QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

37 km NW of Beluga, Alaska

· 79 km deep · released about 1,300 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 3.1 (ml)
Depth
79 km below the surface
Felt
no reports yet
Nearest
Kenai Peninsula Borough, 122 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 675 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 61.3960, -151.5439. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kenai Peninsula Borough, AK 122 km (76 mi) NNE of here earthquakes near Kenai Peninsula Borough
Matanuska-Susitna Borough, AK 144 km (90 mi) SW of here earthquakes near Matanuska-Susitna 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. 2.1 31 km W of Susitna, Alaska
  2. 1.5 49 km NW of Beluga, Alaska
  3. 1.5 36 km SSW of Skwentna, Alaska
  4. 1.5 3 km E of Beluga, Alaska
  5. 1.5 33 km WNW of Tyonek, Alaska
  6. 2.4 49 km SSW of Skwentna, Alaska
  7. 1.5 38 km W of Susitna, Alaska
  8. 1.5 35 km NW of Beluga, Alaska
  9. 1.7 54 km SSW of Skwentna, Alaska
  10. 1.6 42 km NNW of Beluga, Alaska
  11. 1.5 49 km W of Tyonek, Alaska
  12. 2.8 32 km SSW of Skwentna, Alaska
  13. 2.6 50 km SW of Skwentna, Alaska
  14. 1.7 54 km SSW of Skwentna, Alaska
  15. 1.5 10 km NNW of Beluga, 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 4.6 on 2023-05-13 — 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.