QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

1 km S of Eureka Roadhouse, Alaska

· 34 km deep · released about 120 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 2.4 (ml)
Depth
34 km below the surface
Felt
no reports yet
Nearest
Anchorage Municipality, 140 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1336 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 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.9× the energy of this one
  4. This earthquake M 2.4 about 120 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 61.9230, -147.1661. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Anchorage Municipality, AK 140 km (87 mi) NE of here earthquakes near Anchorage Municipality

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

Aftershocks so far

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

  1. 1.7 47 km S of Nelchina, Alaska
  2. 2.2 33 km SE of Eureka Roadhouse, Alaska
  3. 1.6 30 km NW of Eureka Roadhouse, Alaska
  4. 1.5 7 km NNE of Eureka Roadhouse, Alaska
  5. 2.0 21 km NW of Eureka Roadhouse, Alaska
  6. 1.6 5 km WSW of Eureka Roadhouse, Alaska
  7. 2.1 31 km NW of Eureka Roadhouse, Alaska
  8. 1.5 Southern Alaska
  9. 1.9 10 km W of Eureka Roadhouse, Alaska
  10. 1.8 23 km SE of Eureka Roadhouse, Alaska
  11. 2.3 2 km SSE of Eureka Roadhouse, Alaska
  12. 2.7 32 km SSE of Nelchina, Alaska
  13. 1.5 28 km NW of Eureka Roadhouse, Alaska
  14. 2.1 37 km SSE of Eureka Roadhouse, Alaska
  15. 1.9 8 km NNE 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.8 on 2022-10-06 — it released about 4,000 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.