QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

27 km N of Four Mile Road, Alaska

· 4.9 km deep · released about 7.6 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 1.6 (ml)
Depth
4.9 km below the surface
Felt
no reports yet
Nearest
Yukon-Koyukuk Census Area, 127 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 202 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 64.8490, -149.1610. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yukon-Koyukuk Census Area, AK 127 km (79 mi) ESE 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. 1.7 19 km NNW of Four Mile Road, Alaska
  2. 2.7 25 km N of Four Mile Road, Alaska
  3. 2.0 11 km N of Four Mile Road, Alaska
  4. 1.6 28 km W of Ester, Alaska
  5. 1.6 14 km N of Four Mile Road, Alaska
  6. 1.8 18 km WSW of Nenana, Alaska
  7. 1.6 13 km NW of Four Mile Road, Alaska
  8. 1.6 5 km NW of Four Mile Road, Alaska
  9. 1.9 30 km NW of Four Mile Road, Alaska
  10. 1.7 23 km ENE of Four Mile Road, Alaska
  11. 2.4 26 km N of Four Mile Road, Alaska
  12. 2.1 25 km N of Four Mile Road, Alaska
  13. 2.6 26 km N of Four Mile Road, Alaska
  14. 2.3 27 km N of Four Mile Road, Alaska
  15. 1.9 7 km W of Four Mile Road, 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 4.5 on 2019-04-11 — it released about 22,000 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.