QuakeIndex

Earthquake · reviewed by a seismologist

M 4.1mwr

Earthquake near Susitna North, AK

No earthquake was likely felt in Susitna North in the 24 hours to 3:51 am AKST (12:51 UTC). The last one was M 3.6, 19 km (12 mi) E, at 9:16 am AKDT on 27 October 2026, estimated intensity II (weak) in town; 17 felt reports to USGS. Every earthquake near Susitna North

This page: a magnitude 4.1 earthquake was recorded 44 km (28 mi) east-northeast of Susitna North, AK, at 3:16 am AKDT on 15 May 2024 (11:16 UTC), 1.3 km deep.

USGS: 44 km ENE of Susitna North, Alaska

3:16 am AKDT, May 15, 2024 · · 1.3 km deep · released about 21 tons of TNT

Every earthquake near Susitna North Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Matanuska-Susitna Borough 23 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
3:16 am AKDT on 15 May 2024 ()
Where
44 km (28 mi) east-northeast of Susitna North, AK · earthquakes near Susitna North
Magnitude
M 4.1 (mwr)
Depth
1.3 km below the surface
Felt
no reports yet
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Nearest
Matanuska-Susitna Borough, 23 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 765 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 104 km (65 mi) from the epicentre. In Susitna North, 44 km away, the estimate is intensity III (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.

Likely felt in: Susitna North 44 km, intensity III. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 21 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 7,900× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 350× the energy of this one
  3. Magna, Utah 2020 M 5.7 250× the energy of this one
  4. This earthquake M 4.1 about 21 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 45× 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 2022-02-06 — about 45 times the energy of this one.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

  1. 5.8 37 km ENE of Susitna North, Alaska · 9 km SSW of this epicentre
  2. 5.1 25 km ENE of Susitna North, Alaska · 20 km SW of this epicentre
  3. 5.0 70 km ENE of Chase, Alaska · 39 km NNE 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 62.3749, -149.1261. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Matanuska-Susitna Borough, AK 23 km (14 mi) WSW earthquakes near Matanuska-Susitna Borough

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

Aftershocks so far

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

  1. 1.5 28 km NE of Susitna North, Alaska
  2. 2.2 44 km NE of Chase, Alaska
  3. 1.7 9 km E of Susitna North, Alaska
  4. 1.5 44 km N of Chickaloon, Alaska
  5. 1.8 17 km ESE of Susitna North, Alaska
  6. 2.1 65 km ENE of Chase, Alaska
  7. 1.5 35 km NE of Chase, Alaska
  8. 2.3 52 km ENE of Chase, Alaska
  9. 1.6 59 km ENE of Chase, Alaska
  10. 2.3 65 km S of Cantwell, Alaska
  11. 1.5 41 km ENE of Susitna North, Alaska
  12. 2.0 47 km NE of Chase, Alaska
  13. 1.9 73 km SSE of Cantwell, Alaska
  14. 1.7 44 km ENE of Susitna North, Alaska
  15. 1.6 42 km ENE of Susitna North, 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.