QuakeIndex

Earthquake · automatic estimate, may change

M 2.3ml

76 km NNE of Petersville, Alaska

· 119 km deep · released about 85 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Denali Borough 61 kmMatanuska-Susitna Borough 110 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 2.3 (ml)
Depth
119 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Denali Borough, 61 km NNE
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 1891 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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 63.1637, -150.3991. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Denali Borough, AK 61 km (38 mi) SSW of here earthquakes near Denali Borough
Matanuska-Susitna Borough, AK 110 km (68 mi) NNW 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

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

  1. 1.5 69 km ESE of Denali National Park, Alaska
  2. 1.7 64 km NNE of Petersville, Alaska
  3. 1.8 68 km NNE of Petersville, Alaska
  4. 1.5 38 km N of Petersville, Alaska
  5. 1.8 65 km ESE of Denali National Park, Alaska
  6. 1.5 50 km E of Denali National Park, Alaska
  7. 1.5 69 km ESE of Denali National Park, Alaska
  8. 1.7 49 km WSW of Cantwell, Alaska
  9. 2.6 Central Alaska
  10. 2.0 69 km ESE of Denali National Park, Alaska
  11. 1.8 59 km SE of Denali National Park, Alaska
  12. 1.6 69 km SE of Denali National Park, Alaska
  13. 1.8 44 km E of Denali National Park, Alaska
  14. 2.3 53 km N of Petersville, Alaska
  15. 1.8 71 km ESE of Denali National Park, 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 5.3 on 2016-05-15 — it released about 32,000 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.