QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

146 km S of King Cove, Alaska

· 10 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N
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 2.6 (ml)
Depth
10 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 862 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 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 53.7570, -161.9687. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.6 169 km SSE of False Pass, Alaska
  2. 2.5 111 km S of King Cove, Alaska
  3. 3.0 108 km S of King Cove, Alaska
  4. 2.8 105 km SE of False Pass, Alaska
  5. 2.5 130 km S of King Cove, Alaska
  6. 2.6 149 km S of King Cove, Alaska
  7. 2.2 128 km SSE of King Cove, Alaska
  8. 2.2 166 km S of King Cove, Alaska
  9. 4.4 185 km S of King Cove, Alaska
  10. 2.2 135 km S of King Cove, Alaska
  11. 2.7 126 km SSE of King Cove, Alaska
  12. 2.6 113 km S of King Cove, Alaska
  13. 2.4 169 km SSE of King Cove, Alaska
  14. 2.4 145 km SSE of False Pass, Alaska
  15. 2.7 190 km SSE of False Pass, 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 4.0 on 2021-10-02 — it released about 130 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.