QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

109 km ESE of Chenega, Alaska

Yes. A magnitude 2.2 earthquake was recorded 109 km ESE of Chenega, Alaska, at 8:44 pm AKST on 13 November 2022 (05:44 UTC), 30 km deep.

· 30 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Chugach Census Area 103 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
Magnitude
M 2.2 (ml)
Depth
30 km below the surface
Felt
no reports yet
Nearest
Chugach Census Area, 103 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1445 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. 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 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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 9 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.1 101 km SE of Chenega, Alaska · 9 km W of this epicentre
  2. 6.0 78 km S of Cordova, Alaska · 43 km NE of this epicentre
  3. 5.7 75 km SE of Chenega, Alaska · 37 km WNW of this epicentre
  4. 5.7 100 km ESE of Chenega, Alaska · 9 km NW of this epicentre
  5. 5.7 122 km SE of Chenega, Alaska · 20 km S 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 59.5610, -146.3445. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Chugach Census Area, AK 103 km (64 mi) N earthquakes near Chugach Census Area

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

Aftershocks so far

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

  1. 2.0 77 km ESE of Chenega, Alaska
  2. 2.0 74 km SSW of Cordova, Alaska
  3. 1.6 98 km SE of Chenega, Alaska
  4. 1.5 64 km SSW of Cordova, Alaska
  5. 1.8 106 km SE of Chenega, Alaska
  6. 2.6 80 km ESE of Chenega, Alaska
  7. 2.5 65 km SSW of Cordova, Alaska
  8. 1.9 83 km SSW of Cordova, Alaska
  9. 2.0 80 km SSW of Cordova, Alaska
  10. 2.0 84 km SSW of Cordova, Alaska
  11. 2.3 81 km S of Cordova, Alaska
  12. 1.9 77 km ESE of Chenega, Alaska
  13. 1.9 78 km E of Chenega, Alaska
  14. 2.6 76 km ESE of Chenega, Alaska
  15. 2.3 80 km ESE of Chenega, 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.