QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4ml

22 km S of Halibut Cove, Alaska

· 37 km deep · released about 1.9 tons 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 3.4 (ml)
Depth
37 km below the surface
Felt
2 reports · strongest reported intensity II
Measured shaking
intensity III (ShakeMap)
Nearest
Kenai Peninsula Borough, 126 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 47 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.9 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 89,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,800× the energy of this one
  4. This earthquake M 3.4 about 1.9 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 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 59.3940, -151.1630. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kenai Peninsula Borough, AK 126 km (78 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

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

  1. 1.3 4 km WSW of Diamond Ridge, Alaska
  2. 1.7 6 km S of Fritz Creek, Alaska
  3. 2.5 18 km SE of Fox River, Alaska
  4. 1.6 11 km SSE of Fox River, Alaska
  5. 1.7 3 km NW of Kachemak, Alaska
  6. 1.9 7 km NNW of Fritz Creek, Alaska
  7. 1.5 10 km NW of Fritz Creek, Alaska
  8. 1.7 8 km NW of Diamond Ridge, Alaska
  9. 1.8 6 km W of Diamond Ridge, Alaska
  10. 1.7 6 km ENE of Fritz Creek, Alaska
  11. 1.6 18 km SE of Port Graham, Alaska
  12. 2.0 11 km NE of Fritz Creek, Alaska
  13. 1.6 8 km ESE of Nikolaevsk, Alaska
  14. 2.0 28 km SSE of Halibut Cove, Alaska
  15. 2.8 5 km NNW of Diamond Ridge, 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 4.9 on 2024-01-07 — it released about 180 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.