QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

34 km SSW of Glacier View, Alaska

Yes. A magnitude 2.2 earthquake was recorded 34 km SSW of Glacier View, Alaska, at 5:49 am AKDT on 25 October 2018 (13:49 UTC), 18 km deep.

· 18 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Anchorage Municipality 83 kmMatanuska-Susitna Borough 118 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 2.2 (ml)
Depth
18 km below the surface
Felt
no reports yet
Nearest
Anchorage Municipality, 83 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1185 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 3 km (2 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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

The largest earthquake within 50 km since 2016 was M 4.6 on 2018-01-27 — about 4,000 times the energy of this one.

Before 2016, the USGS record lists 16 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.8 31 km SSW of Glacier View, Alaska · 6 km E of this epicentre
  2. 6.4 23 km S of Glacier View, Alaska · 15 km NE of this epicentre
  3. 6.4 37 km SSE of Glacier View, Alaska · 27 km E of this epicentre
  4. 5.9 15 km N of Glacier View, Alaska · 48 km NNE of this epicentre
  5. 5.9 42 km S of Glacier View, Alaska · 20 km ESE 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 61.5220, -147.8995. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Anchorage Municipality, AK 83 km (52 mi) WSW earthquakes near Anchorage Municipality
Matanuska-Susitna Borough, AK 118 km (73 mi) NW earthquakes near Matanuska-Susitna Borough
Chugach Census Area, AK 147 km (91 mi) SE earthquakes near Chugach Census Area

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. 1.6 24 km SSE of Chickaloon, Alaska
  2. 1.7 18 km SSE of Glacier View, Alaska
  3. 1.9 42 km S of Glacier View, Alaska
  4. 1.6 Southern Alaska
  5. 1.5 Southern Alaska
  6. 2.2 13 km SW of Glacier View, Alaska
  7. 1.6 Southern Alaska
  8. 1.6 51 km S of Glacier View, Alaska
  9. 1.8 19 km SSE of Glacier View, Alaska
  10. 1.6 Southern Alaska
  11. 1.6 14 km NW of Glacier View, Alaska
  12. 1.5 59 km S of Glacier View, Alaska
  13. 1.7 44 km NNE of Whittier, Alaska
  14. 1.5 18 km WSW of Glacier View, Alaska
  15. 2.1 52 km SSW of Glacier View, 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.