QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

90 km E of King Salmon, Alaska

· 140 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake and Peninsula Borough 95 kmBristol Bay Borough 110 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 2.8 (ml)
Depth
140 km below the surface
Felt
no reports yet
Nearest
Lake and Peninsula Borough, 95 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1145 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 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 58.6121, -155.1037. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake and Peninsula Borough, AK 95 km (59 mi) NE of here earthquakes near Lake and Peninsula Borough
Bristol Bay Borough, AK 110 km (68 mi) E of here earthquakes near Bristol Bay Borough
Kodiak Island Borough, AK 123 km (76 mi) NW of here earthquakes near Kodiak Island Borough

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

Aftershocks so far

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

  1. 2.0 73 km ESE of King Salmon, Alaska
  2. 1.7 94 km N of Karluk, Alaska
  3. 2.2 86 km NNW of Karluk, Alaska
  4. 2.0 80 km E of King Salmon, Alaska
  5. 2.2 87 km S of Kokhanok, Alaska
  6. 1.6 86 km NNW of Karluk, Alaska
  7. 2.5 66 km S of Kokhanok, Alaska
  8. 1.5 87 km NW of Karluk, Alaska
  9. 1.7 86 km NNW of Karluk, Alaska
  10. 2.2 60 km E of King Salmon, Alaska
  11. 2.0 93 km N of Karluk, Alaska
  12. 1.8 73 km E of King Salmon, Alaska
  13. 1.8 85 km NNW of Karluk, Alaska
  14. 2.1 88 km E of King Salmon, Alaska
  15. 2.0 86 km E of King Salmon, 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.