QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

133 km SSE of McCarthy, Alaska

Yes. A magnitude 2.4 earthquake was recorded 133 km SSE of McCarthy, Alaska at 19:50 UTC on 2022-07-01, 7.7 km deep.

· 7.7 km deep · released about 120 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yakutat City and Borough 92 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 2.4 (ml)
Depth
7.7 km below the surface
Felt
no reports yet
Nearest
Yakutat City and Borough, 92 km ESE
Nearest mapped fault
Kosakuts fault (Chugach-St. Elias fold and thrust belt), under 1 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 1532 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 20 km (12 mi) from the epicentre. 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 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.9× the energy of this one
  4. This earthquake M 2.4 about 120 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 7 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.1 113 km SE of McCarthy, Alaska · 40 km NNE of this epicentre
  2. 5.9 115 km NW of Yakutat, Alaska · 39 km ESE of this epicentre
  3. 5.5 112 km NW of Yakutat, Alaska · 39 km ESE of this epicentre
  4. 5.2 104 km NW of Yakutat, Alaska · 49 km ESE of this epicentre
  5. 5.1 103 km NW of Yakutat, Alaska · 49 km ESE 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 60.3333, -141.9521. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Yakutat City and Borough, AK 92 km (57 mi) ESE earthquakes near Yakutat City and Borough

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

Aftershocks so far

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

  1. 1.6 131 km NW of Yakutat, Alaska
  2. 1.7 121 km WNW of Yakutat, Alaska
  3. 1.5 Southern Alaska
  4. 1.6 108 km SE of McCarthy, Alaska
  5. 2.9 Southern Alaska
  6. 1.5 Southern Alaska
  7. 1.7 104 km SSE of McCarthy, Alaska
  8. 1.6 126 km WNW of Yakutat, Alaska
  9. 1.5 122 km WNW of Yakutat, Alaska
  10. 1.7 Southeastern Alaska
  11. 1.7 132 km SSE of McCarthy, Alaska
  12. 2.0 113 km SSE of McCarthy, Alaska
  13. 1.9 123 km WNW of Yakutat, Alaska
  14. 1.9 136 km NW of Yakutat, Alaska
  15. 1.9 116 km SSE of McCarthy, 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.