QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

122 km NNW of Yakutat, Alaska

· 1.9 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yakutat City and Borough 68 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 1.8 (ml)
Depth
1.9 km below the surface
Felt
no reports yet
Nearest
Yakutat City and Borough, 68 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 225 days ago

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

How big was it?

This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 60.6210, -140.1980. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yakutat City and Borough, AK 68 km (42 mi) N 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

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

  1. 1.9 111 km N of Yakutat, Alaska
  2. 1.8 113 km N of Yakutat, Alaska
  3. 2.1 118 km N of Yakutat, Alaska
  4. 2.0 118 km N of Yakutat, Alaska
  5. 1.9 117 km N of Yakutat, Alaska
  6. 1.8 109 km N of Yakutat, Alaska
  7. 2.0 115 km N of Yakutat, Alaska
  8. 1.9 118 km N of Yakutat, Alaska
  9. 1.7 111 km N of Yakutat, Alaska
  10. 1.8 117 km N of Yakutat, Alaska
  11. 2.0 113 km N of Yakutat, Alaska
  12. 1.5 112 km N of Yakutat, Alaska
  13. 1.7 107 km N of Yakutat, Alaska
  14. 2.2 115 km N of Yakutat, Alaska
  15. 2.1 104 km N of Yakutat, 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 5.2 on 2022-01-08 — it released about 130,000 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.