QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

93 km ESE of Halibut Cove, Alaska

· 25 km deep · released about 7.6 lb 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 1.6 (ml)
Depth
25 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 666 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 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 59.1985, -149.7658. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.4 99 km SE of Halibut Cove, Alaska
  2. 3.0 118 km SE of Halibut Cove, Alaska
  3. 2.1 81 km SE of Halibut Cove, Alaska
  4. 3.0 51 km SE of Fox River, Alaska
  5. 2.4 75 km SE of Halibut Cove, Alaska
  6. 2.4 99 km S of Lowell Point, Alaska
  7. 2.3 61 km SE of Fox River, Alaska
  8. 2.0 54 km ESE of Fox River, Alaska
  9. 2.0 74 km ESE of Halibut Cove, Alaska
  10. 2.2 106 km SE of Halibut Cove, Alaska
  11. 2.4 124 km S of Lowell Point, Alaska
  12. 1.7 65 km SE of Fox River, Alaska
  13. 1.9 112 km SE of Halibut Cove, Alaska
  14. 2.0 77 km SE of Halibut Cove, Alaska
  15. 2.2 70 km SSW of Lowell Point, 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 4.2 on 2024-07-10 — 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.