QuakeIndex

Earthquake · automatic estimate, may change

M 1.6ml

42 km W of Four Mile Road, Alaska

· 5.6 km deep · released about 7.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Denali Borough 103 kmYukon-Koyukuk Census Area 112 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 1.6 (ml)
Depth
5.6 km below the surface
Felt
no reports yet
Nearest
Denali Borough, 103 km S
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 341 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 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 64.6123, -150.0177. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Denali Borough, AK 103 km (64 mi) N of here earthquakes near Denali Borough
Yukon-Koyukuk Census Area, AK 112 km (70 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

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

  1. 1.6 38 km WNW of Four Mile Road, Alaska
  2. 2.4 58 km SSE of Manley Hot Springs, Alaska
  3. 1.9 39 km WNW of Anderson, Alaska
  4. 1.7 20 km W of Clear, Alaska
  5. 1.7 38 km WNW of Four Mile Road, Alaska
  6. 1.6 23 km WSW of Four Mile Road, Alaska
  7. 1.5 40 km SE of Manley Hot Springs, Alaska
  8. 1.7 40 km W of Clear, Alaska
  9. 1.6 39 km WNW of Four Mile Road, Alaska
  10. 1.5 32 km SE of Manley Hot Springs, Alaska
  11. 1.8 21 km W of Four Mile Road, Alaska
  12. 2.0 37 km WNW of Four Mile Road, Alaska
  13. 2.1 30 km NW of Four Mile Road, Alaska
  14. 1.5 50 km S of Manley Hot Springs, Alaska
  15. 1.8 31 km W of Anderson, 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 2016-12-08 — it released about 11,000 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.