QuakeIndex

Earthquake · reviewed by a seismologist

M 4.3ml

29 km SE of Seldovia Village, Alaska

· 45 km deep · released about 43 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 4.3 (ml)
Depth
45 km below the surface
Felt
18 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Kenai Peninsula Borough, 132 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1139 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 18 people have reported feeling it to USGS.

How big was it?

This earthquake released about 43 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 4,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 180× the energy of this one
  3. Magna, Utah 2020 M 5.7 130× the energy of this one
  4. This earthquake M 4.3 about 43 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 89× 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 59.3125, -151.2416. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kenai Peninsula Borough, AK 132 km (82 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

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

  1. 2.2 6 km SSE of Halibut Cove, Alaska
  2. 1.8 43 km SE of Port Graham, Alaska
  3. 2.2 1 km SE of Halibut Cove, Alaska
  4. 1.6 27 km S of Port Graham, Alaska
  5. 2.4 51 km SE of Port Graham, Alaska
  6. 2.0 1 km SSW of Seldovia, Alaska
  7. 1.9 15 km E of Halibut Cove, Alaska
  8. 2.1 24 km SSE of Halibut Cove, Alaska
  9. 2.0 3 km SSE of Kachemak, Alaska
  10. 1.5 10 km W of Diamond Ridge, Alaska
  11. 2.1 64 km SE of Port Graham, Alaska
  12. 1.7 Kenai Peninsula, Alaska
  13. 1.7 26 km ESE of Halibut Cove, Alaska
  14. 3.3 8 km N of Seldovia Village, Alaska
  15. 2.4 1 km NE of Kachemak, 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.