QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

21 km SSE of Glacier View, Alaska

· 20 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Anchorage Municipality 109 km
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
20 km below the surface
Felt
no reports yet
Nearest
Anchorage Municipality, 109 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1150 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 61.6329, -147.4686. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Anchorage Municipality, AK 109 km (68 mi) ENE of here earthquakes near Anchorage Municipality
Matanuska-Susitna Borough, AK 128 km (79 mi) ESE of here earthquakes near Matanuska-Susitna Borough

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.3 41 km SSE of Glacier View, Alaska
  2. 2.0 57 km S of Glacier View, Alaska
  3. 1.5 53 km WNW of Valdez, Alaska
  4. 1.5 48 km NW of Valdez, Alaska
  5. 2.2 51 km S of Glacier View, Alaska
  6. 1.9 33 km SE of Glacier View, Alaska
  7. 1.7 27 km SSW of Glacier View, Alaska
  8. 1.5 64 km S of Glacier View, Alaska
  9. 1.5 61 km NW of Tatitlek, Alaska
  10. 1.6 63 km S of Glacier View, Alaska
  11. 2.1 38 km WNW of Valdez, Alaska
  12. 1.9 15 km SSE of Glacier View, Alaska
  13. 1.8 17 km W of Eureka Roadhouse, Alaska
  14. 4.1 15 km WNW of Glacier View, Alaska
  15. 1.7 24 km SSE of Eureka Roadhouse, 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.