QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5ml

Earthquake near Haines, AK

No earthquake was likely felt in Haines in the 24 hours to 3:53 pm AKST (00:53 UTC). The last one was M 3.5, 60 km (37 mi) NW, at 3:19 am AKDT on 8 April 2026, estimated intensity II (weak) in town; 3 felt reports to USGS. Every earthquake near Haines

This page: a magnitude 3.5 earthquake was recorded 46 km (28 mi) west of Haines, AK, at 12:53 pm AKDT on 8 July 2021 (20:53 UTC), 5.3 km deep. 8 people have reported feeling it to USGS.

USGS: 30 km SSW of Covenant Life, Alaska

12:53 pm AKDT, Jul 8, 2021 · · 5.3 km deep · released about 2.7 tons of TNT

Every earthquake near Haines Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Haines Borough 39 kmSkagway Municipality 67 kmHoonah-Angoon Census Area 87 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
12:53 pm AKDT on 8 July 2021 ()
Where
46 km (28 mi) west of Haines, AK · earthquakes near Haines
Magnitude
M 3.5 (ml)
Depth
5.3 km below the surface
Felt
8 reports · strongest reported intensity III
Measured shaking
intensity IV (ShakeMap)
Nearest
Haines Borough, 39 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1864 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, people at rest would likely notice it out to about 63 km (39 mi) from the epicentre. In Haines, 46 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.

Likely felt in: Haines 46 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 2.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 63,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,000× the energy of this one
  4. This earthquake M 3.5 about 2.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.6× 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

The largest earthquake within 50 km since 2016 was M 4.4 on 2021-07-08 — about 22 times the energy of this one.

Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:

  1. 6.1 77 km SW of Covenant Life, Alaska · 50 km SW of this epicentre
  2. 5.9 41 km SSW of Covenant Life, Alaska · 13 km SW of this epicentre
  3. 5.5 27 km WSW of Covenant Life, Alaska · 22 km NW of this epicentre
  4. 5.2 63 km SW of Covenant Life, Alaska · 35 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 59.1675, -136.2382. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Haines Borough, AK 39 km (24 mi) E earthquakes near Haines Borough
Skagway Municipality, AK 67 km (42 mi) NE earthquakes near Skagway Municipality
Hoonah-Angoon Census Area, AK 87 km (54 mi) SSE earthquakes near Hoonah-Angoon Census Area
Juneau City and Borough, AK 148 km (92 mi) SE earthquakes near Juneau City and 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. 1.7 44 km SSW of Covenant Life, Alaska
  2. 1.5 29 km SSW of Covenant Life, Alaska
  3. 1.5 27 km SW of Covenant Life, Alaska
  4. 1.6 31 km SSW of Covenant Life, Alaska
  5. 1.6 13 km S of Covenant Life, Alaska
  6. 2.2 43 km SW of Mud Bay, Alaska
  7. 1.6 34 km WSW of Covenant Life, Alaska
  8. 1.7 27 km WSW of Mosquito Lake, Alaska
  9. 1.7 57 km NNW of Gustavus, Alaska
  10. 1.7 18 km WSW of Mosquito Lake, Alaska
  11. 2.1 49 km SSW of Covenant Life, Alaska
  12. 1.5 61 km NW of Gustavus, Alaska
  13. 1.6 28 km WSW of Covenant Life, Alaska
  14. 1.5 50 km SW of Covenant Life, Alaska
  15. 1.8 50 km SW of Covenant Life, 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.