Earthquake · reviewed by a seismologist
M 1.8ml
93 km S of McCarthy, Alaska
Yes. A magnitude 1.8 earthquake was recorded 93 km S of McCarthy, Alaska at 04:15 UTC on 2026-10-26, less than 1 km deep.
- When
- Magnitude
- M 1.8 (ml)
- Depth
- 0.9 km below the surface
- Felt
- no reports yet
- Nearest
- Yakutat City and Borough, 137 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 18 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 14 km (9 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 710,000× the energy of this one
- Around the size people start to feel M 3.0 63× the energy of this one
- This earthquake M 1.8 about 15 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 4.3 on 2017-11-13 — about 5,600 times the energy of this one.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
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 60.6140, -142.5900. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Yakutat City and Borough, AK | 137 km (85 mi) | ESE | earthquakes near Yakutat City and Borough |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
19 earthquakes have been recorded within 50 km since this one.
- 1.2 101 km S of McCarthy, Alaska
- 1.1 110 km SSE of McCarthy, Alaska
- 2.1 109 km SSE of McCarthy, Alaska
- 1.5 94 km S of McCarthy, Alaska
- 1.0 79 km SSE of McCarthy, Alaska
- 1.1 123 km S of McCarthy, Alaska
- 1.1 99 km S of McCarthy, Alaska
- 1.1 109 km S of McCarthy, Alaska
- 1.2 113 km S of McCarthy, Alaska
- 1.6 101 km S of McCarthy, Alaska
- 1.8 87 km S of McCarthy, Alaska
- 1.2 90 km S of McCarthy, Alaska
- 0.9 73 km S of McCarthy, Alaska
- 1.1 107 km S of McCarthy, Alaska
- 1.2 93 km S of McCarthy, 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.
Revisions
USGS refines a solution as more stations report. Every change we have seen is listed here.
| What changed | From | To | When |
|---|---|---|---|
| review status | automatic | reviewed | |
| location | 94 km S of McCarthy, Alaska | 93 km S of McCarthy, Alaska | |
| longitude | -142.58 | -142.59 | |
| latitude | 60.61 | 60.61 | |
| depth | 5 | 0.9 | |
| location | 93 km S of McCarthy, Alaska | 94 km S of McCarthy, Alaska | |
| longitude | -142.62 | -142.58 | |
| latitude | 60.61 | 60.61 | |
| depth | 1.5 | 5 | |
| magnitude | 1.7 | 1.8 | |
| location | 92 km S of McCarthy, Alaska | 93 km S of McCarthy, Alaska | |
| longitude | -142.63 | -142.62 |
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.