QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

Earthquake near Deltana, AK

USGS: 14 km WSW of Deltana, Alaska

10:42 pm AKDT, Apr 10, 2020 · · 21 km deep · released about 120 lb of TNT

Every earthquake near Deltana Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fairbanks North Star Borough 107 kmSoutheast Fairbanks Census Area 111 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
10:42 pm AKDT on 10 April 2020 ()
Where
15 km (9 mi) WSW of Deltana, AK · earthquakes near Deltana
Magnitude
M 2.4 (ml)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Fairbanks North Star Borough, 107 km NNW
Nearest mapped fault
Granite Mountain fault (Northern Foothills fold and thrust belt), under 1 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2344 days ago

A magnitude 2.4 earthquake was recorded 15 km (9 mi) WSW of Deltana, AK, at 10:42 pm AKDT on 10 April 2020 (06:42 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.9× the energy of this one
  4. This earthquake M 2.4 about 120 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 6.2 30 km SSW of Fort Greely, Alaska · 21 km SW of this epicentre
  2. 5.2 32 km SW of Dry Creek, Alaska · 49 km SSE of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 63.8140, -145.4858. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Fairbanks North Star Borough, AK 107 km (66 mi) NNW earthquakes near Fairbanks North Star Borough
Southeast Fairbanks Census Area, AK 111 km (69 mi) E earthquakes near Southeast Fairbanks 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 1 km SSE of Whitestone, Alaska
  2. 2.1 38 km NNE of Paxson, Alaska
  3. 2.0 27 km NW of Healy Lake, Alaska
  4. 2.4 31 km N of Paxson, Alaska
  5. 1.9 32 km NNE of Paxson, Alaska
  6. 1.8 32 km NNE of Paxson, Alaska
  7. 2.0 5 km WSW of Fort Greely, Alaska
  8. 3.8 34 km NNE of Paxson, Alaska
  9. 1.5 43 km WSW of Dry Creek, Alaska
  10. 1.7 3 km SW of Fort Greely, Alaska
  11. 1.6 32 km WSW of Dry Creek, Alaska
  12. 1.7 34 km SW of Dry Creek, Alaska
  13. 1.5 45 km NNW of Paxson, Alaska
  14. 1.8 41 km NNW of Paxson, Alaska
  15. 3.8 34 km NNE of Paxson, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.