QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5ml

44 km SSW of Cantwell, Alaska

· 82 km deep · released about 2.7 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Denali Borough 80 kmMatanuska-Susitna Borough 86 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 3.5 (ml)
Depth
82 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Denali Borough, 80 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 10 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 2.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 63,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,000× the energy of this one
  4. This earthquake M 3.5 about 2.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.6× more

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 63.0310, -149.3280. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Denali Borough, AK 80 km (50 mi) SSE of here earthquakes near Denali Borough
Matanuska-Susitna Borough, AK 86 km (53 mi) N 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

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

  1. 2.1 44 km NE of Chase, Alaska
  2. 2.1 58 km ENE of Chase, Alaska
  3. 2.5 22 km WSW of Cantwell, Alaska
  4. 2.1 55 km WSW of Cantwell, Alaska
  5. 1.6 29 km NE of Chase, Alaska
  6. 1.8 31 km S of Cantwell, Alaska
  7. 2.3 50 km SSW of Cantwell, Alaska
  8. 2.1 32 km W of Cantwell, Alaska
  9. 1.8 53 km NNE of Chase, Alaska
  10. 1.7 44 km ENE of Chase, Alaska
  11. 2.0 44 km SSW of Cantwell, Alaska
  12. 1.9 46 km SSW of Cantwell, Alaska
  13. 1.5 35 km W of Cantwell, Alaska
  14. 3.9 62 km S of Cantwell, Alaska
  15. 2.2 51 km ENE of Chase, 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 4.6 on 2016-04-26 — it released about 45 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.