Earthquake · reviewed by a seismologist
M 2.3ml
Earthquake near Girdwood, AK
No earthquake was likely felt in Girdwood in the 24 hours to 3:52 am AKST (12:52 UTC). The last one was M 1.8, 8 km (5 mi) SE, at 10:01 am AKDT on 19 October 2026, estimated intensity II (weak) in town. Every earthquake near Girdwood
This page: a magnitude 2.3 earthquake was recorded 37 km (23 mi) south-southwest of Girdwood, AK, at 2:25 am AKDT on 8 September 2024 (10:25 UTC), 19 km deep.
USGS: 19 km NNW of Moose Pass, Alaska
66 km (41 mi) SSE of Anchorage, AK
- When
- 2:25 am AKDT on 8 September 2024 ()
- Where
- 37 km (23 mi) south-southwest of Girdwood, AK · earthquakes near Girdwood
- Magnitude
- M 2.3 (ml)
- Depth
- 19 km below the surface
- Felt
- no reports yet
- Nearest
- Anchorage Municipality, 59 km NNE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 728 days ago
Earthquake alerts for Girdwood, AK
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
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 6 km (4 mi) from the epicentre. In Girdwood, 37 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 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
- Magna, Utah 2020 M 5.7 130,000× the energy of this one
- Around the size people start to feel M 3.0 11× the energy of this one
- This earthquake M 2.3 about 85 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 4.4 on 2022-07-12 — about 1,400 times the energy of this one.
Before 2016, the USGS record lists 5 earthquakes of M5 or more within 50 km:
- 6.8 24 km ENE of Sterling, Alaska · 48 km W of this epicentre
- 5.7 13 km S of Girdwood, Alaska · 25 km NE of this epicentre
- 5.6 17 km W of Whittier, Alaska · 30 km ENE of this epicentre
- 5.3 16 km WSW of Whittier, Alaska · 30 km ENE of this epicentre
- 5.1 16 km WNW of Hope, Alaska · 43 km NNW 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 60.6519, -149.5041. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Anchorage Municipality, AK | 59 km (37 mi) | NNE | earthquakes near Anchorage Municipality |
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.
- 2.9 28 km SW of Hope, Alaska
- 1.6 12 km SW of Cooper Landing, Alaska
- 1.5 20 km W of Hope, Alaska
- 1.5 5 km SE of Sunrise, Alaska
- 2.8 15 km NNW of Hope, Alaska
- 1.5 19 km N of Moose Pass, Alaska
- 1.6 21 km N of Moose Pass, Alaska
- 2.8 19 km S of Sunrise, Alaska
- 1.8 16 km N of Moose Pass, Alaska
- 2.8 21 km N of Moose Pass, Alaska
- 1.6 10 km NNW of Hope, Alaska
- 1.6 17 km S of Girdwood, Alaska
- 1.6 15 km SSW of Sunrise, Alaska
- 2.0 3 km NNW of Sunrise, Alaska
- 2.2 21 km NNE of Cooper Landing, 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
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.