QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2ml

Earthquake near Healy, AK

No earthquake was likely felt in Healy in the 24 hours to 3:19 am AKST (12:19 UTC). The last one was M 2.7, 23 km (14 mi) NNE, at 4:13 pm AKST on 3 November 2026, estimated intensity II (weak) in town. Every earthquake near Healy

This page: a magnitude 3.2 earthquake was recorded 50 km (31 mi) east-southeast of Healy, AK, at 2:58 am AKDT on 5 August 2022 (10:58 UTC), 85 km deep. 1 person has reported feeling it to USGS.

USGS: 43 km E of Denali Park, Alaska

2:58 am AKDT, Aug 5, 2022 · · 85 km deep · released about 1,900 lb of TNT

Every earthquake near Healy Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Denali Borough 98 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
2:58 am AKDT on 5 August 2022 ()
Where
50 km (31 mi) east-southeast of Healy, AK · earthquakes near Healy
Magnitude
M 3.2 (ml)
Depth
85 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Denali Borough, 98 km W
Nearest mapped fault
Park Road fault (Northern Foothills fold and thrust belt), 20 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 1493 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Healy, 50 km away, the estimate is intensity II (weak). 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 1,900 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 180,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,600× the energy of this one
  4. This earthquake M 3.2 about 1,900 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 2× 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.

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 7 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.9 2002 Denali Fault, Alaska Earthquake · 34 km ESE of this epicentre
  2. 6.6 53 km ENE of Cantwell, Alaska · 19 km SSE of this epicentre
  3. 6.1 35 km E of Healy, Alaska · 27 km NNW of this epicentre
  4. 5.1 77 km E of Cantwell, Alaska · 35 km ESE of this epicentre
  5. 5.1 78 km ESE of McKinley Park, Alaska · 36 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 63.6707, -148.0476. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Denali Borough, AK 98 km (61 mi) W earthquakes near Denali Borough
Fairbanks North Star Borough, AK 134 km (83 mi) NNE earthquakes near Fairbanks North Star Borough

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

Aftershocks so far

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

  1. 1.5 55 km ENE of Cantwell, Alaska
  2. 3.4 24 km ENE of Healy, Alaska
  3. 1.5 Central Alaska
  4. 2.6 60 km E of Cantwell, Alaska
  5. 1.6 Central Alaska
  6. 2.5 40 km ENE of Healy, Alaska
  7. 1.6 23 km ENE of Denali Park, Alaska
  8. 1.8 50 km ESE of Denali Park, Alaska
  9. 2.2 Central Alaska
  10. 1.9 67 km ESE of Denali Park, Alaska
  11. 1.6 64 km E of Cantwell, Alaska
  12. 1.6 31 km E of Cantwell, Alaska
  13. 1.6 62 km SW of Harding-Birch Lakes, Alaska
  14. 1.5 25 km ENE of Healy, Alaska
  15. 2.2 71 km E of Cantwell, 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.