Earthquake · automatic estimate, may change
M 1.5ml
86 km NNW of Karluk, Alaska
Yes. A magnitude 1.5 earthquake was recorded 86 km NNW of Karluk, Alaska at 01:06 UTC on 2025-11-28, 4.9 km deep. The magnitude and location are an automatic first estimate and may change.
- When
- Magnitude
- M 1.5 (ml)
- Depth
- 4.9 km below the surface
- Felt
- no reports yet
- Nearest
- Lake and Peninsula Borough, 76 km WSW
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 348 days ago
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 9 km (6 mi) from the epicentre. 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 5.9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
- Around the size people start to feel M 3.0 160× the energy of this one
- This earthquake M 1.5 about 5.9 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 5.2 on 2019-01-22 — about 320,000 times the energy of this one.
Before 2016, the USGS record lists 49 earthquakes of M5 or more within 50 km; the five largest:
- 7.0 Event 36 Novarupta-Mount Katmai area, Alaska Peninsula · 9 km ENE of this epicentre
- 6.8 Event 37 Novarupta-Mount Katmai area, Alaska Peninsula · 9 km ENE of this epicentre
- 6.8 Event 48 Novarupta-Mount Katmai area, Alaska Peninsula · 3 km WNW of this epicentre
- 6.6 Event 39 Novarupta-Mount Katmai area, Alaska Peninsula · 9 km ENE of this epicentre
- 6.5 Event 21 Novarupta-Mount Katmai area, Alaska Peninsula · 9 km ENE 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 58.2595, -155.1408. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lake and Peninsula Borough, AK | 76 km (48 mi) | WSW | earthquakes near Lake and Peninsula Borough |
| Kodiak Island Borough, AK | 95 km (59 mi) | SE | earthquakes near Kodiak Island Borough |
| Bristol Bay Borough, AK | 120 km (74 mi) | WNW | earthquakes near Bristol Bay 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.
- 3.4 77 km NNW of Karluk, Alaska
- 1.7 72 km NNW of Karluk, Alaska
- 1.8 62 km NW of Karluk, Alaska
- 1.7 86 km NNW of Karluk, Alaska
- 1.5 61 km NNW of Karluk, Alaska
- 1.9 76 km NW of Karluk, Alaska
- 1.8 85 km N of Karluk, Alaska
- 2.5 82 km SSE of Igiugig, Alaska
- 1.7 78 km NW of Karluk, Alaska
- 2.3 81 km NNW of Karluk, Alaska
- 2.2 46 km NW of Karluk, Alaska
- 1.6 48 km NW of Karluk, Alaska
- 1.5 77 km NNW of Karluk, Alaska
- 1.6 83 km NNW of Karluk, Alaska
- 1.7 93 km ESE of King Salmon, 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.