QuakeIndex

Earthquake · automatic estimate, may change

M 2.5ml

Earthquake near Fishhook, AK

No earthquake was likely felt in Fishhook in the 24 hours to 4:01 am AKST (13:01 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 9 km (5 mi) northwest of Fishhook, AK, at 1:13 am AKDT on 10 June 2021 (09:13 UTC), 19 km deep. The magnitude and location are an automatic first estimate and may change.

USGS: 8 km NW of Fishhook, Alaska

72 km (45 mi) NNE of Anchorage, AK

1:13 am AKDT, Jun 10, 2021 · · 19 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 52 kmAnchorage Municipality 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
1:13 am AKDT on 10 June 2021 ()
Where
9 km (5 mi) northwest of Fishhook, AK · earthquakes near Fishhook
Magnitude
M 2.5 (ml)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Matanuska-Susitna Borough, 52 km N
Nearest mapped fault
Castle Mountain fault, 11 km from its surface trace — near is not the same as on
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 1907 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, people at rest would likely notice it out to about 11 km (7 mi) from the epicentre. In Fishhook, 9 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.

Likely felt in: Fishhook 9 km, intensity II. Estimated for each town centre; each link is that town's own record.

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

  1. 5.9 23 km NE of Willow, Alaska · 24 km WNW of this epicentre
  2. 5.8 14 km NNE of Fishhook, Alaska · 14 km ENE of this epicentre
  3. 5.6 11 km NW of Big Lake, Alaska · 48 km WSW of this epicentre
  4. 5.4 25 km NNW of Willow, Alaska · 46 km WNW of this epicentre
  5. 5.3 3 km NNE of Houston, Alaska · 28 km SW 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 61.8063, -149.3405. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Matanuska-Susitna Borough, AK 52 km (32 mi) N earthquakes near Matanuska-Susitna Borough
Anchorage Municipality, AK 70 km (44 mi) S earthquakes near Anchorage Municipality

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

Aftershocks so far

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

  1. 2.9 11 km SSE of Susitna North, Alaska
  2. 1.5 25 km SE of Susitna North, Alaska
  3. 1.5 8 km ESE of Willow, Alaska
  4. 1.6 37 km NNW of Sutton-Alpine, Alaska
  5. 2.4 18 km S of Susitna North, Alaska
  6. 2.2 12 km N of Houston, Alaska
  7. 1.6 22 km N of Fishhook, Alaska
  8. 1.6 9 km ENE of Willow, Alaska
  9. 2.5 27 km SSE of Susitna North, Alaska
  10. 2.0 26 km N of Fishhook, Alaska
  11. 1.9 9 km N of Meadow Lakes, Alaska
  12. 1.9 7 km SE of Houston, Alaska
  13. 1.8 7 km SE of Susitna North, Alaska
  14. 2.0 15 km N of Fishhook, Alaska
  15. 1.6 4 km S of Houston, 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.