QuakeIndex

Earthquake · reviewed by a seismologist

M 4.4mwr

33 km W of Akhiok, Alaska

Yes. A magnitude 4.4 earthquake was recorded 33 km W of Akhiok, Alaska at 07:57 UTC on 2024-10-12, less than 1 km deep. 111 people have reported feeling it to USGS.

· 0.9 km deep · released about 60 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kodiak Island Borough 93 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 4.4 (mwr)
Depth
0.9 km below the surface
Felt
111 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Kodiak Island Borough, 93 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 690 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

At this magnitude and depth, people at rest would likely notice it out to about 130 km (81 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 60 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 2,800× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 130× the energy of this one
  3. Magna, Utah 2020 M 5.7 89× the energy of this one
  4. This earthquake M 4.4 about 60 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 130× 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.

For this area

The largest earthquake within 50 km since 2016 was M 5.3 on 2021-02-13 — about 22 times the energy of this one.

Before 2016, the USGS record lists 18 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.0 26 km SSE of Karluk, Alaska · 46 km NNE of this epicentre
  2. 6.4 29 km N of Akhiok, Alaska · 37 km NE of this epicentre
  3. 6.1 13 km S of Akhiok, Alaska · 38 km ESE of this epicentre
  4. 6.0 28 km N of Akhiok, Alaska · 37 km NE of this epicentre
  5. 5.9 14 km NNE of Akhiok, Alaska · 38 km ENE of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 56.9819, -154.7131. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kodiak Island Borough, AK 93 km (58 mi) NNE earthquakes near Kodiak Island 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. 1.6 30 km WNW of Akhiok, Alaska
  2. 1.9 38 km WSW of Akhiok, Alaska
  3. 2.5 21 km S of Karluk, Alaska
  4. 2.2 46 km SW of Akhiok, Alaska
  5. 2.1 45 km WSW of Akhiok, Alaska
  6. 2.6 29 km SSE of Karluk, Alaska
  7. 1.5 46 km SW of Karluk, Alaska
  8. 1.5 57 km WNW of Akhiok, Alaska
  9. 2.9 24 km WNW of Akhiok, Alaska
  10. 2.0 12 km W of Akhiok, Alaska
  11. 1.8 17 km W of Akhiok, Alaska
  12. 1.8 15 km WNW of Akhiok, Alaska
  13. 1.9 45 km W of Akhiok, Alaska
  14. 2.0 24 km SSW of Karluk, Alaska
  15. 1.6 62 km W of Akhiok, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.