QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

92 km W of Tyonek, Alaska

· 170 km deep · released about 1,300 lb of TNT

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10 km30 km60 km120 km N Kenai Peninsula Borough 92 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 3.1 (ml)
Depth
170 km below the surface
Felt
no reports yet
Nearest
Kenai Peninsula Borough, 92 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2017 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 61.1569, -152.8491. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kenai Peninsula Borough, AK 92 km (57 mi) NNW 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

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

  1. 1.8 61 km WNW of Nikiski, Alaska
  2. 1.9 95 km WNW of Nikiski, Alaska
  3. 1.7 65 km WNW of Nikiski, Alaska
  4. 1.6 69 km WNW of Tyonek, Alaska
  5. 1.5 57 km WNW of Nikiski, Alaska
  6. 1.6 69 km W of Tyonek, Alaska
  7. 1.5 66 km WNW of Tyonek, Alaska
  8. 1.5 63 km W of Tyonek, Alaska
  9. 1.9 94 km NE of Port Alsworth, Alaska
  10. 1.7 65 km WNW of Nikiski, Alaska
  11. 1.5 88 km NE of Port Alsworth, Alaska
  12. 2.3 84 km WNW of Nikiski, Alaska
  13. 1.8 62 km WNW of Nikiski, Alaska
  14. 1.5 67 km WNW of Tyonek, Alaska
  15. 1.6 66 km W of Tyonek, 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.

On USGS

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