QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8ml

22 km SW of Glacier View, Alaska

· 26 km deep · released about 7.6 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Anchorage Municipality 90 kmMatanuska-Susitna Borough 109 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 3.8 (ml)
Depth
26 km below the surface
Felt
55 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
Anchorage Municipality, 90 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2108 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 55 people have reported feeling it to USGS.

How big was it?

This earthquake released about 7.6 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 22,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 710× the energy of this one
  4. This earthquake M 3.8 about 7.6 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 16× more

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 61.6408, -147.9089. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Anchorage Municipality, AK 90 km (56 mi) NE of here earthquakes near Anchorage Municipality
Matanuska-Susitna Borough, AK 109 km (67 mi) SE of here earthquakes near Matanuska-Susitna Borough

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 1.9 20 km SSW of Glacier View, Alaska
  2. 2.1 3 km W of Glacier View, Alaska
  3. 1.6 60 km S of Glacier View, Alaska
  4. 2.2 47 km SSW of Glacier View, Alaska
  5. 1.8 14 km NNE of Glacier View, Alaska
  6. 1.7 58 km S of Glacier View, Alaska
  7. 1.6 54 km S of Glacier View, Alaska
  8. 1.7 54 km S of Glacier View, Alaska
  9. 2.0 47 km S of Glacier View, Alaska
  10. 1.7 55 km SSE of Glacier View, Alaska
  11. 1.6 65 km ESE of Knik River, Alaska
  12. 1.5 48 km S of Glacier View, Alaska
  13. 1.7 45 km S of Glacier View, Alaska
  14. 2.3 34 km S of Glacier View, Alaska
  15. 1.8 22 km NNE of Chickaloon, 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 4.6 on 2018-01-27 — it released about 16 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.