QuakeIndex

Earthquake · automatic estimate, may change

M 1.8ml

25 km NNW of Manley Hot Springs, Alaska

· 9.9 km deep · released about 15 lb of TNT

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10 km30 km60 km120 km N Yukon-Koyukuk Census Area 40 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 1.8 (ml)
Depth
9.9 km below the surface
Felt
no reports yet
Nearest
Yukon-Koyukuk Census Area, 40 km WNW
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 337 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 65.2185, -150.8123. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yukon-Koyukuk Census Area, AK 40 km (25 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

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

  1. 1.6 17 km SE of Manley Hot Springs, Alaska
  2. 1.5 38 km ENE of Tanana, Alaska
  3. 1.6 30 km W of Manley Hot Springs, Alaska
  4. 1.7 23 km SSW of Manley Hot Springs, Alaska
  5. 2.4 24 km SSW of Manley Hot Springs, Alaska
  6. 2.4 25 km SSW of Manley Hot Springs, Alaska
  7. 1.5 18 km NNE of Manley Hot Springs, Alaska
  8. 1.6 22 km NNE of Manley Hot Springs, Alaska
  9. 1.6 18 km NNE of Manley Hot Springs, Alaska
  10. 2.2 25 km SSW of Manley Hot Springs, Alaska
  11. 1.5 14 km NE of Manley Hot Springs, Alaska
  12. 1.8 12 km NE of Manley Hot Springs, Alaska
  13. 2.1 10 km NNE of Manley Hot Springs, Alaska
  14. 1.6 12 km NE of Manley Hot Springs, Alaska
  15. 1.6 13 km NNE 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 4.7 on 2018-08-28 — 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.