QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

35 km W of Anderson, Alaska

· 17 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Denali Borough 75 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
17 km below the surface
Felt
no reports yet
Nearest
Denali Borough, 75 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 300 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 5.8 730,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 520,000× the energy of this one
  3. Around the size people start to feel M 3.0 46× 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 64.3549, -149.9126. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Denali Borough, AK 75 km (47 mi) N of here earthquakes near Denali Borough
Yukon-Koyukuk Census Area, AK 138 km (86 mi) SE of here earthquakes near Yukon-Koyukuk Census Area

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. 1.8 46 km W of Clear, Alaska
  2. 1.6 39 km WSW of Four Mile Road, Alaska
  3. 1.7 27 km W of Anderson, Alaska
  4. 2.1 24 km W of Anderson, Alaska
  5. 1.8 18 km WSW of Nenana, Alaska
  6. 1.5 33 km W of Four Mile Road, Alaska
  7. 1.5 43 km W of Ferry, Alaska
  8. 1.6 38 km WNW of Four Mile Road, Alaska
  9. 2.4 58 km SSE of Manley Hot Springs, Alaska
  10. 1.9 39 km WNW of Anderson, Alaska
  11. 1.7 20 km W of Clear, Alaska
  12. 1.7 38 km WNW of Four Mile Road, Alaska
  13. 1.8 48 km WSW of Clear, Alaska
  14. 1.6 23 km WSW of Four Mile Road, Alaska
  15. 1.5 40 km SE of Manley Hot Springs, 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 4.4 on 2021-06-19 — it released about 5,800 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.