QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

129 km SSE of McCarthy, Alaska

· 6.3 km deep · released about 340 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yakutat City and Borough 88 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 2.7 (ml)
Depth
6.3 km below the surface
Felt
no reports yet
Nearest
Yakutat City and Borough, 88 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 687 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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.

Where

Epicentre 60.4072, -141.8138. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yakutat City and Borough, AK 88 km (55 mi) WNW of here earthquakes near Yakutat City and 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. 1.9 106 km WNW of Yakutat, Alaska
  2. 2.4 127 km WNW of Yakutat, Alaska
  3. 2.2 132 km SE of McCarthy, Alaska
  4. 1.6 126 km SE of McCarthy, Alaska
  5. 1.5 130 km NW of Yakutat, Alaska
  6. 1.7 116 km WNW of Yakutat, Alaska
  7. 2.0 118 km WNW of Yakutat, Alaska
  8. 1.9 117 km WNW of Yakutat, Alaska
  9. 1.6 131 km WNW of Yakutat, Alaska
  10. 1.5 135 km NW of Yakutat, Alaska
  11. 1.7 116 km WNW of Yakutat, Alaska
  12. 1.7 129 km SSE of McCarthy, Alaska
  13. 1.6 137 km SE of McCarthy, Alaska
  14. 1.5 131 km SSE of McCarthy, Alaska
  15. 1.5 133 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.0 on 2020-01-22 — it released about 89 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.