QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

25 km S of Halibut Cove, Alaska

· 46 km deep · released about 7.6 lb of TNT

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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 1.6 (ml)
Depth
46 km below the surface
Felt
no reports yet
Nearest
Kenai Peninsula Borough, 127 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2143 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 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 59.3672, -151.2151. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kenai Peninsula Borough, AK 127 km (79 mi) SSE of here earthquakes near Kenai Peninsula Borough

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

Aftershocks so far

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

  1. 1.6 7 km SW of Halibut Cove, Alaska
  2. 2.9 3 km ENE of Kachemak, Alaska
  3. 1.5 3 km NW of Seldovia Village, Alaska
  4. 1.9 20 km SSE of Fox River, Alaska
  5. 1.7 10 km S of Fox River, Alaska
  6. 1.6 9 km S of Halibut Cove, Alaska
  7. 2.5 16 km ESE of Seldovia Village, Alaska
  8. 1.6 13 km SW of Halibut Cove, Alaska
  9. 1.9 3 km NNE of Diamond Ridge, Alaska
  10. 1.9 11 km SSW of Halibut Cove, Alaska
  11. 2.1 13 km SSW of Halibut Cove, Alaska
  12. 2.1 68 km SE of Port Graham, Alaska
  13. 1.9 2 km NNW of Kachemak, Alaska
  14. 2.1 3 km ESE of Homer, Alaska
  15. 1.5 2 km SW of Fritz Creek, 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 4.3 on 2018-07-13 — it released about 11,000 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.