QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

25 km SW of Sand Point, Alaska

· 59 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aleutians East Borough 75 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 3.1 (ml)
Depth
59 km below the surface
Felt
no reports yet
Nearest
Aleutians East Borough, 75 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1144 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× more

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 55.1988, -160.8247. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aleutians East Borough, AK 75 km (46 mi) E of here earthquakes near Aleutians East Borough

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

44 earthquakes have been recorded within 50 km since this one.

  1. 1.9 49 km S of Sand Point, Alaska
  2. 1.7 18 km SSE of Sand Point, Alaska
  3. 1.7 41 km S of Sand Point, Alaska
  4. 2.2 6 km NNW of Sand Point, Alaska
  5. 2.3 17 km SW of Sand Point, Alaska
  6. 1.9 37 km NNW of Sand Point, Alaska
  7. 1.9 46 km SW of Sand Point, Alaska
  8. 1.9 14 km N of Sand Point, Alaska
  9. 1.9 48 km SSE of Sand Point, Alaska
  10. 2.0 21 km S of Sand Point, Alaska
  11. 1.9 59 km S of Sand Point, Alaska
  12. 1.8 49 km W of Sand Point, Alaska
  13. 1.6 25 km NNW of Sand Point, Alaska
  14. 2.0 64 km SW of Sand Point, Alaska
  15. 2.0 44 km WSW of Sand Point, Alaska

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.