QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

Earthquake near Fishhook, AK

No earthquake was likely felt in Fishhook in the 24 hours to 3:08 am AKST (12:08 UTC). The last one was M 4.4, 118 km (73 mi) E, at 11:11 am AKDT on 30 October 2026, estimated intensity II (weak) in town; 54 felt reports to USGS. Every earthquake near Fishhook

This page: a magnitude 2.5 earthquake was recorded 35 km (22 mi) north of Fishhook, AK, at 5:22 am AKST on 21 November 2018 (14:22 UTC), 29 km deep. 2 people have reported feeling it to USGS.

USGS: 32 km ESE of Susitna North, Alaska

99 km (62 mi) NNE of Anchorage, AK

5:22 am AKST, Nov 21, 2018 · · 29 km deep · released about 170 lb of TNT

Every earthquake near Fishhook Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Matanuska-Susitna Borough 26 kmAnchorage Municipality 98 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
5:22 am AKST on 21 November 2018 ()
Where
35 km (22 mi) north of Fishhook, AK · earthquakes near Fishhook
Magnitude
M 2.5 (ml)
Depth
29 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Matanuska-Susitna Borough, 26 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1184 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 it was probably too small to be felt, even directly above it. In Fishhook, 35 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 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 63,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.6× the energy of this one
  4. This earthquake M 2.5 about 170 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 4.3 on 2017-08-21 — about 500 times the energy of this one.

Before 2016, the USGS record lists 7 earthquakes of M5 or more within 50 km; the five largest:

  1. 5.9 23 km NE of Willow, Alaska · 29 km SW of this epicentre
  2. 5.8 37 km ENE of Susitna North, Alaska · 27 km N of this epicentre
  3. 5.8 14 km NNE of Fishhook, Alaska · 24 km SSE of this epicentre
  4. 5.4 25 km NNW of Willow, Alaska · 46 km WSW of this epicentre
  5. 5.1 21 km SSE of Susitna North, Alaska · 23 km WSW 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 62.0587, -149.2763. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Matanuska-Susitna Borough, AK 26 km (16 mi) NNW earthquakes near Matanuska-Susitna Borough
Anchorage Municipality, AK 98 km (61 mi) S earthquakes near Anchorage Municipality

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

Aftershocks so far

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

  1. 1.9 18 km ENE of Willow, Alaska
  2. 1.7 17 km N of Fishhook, Alaska
  3. 2.0 6 km NE of Meadow Lakes, Alaska
  4. 3.6 23 km NNE of Willow, Alaska
  5. 1.7 11 km NNE of Houston, Alaska
  6. 1.8 32 km N of Fishhook, Alaska
  7. 2.3 14 km N of Meadow Lakes, Alaska
  8. 1.6 10 km NNE of Meadow Lakes, Alaska
  9. 1.8 25 km ESE of Susitna North, Alaska
  10. 1.5 21 km ESE of Susitna North, Alaska
  11. 1.6 Southern Alaska
  12. 1.8 23 km WNW of Fishhook, Alaska
  13. 1.5 23 km ESE of Susitna North, Alaska
  14. 1.8 6 km NW of Meadow Lakes, Alaska
  15. 1.6 17 km NNW of Sutton-Alpine, 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.