QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4ml

Earthquake near Anchorage, AK

No earthquake was likely felt in Anchorage in the 24 hours to 9:24 am AKST (18:24 UTC). The last one was M 3.5, 39 km (24 mi) SSW, at 4:48 pm AKDT on 27 October 2026, estimated intensity II (weak) in town; 98 felt reports to USGS. Every earthquake near Anchorage

This page: a magnitude 3.4 earthquake was recorded 47 km (29 mi) west-northwest of Anchorage, AK, at 6:49 pm AKST on 29 January 2024 (03:49 UTC), 57 km deep. 86 people have reported feeling it to USGS.

USGS: 18 km SSW of Susitna, Alaska

47 km (29 mi) WNW of Anchorage, AK

6:49 pm AKST, Jan 29, 2024 · · 57 km deep · released about 1.9 tons of TNT

Every earthquake near Anchorage Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Anchorage Municipality 79 kmMatanuska-Susitna Borough 114 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
6:49 pm AKST on 29 January 2024 ()
Where
47 km (29 mi) west-northwest of Anchorage, AK · earthquakes near Anchorage
Magnitude
M 3.4 (ml)
Depth
57 km below the surface
Felt
86 reports · strongest reported intensity V
Measured shaking
intensity III (ShakeMap)
Nearest
Anchorage Municipality, 79 km ESE
Nearest mapped fault
Castle Mountain fault, 1 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 619 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 6 km (4 mi) from the epicentre. In Anchorage, 47 km away, the estimate is intensity II (weak). 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 1.9 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 89,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,800× the energy of this one
  4. This earthquake M 3.4 about 1.9 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 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.

For this area

The largest earthquake within 50 km since 2016 was M 5.2 on 2019-09-17 — about 500 times the energy of this one.

Before 2016, the USGS record lists 24 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.9 27 km SE of Skwentna, Alaska · 49 km NNW of this epicentre
  2. 6.8 Southern Alaska · 41 km SSW of this epicentre
  3. 6.8 4 km NE of Beluga, Alaska · 31 km SW of this epicentre
  4. 5.8 17 km NW of Beluga, Alaska · 40 km WSW of this epicentre
  5. 5.8 27 km N of Beluga, Alaska · 18 km W 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 61.4042, -150.6873. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Anchorage Municipality, AK 79 km (49 mi) ESE earthquakes near Anchorage Municipality
Matanuska-Susitna Borough, AK 114 km (71 mi) NNE earthquakes near Matanuska-Susitna Borough
Kenai Peninsula Borough, AK 145 km (90 mi) SW earthquakes near Kenai Peninsula Borough

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

Aftershocks so far

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

  1. 1.7 29 km NW of Susitna, Alaska
  2. 1.7 14 km W of Anchorage, Alaska
  3. 1.6 13 km NW of Point Possession, Alaska
  4. 1.5 8 km N of Point Possession, Alaska
  5. 1.6 27 km ENE of Beluga, Alaska
  6. 1.5 8 km SSE of Susitna, Alaska
  7. 1.6 11 km NW of Beluga, Alaska
  8. 1.5 9 km NW of Point Possession, Alaska
  9. 1.7 26 km WSW of Point MacKenzie, Alaska
  10. 1.5 21 km S of Susitna, Alaska
  11. 1.7 24 km ENE of Beluga, Alaska
  12. 1.7 16 km NNE of Susitna, Alaska
  13. 1.6 20 km NNW of Susitna, Alaska
  14. 1.5 5 km ESE of Tyonek, Alaska
  15. 1.7 10 km ENE of Beluga, 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.