Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near Seward, AK
No earthquake was likely felt in Seward in the 24 hours to 11:35 am AKST (20:35 UTC). The last one was M 4.3, 83 km (52 mi) W, at 2:30 am AKST on 1 November 2026, estimated intensity II (weak) in town; 115 felt reports to USGS. Every earthquake near Seward
This page: a magnitude 1.6 earthquake was recorded 48 km (30 mi) east of Seward, AK, at 3:05 am AKDT on 13 September 2024 (11:05 UTC), 11 km deep.
USGS: 34 km WNW of Chenega, Alaska
- When
- 3:05 am AKDT on 13 September 2024 ()
- Where
- 48 km (30 mi) east of Seward, AK · earthquakes near Seward
- Magnitude
- M 1.6 (ml)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- Anchorage Municipality, 117 km NNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 756 days ago
Earthquake alerts for Seward, 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 2 km (1 mi) from the epicentre. In Seward, 48 km away, the estimate is intensity I (not felt). 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 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
- Around the size people start to feel M 3.0 130× the energy of this one
- This earthquake M 1.6 about 7.6 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 16,000 times the energy of this one.
Before 2016, the USGS record lists 7 earthquakes of M5 or more within 50 km; the five largest:
- 6.6 3 km SW of Bear Creek, Alaska · 47 km W of this epicentre
- 6.1 25 km WSW of Chenega, Alaska · 23 km SSE of this epicentre
- 5.8 29 km NW of Chenega, Alaska · 13 km NE of this epicentre
- 5.8 33 km ESE of Bear Creek, Alaska · 14 km SW of this epicentre
- 5.7 43 km WSW of Chenega, Alaska · 35 km S 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 60.1778, -148.5952. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Anchorage Municipality, AK | 117 km (73 mi) | NNW | 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.
- 1.7 17 km SSW of Chenega, Alaska
- 1.6 32 km NW of Chenega, Alaska
- 1.5 34 km NW of Chenega, Alaska
- 1.8 25 km SSE of Whittier, Alaska
- 1.8 34 km SSE of Whittier, Alaska
- 1.7 28 km S of Whittier, Alaska
- 1.6 35 km SSE of Whittier, Alaska
- 2.1 41 km SSE of Whittier, Alaska
- 1.8 9 km NW of Chenega, Alaska
- 1.5 38 km WNW of Chenega, Alaska
- 1.5 19 km W of Chenega, Alaska
- 2.8 32 km S of Whittier, Alaska
- 1.6 21 km WNW of Chenega, Alaska
- 1.7 30 km WSW of Chenega, Alaska
- 2.5 24 km WNW of Chenega, 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.