QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

139 km S of McCarthy, Alaska

Yes. A magnitude 2.5 earthquake was recorded 139 km S of McCarthy, Alaska at 04:17 UTC on 2026-07-08, 20 km deep.

· 20 km deep · released about 170 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yakutat City and Borough 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
Magnitude
M 2.5 (ml)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Yakutat City and Borough, 114 km E
Nearest mapped fault
Miller Creek fault (Chugach-St. Elias fold and thrust belt), 5 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 55 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 10 km (6 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 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 2017-11-13 — about 500 times the energy of this one.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

  1. 6.7 163 km W of Yakutat, Alaska · 49 km S of this epicentre
  2. 5.8 162 km WNW of Yakutat, Alaska · 29 km S of this epicentre
  3. 5.5 164 km S of McCarthy, Alaska · 26 km SSW 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 60.2020, -142.4350. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Yakutat City and Borough, AK 114 km (71 mi) E earthquakes near Yakutat City and Borough

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

Aftershocks so far

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

  1. 1.1 110 km SSE of McCarthy, Alaska
  2. 2.1 109 km SSE of McCarthy, Alaska
  3. 1.5 94 km S of McCarthy, Alaska
  4. 1.1 123 km S of McCarthy, Alaska
  5. 1.1 99 km S of McCarthy, Alaska
  6. 1.1 109 km S of McCarthy, Alaska
  7. 1.6 101 km S of McCarthy, Alaska
  8. 1.2 93 km S of McCarthy, Alaska
  9. 1.0 117 km S of McCarthy, Alaska
  10. 1.1 128 km SSE of McCarthy, Alaska
  11. 1.8 93 km S of McCarthy, Alaska
  12. 1.0 110 km S of McCarthy, Alaska
  13. 1.4 109 km SSE of McCarthy, Alaska
  14. 0.9 111 km S of McCarthy, Alaska
  15. 2.3 140 km S 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.