Earthquake · reviewed by a seismologist
M 1.9ml
Earthquake near Girdwood, AK
No earthquake was likely felt in Girdwood in the 24 hours to 7:55 am AKST (16:55 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 1.9 earthquake was recorded 32 km (20 mi) south-southwest of Girdwood, AK, at 12:35 am AKST on 29 November 2023 (09:35 UTC), 12 km deep.
USGS: 20 km N of Moose Pass, Alaska
67 km (42 mi) SSE of Anchorage, AK
- When
- 12:35 am AKST on 29 November 2023 ()
- Where
- 32 km (20 mi) south-southwest of Girdwood, AK · earthquakes near Girdwood
- Magnitude
- M 1.9 (ml)
- Depth
- 12 km below the surface
- Felt
- no reports yet
- Nearest
- Anchorage Municipality, 56 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1066 days ago
Earthquake alerts for Girdwood, AK
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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 8 km (5 mi) from the epicentre. In Girdwood, 32 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
- Magna, Utah 2020 M 5.7 500,000× the energy of this one
- Around the size people start to feel M 3.0 45× the energy of this one
- This earthquake M 1.9 about 21 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 5,600 times the energy of this one.
Before 2016, the USGS record lists 5 earthquakes of M5 or more within 50 km:
- 6.0 21 km N of Whittier, Alaska · 50 km NE of this epicentre
- 5.7 13 km S of Girdwood, Alaska · 19 km NNE of this epicentre
- 5.6 17 km W of Whittier, Alaska · 22 km ENE of this epicentre
- 5.3 16 km WSW of Whittier, Alaska · 22 km ENE of this epicentre
- 5.1 16 km WNW of Hope, Alaska · 45 km NW 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 60.6730, -149.3682. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Anchorage Municipality, AK | 56 km (35 mi) | N | earthquakes near Anchorage Municipality |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 1.9 10 km SSE of Sunrise, Alaska
- 1.5 12 km WNW of Whittier, Alaska
- 1.8 18 km E of Moose Pass, Alaska
- 1.8 18 km E of Crown Point, Alaska
- 2.0 8 km WSW of Sunrise, Alaska
- 2.4 6 km NNW of Hope, Alaska
- 1.5 14 km W of Whittier, Alaska
- 2.0 11 km ESE of Girdwood, Alaska
- 1.7 15 km SW of Hope, Alaska
- 1.5 2 km NNW of Hope, Alaska
- 1.5 16 km NE of Girdwood, Alaska
- 2.4 2 km WSW of Hope, Alaska
- 1.7 10 km ENE of Cooper Landing, Alaska
- 1.5 7 km NNW of Hope, Alaska
- 2.4 13 km WSW of Whittier, 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.