QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

37 km W of Anderson, Alaska

· 19 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Denali Borough 70 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 2.5 (ml)
Depth
19 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Denali Borough, 70 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1137 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 64.3098, -149.9513. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Denali Borough, AK 70 km (43 mi) N of here earthquakes near Denali Borough
Yukon-Koyukuk Census Area, AK 141 km (88 mi) SSE of here earthquakes near Yukon-Koyukuk Census Area

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

Aftershocks so far

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

  1. 1.7 38 km WSW of Clear, Alaska, Alaska
  2. 2.9 39 km W of Clear, Alaska, Alaska
  3. 1.7 37 km WSW of Clear, Alaska, Alaska
  4. 1.8 46 km W of Four Mile Road, Alaska
  5. 1.5 Central Alaska
  6. 1.9 31 km W of Four Mile Road, Alaska
  7. 1.9 29 km WNW of Four Mile Road, Alaska
  8. 1.5 30 km WNW of Four Mile Road, Alaska
  9. 1.6 27 km W of Four Mile Road, Alaska
  10. 1.6 28 km WNW of Four Mile Road, Alaska
  11. 3.5 30 km WNW of Four Mile Road, Alaska
  12. 1.9 14 km W of Four Mile Road, Alaska
  13. 1.7 29 km WNW of Four Mile Road, Alaska
  14. 1.5 40 km WSW of Clear, Alaska, Alaska
  15. 1.9 39 km W of Clear, Alaska, 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 4.3 on 2016-12-08 — it released about 500 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.