QuakeIndex

Earthquake · automatic estimate, may change

M 1.7ml

Earthquake near Susitna North, AK

No earthquake was likely felt in Susitna North in the 24 hours to 11:31 am AKST (20:31 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 1.7 earthquake was recorded 49 km (30 mi) west-southwest of Susitna North, AK, at 6:36 pm AKDT on 13 October 2025 (02:36 UTC), 53 km deep. The magnitude and location are an automatic first estimate and may change.

USGS: 34 km E of Skwentna, Alaska

6:36 pm AKDT, Oct 13, 2025 · · 53 km deep · released about 11 lb of TNT

Every earthquake near Susitna North Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Matanuska-Susitna Borough 70 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
6:36 pm AKDT on 13 October 2025 ()
Where
49 km (30 mi) west-southwest of Susitna North, AK · earthquakes near Susitna North
Magnitude
M 1.7 (ml)
Depth
53 km below the surface
Felt
no reports yet
Nearest
Matanuska-Susitna Borough, 70 km ENE
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 396 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Susitna North, 49 km away, the estimate is intensity I (not felt). 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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.

For this area

The largest earthquake within 50 km since 2016 was M 5.2 on 2019-09-17 — about 180,000 times the energy of this one.

Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.9 27 km SE of Skwentna, Alaska · 30 km SSW of this epicentre
  2. 5.7 19 km E of Skwentna, Alaska · 16 km WSW of this epicentre
  3. 5.4 25 km NNW of Willow, Alaska · 34 km ESE of this epicentre
  4. 5.4 29 km WNW of Susitna, Alaska · 42 km SSW of this epicentre
  5. 5.4 33 km ESE of Skwentna, Alaska · 23 km S 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 62.0477, -150.7586. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Matanuska-Susitna Borough, AK 70 km (43 mi) ENE earthquakes near Matanuska-Susitna Borough
Anchorage Municipality, AK 125 km (77 mi) SE earthquakes near Anchorage Municipality

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 26 km WSW of Susitna North, Alaska
  2. 2.1 13 km NW of Willow, Alaska
  3. 2.0 30 km E of Skwentna, Alaska
  4. 1.8 34 km SE of Skwentna, Alaska
  5. 2.0 18 km W of Willow, Alaska
  6. 2.1 26 km WSW of Petersville, Alaska
  7. 2.0 19 km NW of Willow, Alaska
  8. 2.2 29 km ENE of Skwentna, Alaska
  9. 2.3 28 km NW of Susitna, Alaska
  10. 2.4 25 km SSW of Petersville, Alaska
  11. 3.6 29 km SSW of Petersville, Alaska
  12. 2.2 14 km W of Trapper Creek, Alaska
  13. 1.8 28 km NNW of Susitna, Alaska
  14. 2.2 23 km WSW of Trapper Creek, Alaska
  15. 2.2 28 km NNE of Skwentna, 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.