QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

50 km NNW of Eureka Roadhouse, Alaska

· 37 km deep · released about 5.4 lb of TNT

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10 km30 km60 km120 km N Matanuska-Susitna Borough 97 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 1.5 (ml)
Depth
37 km below the surface
Felt
no reports yet
Nearest
Matanuska-Susitna Borough, 97 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 988 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 62.3333, -147.6244. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Matanuska-Susitna Borough, AK 97 km (61 mi) E 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

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

  1. 1.9 25 km NW of Glacier View, Alaska
  2. 2.1 55 km NNE of Chickaloon, Alaska
  3. 1.6 72 km NW of Eureka Roadhouse, Alaska
  4. 1.9 54 km NNE of Chickaloon, Alaska
  5. 1.6 31 km NW of Eureka Roadhouse, Alaska
  6. 1.6 53 km NW of Eureka Roadhouse, Alaska
  7. 1.6 30 km NW of Eureka Roadhouse, Alaska
  8. 1.6 19 km WNW of Eureka Roadhouse, Alaska
  9. 2.2 57 km NW of Eureka Roadhouse, Alaska
  10. 2.5 10 km WNW of Eureka Roadhouse, Alaska
  11. 1.8 50 km NNW of Eureka Roadhouse, Alaska
  12. 1.7 27 km NNW of Glacier View, Alaska
  13. 2.4 23 km NW of Eureka Roadhouse, Alaska
  14. 1.7 27 km NW of Glacier View, Alaska
  15. 1.6 20 km N of Glacier View, 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 4.1 on 2018-01-26 — it released about 7,900 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.