QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

5 km ESE of Point Possession, Alaska

· 62 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Anchorage Municipality 76 kmKenai Peninsula Borough 112 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 3.1 (ml)
Depth
62 km below the surface
Felt
1 report · strongest reported intensity II
Measured shaking
intensity II (ShakeMap)
Nearest
Anchorage Municipality, 76 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1511 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 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 60.9120, -150.5890. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Anchorage Municipality, AK 76 km (47 mi) WSW of here earthquakes near Anchorage Municipality
Kenai Peninsula Borough, AK 112 km (70 mi) ENE 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

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

  1. 1.8 Southern Alaska
  2. 1.7 12 km SSE of Point Possession, Alaska
  3. 1.5 23 km ENE of Sterling, Alaska
  4. 1.5 20 km WSW of Point MacKenzie, Alaska
  5. 1.8 22 km SSW of Susitna, Alaska
  6. 1.7 18 km NE of Nikiski, Alaska
  7. 1.9 25 km SSW of Susitna, Alaska
  8. 1.9 Southern Alaska
  9. 2.4 31 km ENE of Sterling, Alaska
  10. 2.2 22 km NNE of Beluga, Alaska
  11. 1.7 6 km S of Point Possession, Alaska
  12. 2.1 21 km WSW of Anchorage, Alaska
  13. 2.4 17 km W of Point Possession, Alaska
  14. 1.5 21 km E of Point Possession, Alaska
  15. 1.5 Kenai Peninsula, 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 4.5 on 2018-10-15 — it released about 130 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.