QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

77 km ESE of King Cove, Alaska

· 13 km deep · released about 5.4 lb of TNT

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10 km30 km60 km120 km N Aleutians East Borough 73 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 1.5 (ml)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Aleutians East Borough, 73 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2222 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 lb of TNT

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 54.7464, -161.2438. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aleutians East Borough, AK 73 km (46 mi) SE 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

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

  1. 2.3 88 km SE of King Cove, Alaska
  2. 1.8 103 km SSW of Sand Point, Alaska
  3. 2.7 91 km SSW of Sand Point, Alaska
  4. 2.1 88 km SE of King Cove, Alaska
  5. 1.7 90 km SE of King Cove, Alaska
  6. 2.2 81 km SE of King Cove, Alaska
  7. 1.7 109 km SE of King Cove, Alaska
  8. 1.6 86 km SSW of Sand Point, Alaska
  9. 1.6 82 km ESE of King Cove, Alaska
  10. 1.7 78 km SSW of Sand Point, Alaska
  11. 2.0 91 km SSW of Sand Point, Alaska
  12. 2.6 73 km ESE of King Cove, Alaska
  13. 2.7 90 km SE of King Cove, Alaska
  14. 1.9 88 km SSW of Sand Point, Alaska
  15. 1.6 73 km SSW 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.

For this area

The largest earthquake within 50 km in our catalogue was M 6.1 on 2020-07-28 — it released about 7,900,000 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.