QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Earthquake near Seward, AK

No earthquake was likely felt in Seward in the 24 hours to 9:28 am AKST (18:28 UTC). The last one was M 4.3, 83 km (52 mi) W, at 2:30 am AKST on 1 November 2026, estimated intensity II (weak) in town; 115 felt reports to USGS. Every earthquake near Seward

This page: a magnitude 1.7 earthquake was recorded 14 km (9 mi) west of Seward, AK, at 10:33 am AKST on 23 December 2025 (19:33 UTC), 35 km deep.

USGS: 14 km W of Lowell Point, Alaska

10:33 am AKST, Dec 23, 2025 · · 35 km deep · released about 11 lb of TNT

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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
10:33 am AKST on 23 December 2025 ()
Where
14 km (9 mi) west of Seward, AK · earthquakes near Seward
Magnitude
M 1.7 (ml)
Depth
35 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 258 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 Seward, 14 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.

Earthquakes near other towns within 30 km: Bear Creek.

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 lists 6 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.6 3 km SW of Bear Creek, Alaska · 16 km ENE of this epicentre
  2. 6.3 37 km SSE of Lowell Point, Alaska · 45 km SE of this epicentre
  3. 5.9 33 km SSE of Lowell Point, Alaska · 43 km SE of this epicentre
  4. 5.8 33 km ESE of Bear Creek, Alaska · 50 km E of this epicentre
  5. 5.4 12 km ESE of Lowell Point, Alaska · 26 km ESE 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 60.0830, -149.6940. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 1.8 21 km WNW of Bear Creek, Alaska
  2. 2.4 29 km W of Lowell Point, Alaska
  3. 2.4 21 km SE of Lowell Point, Alaska
  4. 2.3 12 km SE of Lowell Point, Alaska
  5. 2.1 24 km W of Lowell Point, Alaska
  6. 1.7 15 km SSE of Lowell Point, Alaska
  7. 2.0 16 km E of Lowell Point, Alaska
  8. 1.8 20 km SE of Lowell Point, Alaska
  9. 1.9 27 km SSE of Lowell Point, Alaska
  10. 1.8 3 km NNE of Cooper Landing, Alaska
  11. 2.1 3 km SE of Primrose, Alaska
  12. 1.4 4 km E of Cooper Landing, Alaska
  13. 1.5 42 km WSW of Lowell Point, Alaska
  14. 1.7 14 km NW of Bear Creek, Alaska
  15. 2.0 33 km WNW of Seward, 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.