QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

109 km ESE of Yakutat, Alaska

· 9.2 km deep · released about 60 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 2.2 (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 1493 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 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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 59.0732, -138.0469. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 1.9 British Columbia, Canada
  2. 3.3 119 km ESE of Yakutat, Alaska
  3. 1.9 British Columbia, Canada
  4. 3.7 118 km ESE of Yakutat, Alaska
  5. 1.6 British Columbia, Canada
  6. 1.8 91 km NW of Elfin Cove, Alaska
  7. 2.0 110 km ESE of Yakutat, Alaska
  8. 1.9 111 km NW of Elfin Cove, Alaska
  9. 1.8 106 km WSW of Covenant Life, Alaska
  10. 1.5 119 km ESE of Yakutat, Alaska
  11. 1.9 111 km ESE of Yakutat, Alaska
  12. 2.8 90 km ESE of Yakutat, Alaska
  13. 1.7 89 km WSW of Mosquito Lake, Alaska
  14. 1.6 116 km NW of Elfin Cove, Alaska
  15. 1.8 Southeastern 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 2021-02-08 — it released about 1,400 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.