QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7ml

Earthquake near Nikiski, AK

No earthquake was likely felt in Nikiski in the 24 hours to 11:29 am AKST (20:29 UTC). The last one was M 4.3, 58 km (36 mi) SSE, at 2:30 am AKST on 1 November 2026, estimated intensity II (weak) in town; 115 felt reports to USGS. Every earthquake near Nikiski

This page: a magnitude 3.7 earthquake was recorded 12 km (8 mi) north of Nikiski, AK, at 6:22 am AKDT on 14 May 2022 (14:22 UTC), 63 km deep. 7 people have reported feeling it to USGS.

USGS: 12 km N of Nikiski, Alaska

87 km (54 mi) WSW of Anchorage, AK

6:22 am AKDT, May 14, 2022 · · 63 km deep · released about 5.4 tons of TNT

Every earthquake near Nikiski Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kenai Peninsula Borough 75 kmAnchorage Municipality 114 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
6:22 am AKDT on 14 May 2022 ()
Where
12 km (8 mi) north of Nikiski, AK · earthquakes near Nikiski
Magnitude
M 3.7 (ml)
Depth
63 km below the surface
Felt
7 reports · strongest reported intensity II
Measured shaking
intensity III (ShakeMap)
Nearest
Kenai Peninsula Borough, 75 km SW
Nearest mapped fault
Middle Ground Shoal anticline (Cook Inlet folds), 13 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 1574 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 42 km (26 mi) from the epicentre. In Nikiski, 12 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: Nikiski 12 km, intensity II · Kenai 27 km, intensity II · Soldotna 37 km, intensity II · Sterling 40 km, intensity II · Kalifornsky 43 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 5.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 32,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,000× the energy of this one
  4. This earthquake M 3.7 about 5.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 11× more

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 2017-07-07 — about 7.9 times the energy of this one.

Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.8 Southern Alaska · 34 km NNE of this epicentre
  2. 6.8 4 km NE of Beluga, Alaska · 43 km NNE of this epicentre
  3. 6.7 6 km WNW of Nikiski, Alaska · 12 km SW of this epicentre
  4. 6.4 19 km SSE of Tyonek, Alaska · 16 km NE of this epicentre
  5. 5.8 17 km NW of Beluga, Alaska · 48 km N 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 60.8006, -151.2621. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kenai Peninsula Borough, AK 75 km (47 mi) SW earthquakes near Kenai Peninsula Borough
Anchorage Municipality, AK 114 km (71 mi) ENE earthquakes near Anchorage Municipality

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

Aftershocks so far

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

  1. 2.2 15 km WNW of Point Possession, Alaska
  2. 1.9 13 km NW of Point Possession, Alaska
  3. 1.9 13 km NW of Nikiski, Alaska
  4. 1.5 14 km NNW of Beluga, Alaska
  5. 1.6 29 km W of Tyonek, Alaska
  6. 1.8 6 km W of Tyonek, Alaska
  7. 1.7 4 km W of Tyonek, Alaska
  8. 1.6 33 km W of Tyonek, Alaska
  9. 1.7 19 km WNW of Kalifornsky, Alaska
  10. 1.7 6 km NE of Kenai, Alaska
  11. 2.4 18 km W of Nikiski, Alaska
  12. 1.5 9 km SSW of Point Possession, Alaska
  13. 1.5 25 km WNW of Tyonek, Alaska
  14. 1.7 17 km N of Point Possession, Alaska
  15. 1.7 21 km WNW of Salamatof, 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.