Earthquake · reviewed by a seismologist
M 2.7ml
Earthquake near Seward, AK
No earthquake was likely felt in Seward in the 24 hours to 10:08 am AKST (19:08 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 2.7 earthquake was recorded 44 km (27 mi) north of Seward, AK, at 11:41 am AKDT on 11 August 2019 (19:41 UTC), 31 km deep. 1 person has reported feeling it to USGS.
USGS: 8 km W of Moose Pass, Alaska
82 km (51 mi) SSE of Anchorage, AK
- When
- 11:41 am AKDT on 11 August 2019 ()
- Where
- 44 km (27 mi) north of Seward, AK · earthquakes near Seward
- Magnitude
- M 2.7 (ml)
- Depth
- 31 km below the surface
- Felt
- 1 report · strongest reported intensity III
- Nearest
- Anchorage Municipality, 76 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2572 days ago
Earthquake alerts for Seward, AK
Get a notification in this browser when USGS records an earthquake near Seward, AK. No account or email needed.
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 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 Seward, 44 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 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
- Magna, Utah 2020 M 5.7 32,000× the energy of this one
- Around the size people start to feel M 3.0 2.8× the energy of this one
- This earthquake M 2.7 about 340 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 4.0 on 2016-10-02 — about 89 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 · 50 km WNW of this epicentre
- 6.6 3 km SW of Bear Creek, Alaska · 40 km S of this epicentre
- 5.7 13 km S of Girdwood, Alaska · 40 km NNE of this epicentre
- 5.6 17 km W of Whittier, Alaska · 40 km NE of this epicentre
- 5.3 16 km WSW of Whittier, Alaska · 40 km NE 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 60.4994, -149.5320. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Anchorage Municipality, AK | 76 km (47 mi) | N | earthquakes near Anchorage Municipality |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
54 earthquakes have been recorded within 50 km since this one.
- 2.5 28 km NNW of Cooper Landing, Alaska
- 2.5 2 km NW of Seward, Alaska
- 1.5 20 km WSW of Hope, Alaska
- 1.5 17 km SE of Primrose, Alaska
- 2.2 12 km SSE of Girdwood, Alaska
- 1.6 11 km NNE of Sunrise, AK
- 1.5 22 km NE of Moose Pass, Alaska
- 1.6 19 km NNW of Cooper Landing, Alaska
- 1.5 12 km NW of Cooper Landing, Alaska
- 1.9 11 km NE of Moose Pass, Alaska
- 1.5 20 km NNE of Cooper Landing, Alaska
- 1.5 12 km SW of Hope, Alaska
- 1.6 20 km NE of Moose Pass, Alaska
- 1.8 13 km W of Cooper Landing, Alaska
- 1.8 17 km SSW of Hope, 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.