QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

142 km ESE of McCarthy, Alaska

· 16 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yakutat City and Borough 120 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 1.9 (ml)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Yakutat City and Borough, 120 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 46 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 61.0930, -140.3670. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yakutat City and Borough, AK 120 km (74 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

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

  1. 1.8 150 km ESE of McCarthy, Alaska
  2. 1.5 139 km ESE of McCarthy, Alaska
  3. 1.8 140 km ESE of McCarthy, Alaska
  4. 2.2 140 km ESE of McCarthy, Alaska
  5. 1.7 140 km ESE of McCarthy, Alaska
  6. 1.9 146 km E of McCarthy, Alaska
  7. 1.8 151 km ESE of McCarthy, Alaska
  8. 1.8 154 km ESE of McCarthy, Alaska
  9. 1.7 149 km ESE of McCarthy, Alaska
  10. 1.8 151 km ESE of McCarthy, Alaska
  11. 1.7 151 km ESE of McCarthy, Alaska
  12. 1.6 113 km E of McCarthy, Alaska
  13. 1.6 145 km N of Yakutat, Alaska
  14. 1.8 128 km N of Yakutat, Alaska
  15. 3.2 136 km E 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 4.9 on 2021-05-09 — it released about 32,000 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.