QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

16 km NE of Willow, Alaska

· 58 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Matanuska-Susitna Borough 48 kmAnchorage Municipality 81 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
58 km below the surface
Felt
no reports yet
Nearest
Matanuska-Susitna Borough, 48 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1715 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 61.8588, -149.8278. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Matanuska-Susitna Borough, AK 48 km (30 mi) SSW of here earthquakes near Matanuska-Susitna Borough
Anchorage Municipality, AK 81 km (51 mi) NNW of here earthquakes near Anchorage Municipality

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 5 km NW of Meadow Lakes, Alaska
  2. 1.8 27 km E of Susitna North, Alaska
  3. 1.6 26 km ENE of Susitna North, Alaska
  4. 2.9 26 km SSE of Susitna North, Alaska
  5. 2.1 20 km S of Susitna North, Alaska
  6. 1.7 5 km WNW of Meadow Lakes, Alaska
  7. 1.8 10 km WSW of Willow, Alaska
  8. 1.5 1 km SE of Houston, Alaska
  9. 1.6 17 km NNE of Susitna, Alaska
  10. 2.4 7 km WNW of Big Lake, Alaska
  11. 1.6 19 km N of Willow, Alaska
  12. 1.6 19 km ENE of Willow, Alaska
  13. 1.7 2 km NE of Big Lake, Alaska
  14. 1.6 1 km NNE of Big Lake, Alaska
  15. 1.6 1 km ENE of Big Lake, 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 5.2 on 2018-11-30 — it released about 350,000 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.