QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

2 km SW of Halibut Cove, Alaska

· 17 km deep · released about 11 lb of TNT

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10 km30 km60 km120 km N Kenai Peninsula Borough 106 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 1.7 (ml)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Kenai Peninsula Borough, 106 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1280 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 59.5826, -151.2537. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kenai Peninsula Borough, AK 106 km (66 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

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

  1. 2.0 8 km N of Halibut Cove, Alaska
  2. 2.3 4 km ENE of Nikolaevsk, Alaska
  3. 2.1 25 km ESE of Halibut Cove, Alaska
  4. 2.1 Kenai Peninsula, Alaska
  5. 2.2 20 km NNW of Fox River, Alaska
  6. 2.4 Kenai Peninsula, Alaska
  7. 2.6 6 km ENE of Nikolaevsk, Alaska
  8. 1.5 9 km ENE of Happy Valley, Alaska
  9. 1.7 Kenai Peninsula, Alaska
  10. 1.6 15 km SSE of Port Graham, Alaska
  11. 1.5 4 km NW of Diamond Ridge, Alaska
  12. 1.6 8 km SE of Port Graham, Alaska
  13. 1.5 12 km ESE of Ninilchik, Alaska
  14. 1.9 11 km WNW of Fox River, Alaska
  15. 3.3 3 km SSW of Happy Valley, 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 7,900 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.