QuakeIndex

ice quake · reviewed by a seismologist

M 1.7ml

19 km SSW of Lowell Point, Alaska

· 0.0 km deep · released about 11 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 1.7 (ml)
Depth
0.0 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1648 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

USGS catalogues this as ice quake, not an earthquake.

How big was it?

This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 59.9048, -149.5654. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.6 33 km SSW of Cooper Landing, Alaska
  2. 1.5 28 km SE of Lowell Point, Alaska
  3. 1.7 22 km S of Lowell Point, Alaska
  4. 1.6 25 km S of Cooper Landing, Alaska
  5. 1.9 25 km SSW of Cooper Landing, Alaska
  6. 2.0 17 km ESE of Lowell Point, Alaska
  7. 2.3 58 km S of Lowell Point, Alaska
  8. 1.6 36 km WSW of Lowell Point, Alaska
  9. 1.7 21 km ESE of Lowell Point, Alaska
  10. 1.9 21 km SE of Lowell Point, Alaska
  11. 1.7 1 km WSW of Primrose, Alaska
  12. 1.7 26 km WNW of Bear Creek, Alaska
  13. 1.8 45 km SW of Lowell Point, Alaska
  14. 1.6 57 km SSW of Lowell Point, Alaska
  15. 1.8 20 km WSW of Primrose, 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.