QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

87 km ESE of King Salmon, Alaska

· 129 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake and Peninsula Borough 76 kmBristol Bay Borough 107 kmKodiak Island Borough 111 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 1.5 (ml)
Depth
129 km below the surface
Felt
no reports yet
Nearest
Lake and Peninsula Borough, 76 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2199 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 58.4131, -155.2547. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake and Peninsula Borough, AK 76 km (47 mi) ENE of here earthquakes near Lake and Peninsula Borough
Bristol Bay Borough, AK 107 km (66 mi) ESE of here earthquakes near Bristol Bay Borough
Kodiak Island Borough, AK 111 km (69 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

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

  1. 1.5 57 km NNW of Karluk, Alaska
  2. 1.7 81 km NW of Karluk, Alaska
  3. 2.3 87 km NNW of Karluk, Alaska
  4. 2.6 50 km E of King Salmon, Alaska
  5. 2.1 89 km N of Karluk, Alaska
  6. 1.6 84 km NW of Karluk, Alaska
  7. 2.9 73 km SE of King Salmon, Alaska
  8. 2.0 93 km E of King Salmon, Alaska
  9. 1.6 85 km NNW of Karluk, Alaska
  10. 2.6 68 km S of Kokhanok, Alaska
  11. 1.7 78 km NW of Karluk, Alaska
  12. 1.8 92 km SSE of Igiugig, Alaska
  13. 1.9 59 km NW of Karluk, Alaska
  14. 1.8 86 km NNW of Karluk, Alaska
  15. 1.6 100 km NNW of Karluk, 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 5.2 on 2019-01-22 — it released about 350,000 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.