QuakeIndex

Earthquake · automatic estimate, may change

M 1.5ml

Earthquake near Deltana, AK

USGS: 22 km WSW of Dry Creek, Alaska

1:37 am AKDT, May 10, 2021 · · 13 km deep · released about 5.4 lb of TNT

Every earthquake near Deltana Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Southeast Fairbanks Census Area 97 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
1:37 am AKDT on 10 May 2021 ()
Where
37 km (23 mi) SSE of Deltana, AK · earthquakes near Deltana
Magnitude
M 1.5 (ml)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Southeast Fairbanks Census Area, 97 km ENE
Nearest mapped fault
Granite Mountain fault (Northern Foothills fold and thrust belt), 16 km from its surface trace — near is not the same as on
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 1948 days ago

A magnitude 1.5 earthquake was recorded 37 km (23 mi) SSE of Deltana, AK, at 1:37 am AKDT on 10 May 2021 (09:37 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 12 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.2 30 km SSW of Fort Greely, Alaska · 40 km WNW of this epicentre
  2. 5.7 31 km NNE of Paxson, Alaska · 27 km SSW of this epicentre
  3. 5.6 23 km NNW of Paxson, Alaska · 43 km SW of this epicentre
  4. 5.6 23 km N of Paxson, Alaska · 41 km SW of this epicentre
  5. 5.4 19 km NNE of Paxson, Alaska · 40 km SW 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 63.5490, -145.0612. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Southeast Fairbanks Census Area, AK 97 km (60 mi) ENE earthquakes near Southeast Fairbanks 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 33 km NE of Paxson, Alaska
  2. 1.5 18 km SSW of Dry Creek, Alaska
  3. 1.5 30 km NNE of Paxson, Alaska
  4. 1.7 27 km NNE of Paxson, Alaska
  5. 1.9 29 km NE of Paxson, Alaska
  6. 1.9 30 km NE of Paxson, Alaska
  7. 2.2 28 km NNE of Paxson, Alaska
  8. 1.6 29 km NNE of Paxson, Alaska
  9. 1.7 28 km NNE of Paxson, Alaska
  10. 2.0 29 km NNE of Paxson, Alaska
  11. 1.7 Central Alaska
  12. 2.6 28 km NNE of Paxson, Alaska
  13. 2.5 29 km NNE of Paxson, Alaska
  14. 2.0 28 km NNE of Paxson, Alaska
  15. 1.5 31 km NE 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.