QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

21 km ENE of Halibut Cove, Alaska

· 41 km deep · released about 5.4 lb of TNT

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10 km30 km60 km120 km N Kenai Peninsula 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
41 km below the surface
Felt
no reports yet
Nearest
Kenai Peninsula Borough, 111 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1531 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 59.6712, -150.8844. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kenai Peninsula Borough, AK 111 km (69 mi) SE 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

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

  1. 1.8 25 km S of Halibut Cove, Alaska
  2. 1.5 30 km ENE of Fox River, Alaska
  3. 1.6 Kenai Peninsula, Alaska
  4. 4.7 48 km SE of Halibut Cove, Alaska
  5. 1.6 Kenai Peninsula, Alaska
  6. 1.8 8 km S of Fritz Creek, Alaska
  7. 1.6 14 km NW of Fox River, Alaska
  8. 1.6 5 km W of Halibut Cove, Alaska
  9. 2.0 33 km E of Halibut Cove, Alaska
  10. 1.8 Kenai Peninsula, Alaska
  11. 1.9 Kenai Peninsula, Alaska
  12. 1.5 11 km SSW of Fox River, Alaska
  13. 1.9 20 km SE of Fox River, Alaska
  14. 2.5 24 km NNE of Fox River, Alaska
  15. 1.7 38 km SE of Fox River, 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 4.3 on 2018-07-13 — it released about 16,000 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.