this event snapshot for a stable public link. USGS remains the authoritative source for revisions and scientific details. Shaking contours and population estimates come from USGS ShakeMap and PAGER, which revise them as more data arrives.

View the USGS record ↗