QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

55 km SSW of Lowell Point, Alaska

· 30 km deep · released about 43 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 2.1 (ml)
Depth
30 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2301 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 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 59.5863, -149.6752. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 1.7 23 km SE of Lowell Point, Alaska
  2. 1.6 39 km S of Lowell Point, Alaska
  3. 2.7 12 km SSE of Lowell Point, Alaska
  4. 1.6 9 km SSE of Lowell Point, Alaska
  5. 2.0 38 km SSW of Lowell Point, Alaska
  6. 1.6 65 km ESE of Halibut Cove, Alaska
  7. 2.4 96 km S of Lowell Point, Alaska
  8. 1.5 52 km ESE of Fox River, Alaska
  9. 2.4 46 km SSW of Lowell Point, Alaska
  10. 1.9 17 km SSW of Lowell Point, Alaska
  11. 1.6 18 km SSW of Lowell Point, Alaska
  12. 1.8 60 km SSE of Lowell Point, Alaska
  13. 2.0 64 km S of Lowell Point, Alaska
  14. 3.0 98 km S of Lowell Point, Alaska
  15. 1.7 19 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.

On USGS

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