QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

Earthquake near Knik-Fairview, AK

No earthquake was likely felt in Knik-Fairview in the 24 hours to 12:06 am AKST (09:06 UTC). The last one was M 2.1, 7 km (4 mi) NW, at 8:17 am AKST on 11 November 2026, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near Knik-Fairview

This page: a magnitude 2.9 earthquake was recorded 47 km (30 mi) west of Knik-Fairview, AK, at 3:05 pm AKDT on 14 April 2022 (23:05 UTC), 53 km deep. 6 people have reported feeling it to USGS.

USGS: 5 km NNE of Susitna, Alaska

51 km (32 mi) NW of Anchorage, AK

3:05 pm AKDT, Apr 14, 2022 · · 53 km deep · released about 680 lb of TNT

Every earthquake near Knik-Fairview Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Anchorage Municipality 79 kmMatanuska-Susitna Borough 91 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
3:05 pm AKDT on 14 April 2022 ()
Where
47 km (30 mi) west of Knik-Fairview, AK · earthquakes near Knik-Fairview
Magnitude
M 2.9 (ml)
Depth
53 km below the surface
Felt
6 reports · strongest reported intensity III
Measured shaking
intensity II (ShakeMap)
Nearest
Anchorage Municipality, 79 km SE
Nearest mapped fault
Castle Mountain fault, 11 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1606 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 Knik-Fairview, 47 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.

Earthquakes near other towns within 30 km: Big Lake, Willow.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 7.1 on 2018-11-30 — about 2,000,000 times the energy of this one.

Before 2016, the USGS record lists 25 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.9 27 km SE of Skwentna, Alaska · 38 km NW of this epicentre
  2. 5.8 27 km N of Beluga, Alaska · 36 km SW of this epicentre
  3. 5.8 20 km ENE of Beluga, Alaska · 41 km SSW of this epicentre
  4. 5.6 11 km NW of Big Lake, Alaska · 19 km E of this epicentre
  5. 5.6 5 km N of Susitna, Alaska · 2 km NW 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 61.5864, -150.4832. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Anchorage Municipality, AK 79 km (49 mi) SE earthquakes near Anchorage Municipality
Matanuska-Susitna Borough, AK 91 km (57 mi) NNE earthquakes near Matanuska-Susitna Borough

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. 1.6 16 km SW of Point MacKenzie, Alaska
  2. 1.7 9 km NNE of Willow, Alaska
  3. 2.8 23 km S of Susitna, Alaska
  4. 1.8 21 km N of Susitna, Alaska
  5. 1.6 1 km S of Big Lake, Alaska
  6. 1.7 30 km E of Skwentna, Alaska
  7. 1.7 25 km SSW of Susitna, Alaska
  8. 2.7 15 km SSW of Susitna, Alaska
  9. 1.6 26 km WNW of Susitna, Alaska
  10. 1.7 21 km SSE of Susitna, Alaska
  11. 1.9 6 km WNW of Big Lake, Alaska
  12. 1.9 23 km WNW of Susitna, Alaska
  13. 2.3 9 km NW of Big Lake, Alaska
  14. 2.4 24 km SSW of Susitna, Alaska
  15. 1.8 4 km SW of Point MacKenzie, 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.