QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

13 km SSW of Tanana, Alaska

· 14 km deep · released about 340 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yukon-Koyukuk Census Area 45 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 2.7 (ml)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Yukon-Koyukuk Census Area, 45 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 911 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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 65.0613, -152.1993. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yukon-Koyukuk Census Area, AK 45 km (28 mi) SW 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

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

  1. 2.3 50 km SSE of Tanana, Alaska
  2. 1.8 37 km S of Tanana, Alaska
  3. 1.7 14 km WNW of Tanana, Alaska
  4. 1.6 15 km SSW of Tanana, Alaska
  5. 1.6 24 km N of Tanana, Alaska
  6. 1.7 49 km SSE of Tanana, Alaska
  7. 2.7 58 km SSW of Tanana, Alaska
  8. 1.7 37 km SSW of Tanana, Alaska
  9. 2.0 32 km SSW of Tanana, Alaska
  10. 2.0 11 km ESE of Tanana, Alaska
  11. 3.0 19 km E of Tanana, Alaska
  12. 1.8 21 km SSW of Tanana, Alaska
  13. 1.6 10 km NNE of Tanana, Alaska
  14. 1.6 33 km WSW of Tanana, Alaska
  15. 1.9 29 km W of Tanana, 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 2021-04-30 — it released about 250 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.