QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

149 km SSE of King Cove, Alaska

· 9.2 km deep · released about 950 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 3.0 (ml)
Depth
9.2 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2465 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 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 350,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 11,000× the energy of this one
  4. This earthquake M 3.0 about 950 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 53.7684, -161.6690. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.8 123 km S of King Cove, Alaska
  2. 2.4 125 km SSE of King Cove, Alaska
  3. 2.3 174 km SSE of King Cove, Alaska
  4. 2.5 119 km S of King Cove, Alaska
  5. 3.0 125 km S of King Cove, Alaska
  6. 2.9 190 km S of King Cove, Alaska
  7. 3.0 145 km SSE of King Cove, Alaska
  8. 2.5 105 km SSE of King Cove, Alaska
  9. 2.6 Alaska Peninsula
  10. 3.1 south of Alaska
  11. 1.9 101 km SSE of King Cove, Alaska
  12. 2.7 151 km SSE of King Cove, Alaska
  13. 2.1 173 km S of King Cove, Alaska
  14. 1.8 139 km SSE of King Cove, Alaska
  15. 1.6 113 km S of King Cove, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.