QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

33 km S of Manley Hot Springs, Alaska

· 16 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yukon-Koyukuk Census Area 87 kmDenali Borough 117 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 2.1 (ml)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Yukon-Koyukuk Census Area, 87 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2073 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 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 64.7013, -150.6476. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yukon-Koyukuk Census Area, AK 87 km (54 mi) SSE of here earthquakes near Yukon-Koyukuk Census Area
Denali Borough, AK 117 km (73 mi) NNW of here earthquakes near Denali Borough

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 1.9 Central Alaska
  2. 1.6 44 km SSE of Manley Hot Springs, Alaska
  3. 1.6 51 km S of Manley Hot Springs, Alaska
  4. 1.6 55 km W of Anderson, Alaska
  5. 1.7 28 km S of Manley Hot Springs, Alaska
  6. 2.2 32 km SSW of Manley Hot Springs, Alaska
  7. 2.3 33 km SSW of Manley Hot Springs, Alaska
  8. 1.9 Central Alaska
  9. 1.6 30 km S of Manley Hot Springs, Alaska
  10. 1.6 11 km WSW of Manley Hot Springs, Alaska
  11. 2.4 12 km NNE of Manley Hot Springs, Alaska
  12. 1.5 Central Alaska
  13. 1.6 60 km S of Manley Hot Springs, Alaska
  14. 1.8 55 km S of Manley Hot Springs, Alaska
  15. 2.1 22 km SW 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 4.1 on 2018-11-13 — it released about 1,000 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.