QuakeIndex

Earthquake · automatic estimate, may change

M 1.7ml

Earthquake near Tok, AK

No earthquake was likely felt in Tok in the 24 hours to 6:12 pm AKST (03:12 UTC). The last one was M 7.0, 382 km (237 mi) SSE, at 11:41 am AKST on 6 December 2025, estimated intensity III (weak) in town; 1,058 felt reports to USGS. Every earthquake near Tok

This page: a magnitude 1.7 earthquake was recorded 23 km (14 mi) southeast of Tok, AK, at 5:57 pm AKDT on 12 September 2025 (01:57 UTC), less than 1 km deep. The magnitude and location are an automatic first estimate and may change.

USGS: 9 km NW of Tetlin, Alaska

5:57 pm AKDT, Sep 12, 2025 · · 0.1 km deep · released about 11 lb of TNT

Every earthquake near Tok Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Southeast Fairbanks Census Area 79 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
5:57 pm AKDT on 12 September 2025 ()
Where
23 km (14 mi) southeast of Tok, AK · earthquakes near Tok
Magnitude
M 1.7 (ml)
Depth
0.1 km below the surface
Felt
no reports yet
Nearest
Southeast Fairbanks Census Area, 79 km NNW
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 427 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 12 km (7 mi) from the epicentre. In Tok, 23 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 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 63.1992, -142.6476. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Southeast Fairbanks Census Area, AK 79 km (49 mi) NNW earthquakes near Southeast Fairbanks Census Area

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

Aftershocks so far

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

  1. 1.8 16 km SSE of Tok, Alaska
  2. 1.7 20 km W of Tetlin, Alaska
  3. 1.3 17 km SSE of Tok, Alaska
  4. 1.5 31 km SW of Tetlin, Alaska
  5. 1.4 20 km S of Tok, Alaska
  6. 1.5 19 km S of Tok, Alaska
  7. 1.5 19 km W of Tetlin, Alaska
  8. 2.0 29 km SW of Tetlin, Alaska
  9. 2.1 29 km SW of Tetlin, Alaska
  10. 1.8 19 km W of Tetlin, Alaska
  11. 1.6 10 km NW of Tetlin, Alaska
  12. 1.9 12 km NW of Tetlin, Alaska
  13. 1.9 13 km NW of Tetlin, 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.