QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

19 km NNE of Point Possession, Alaska

· 58 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Anchorage Municipality 68 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
58 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Anchorage Municipality, 68 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1153 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 61.0770, -150.5287. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Anchorage Municipality, AK 68 km (42 mi) W of here earthquakes near Anchorage Municipality
Kenai Peninsula Borough, AK 125 km (78 mi) NE of here earthquakes near Kenai Peninsula Borough

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

Aftershocks so far

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

  1. 3.4 23 km SW of Anchorage, Alaska
  2. 2.1 7 km W of Point Possession, Alaska
  3. 3.4 25 km SW of Anchorage, Alaska
  4. 1.5 22 km N of Point Possession, Alaska
  5. 2.0 22 km ESE of Point Possession, Alaska
  6. 2.3 22 km E of Point Possession, Alaska
  7. 1.7 28 km ESE of Point Possession, Alaska
  8. 1.5 12 km SW of Point MacKenzie, Alaska
  9. 1.8 18 km N of Point Possession, Alaska
  10. 1.6 12 km ENE of Beluga, Alaska
  11. 2.3 9 km ESE of Beluga, Alaska
  12. 1.6 11 km SW of Big Lake, Alaska
  13. 2.3 15 km NNW of Point Possession, Alaska
  14. 1.6 9 km NW of Point MacKenzie, Alaska
  15. 2.0 25 km NNW of Cooper Landing, 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 4.2 on 2016-02-15 — it released about 350 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.