QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7mb

101 km SE of King Cove, Alaska

· 9.3 km deep · released about 5.4 tons of TNT

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10 km30 km60 km120 km N Aleutians East Borough 105 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 3.7 (mb)
Depth
9.3 km below the surface
Felt
no reports yet
Measured shaking
intensity I (ShakeMap)
Nearest
Aleutians East Borough, 105 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 660 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 5.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 32,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,000× the energy of this one
  4. This earthquake M 3.7 about 5.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 11× 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 54.4312, -161.1753. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aleutians East Borough, AK 105 km (65 mi) SSE 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

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

  1. 3.8 109 km SSW of Sand Point, Alaska
  2. 2.2 85 km SSE of King Cove, Alaska
  3. 2.8 80 km SSE of King Cove, Alaska
  4. 3.8 113 km SSW of Sand Point, Alaska
  5. 1.8 63 km SE of King Cove, Alaska
  6. 1.5 95 km SSE of King Cove, Alaska
  7. 1.5 88 km SSE of King Cove, Alaska
  8. 1.9 88 km SE of King Cove, Alaska
  9. 1.6 68 km SSW of Sand Point, Alaska
  10. 4.1 117 km SSW of Sand Point, Alaska
  11. 2.6 76 km SE of King Cove, Alaska
  12. 1.9 85 km SE of King Cove, Alaska
  13. 2.4 78 km ESE of King Cove, Alaska
  14. 3.0 57 km SE of King Cove, Alaska
  15. 1.9 65 km SE of King Cove, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 7.2 on 2023-07-16 — it released about 180,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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