QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

81 km ESE of Yakutat, Alaska

· 15 km deep · released about 11 lb of TNT

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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 1.7 (ml)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Yakutat City and Borough, 137 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1987 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 59.3948, -138.3160. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yakutat City and Borough, AK 137 km (85 mi) ESE 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

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

  1. 1.8 107 km WSW of Mosquito Lake, Alaska
  2. 1.6 72 km ESE of Yakutat, Alaska
  3. 2.3 62 km ESE of Yakutat, Alaska
  4. 1.7 49 km E of Yakutat, Alaska
  5. 1.9 79 km ESE of Yakutat, Alaska
  6. 1.9 50 km E of Yakutat, Alaska
  7. 1.5 50 km E of Yakutat, Alaska
  8. 2.3 50 km E of Yakutat, Alaska
  9. 1.9 58 km ESE of Yakutat, Alaska
  10. 2.1 102 km WSW of Mosquito Lake, Alaska
  11. 2.0 112 km ESE of Yakutat, Alaska
  12. 1.6 92 km E of Yakutat, Alaska
  13. 1.5 83 km E of Yakutat, Alaska
  14. 2.2 109 km ESE of Yakutat, Alaska
  15. 1.5 101 km ESE 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 4.3 on 2021-02-08 — it released about 7,900 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.