Earthquake · reviewed by a seismologist
M 1.7ml
61 km SSW of Princeton, Canada
Yes. A magnitude 1.7 earthquake was recorded 61 km SSW of Princeton, Canada, at 1:24 am PDT on 15 September 2023 (08:24 UTC), 9.0 km deep.
- When
- Magnitude
- M 1.7 (ml)
- Depth
- 9.0 km below the surface
- Felt
- no reports yet
- Nearest
- Whatcom County, 78 km W
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1155 days ago
Earthquake alerts for Darrington, WA
Get a notification in this browser when USGS records an earthquake near Darrington, WA. 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 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 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
- Magna, Utah 2020 M 5.7 870,000× the energy of this one
- Around the size people start to feel M 3.0 78× the energy of this one
- This earthquake M 1.7 about 12 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.
Where
Epicentre 48.9362, -120.7745. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Whatcom County, WA | 78 km (49 mi) | W | earthquakes near Whatcom County |
| Okanogan County, WA | 87 km (54 mi) | ESE | earthquakes near Okanogan County |
| Skagit County, WA | 91 km (56 mi) | WSW | earthquakes near Skagit County |
| Chelan County, WA | 120 km (75 mi) | S | earthquakes near Chelan County |
| Snohomish County, WA | 122 km (76 mi) | SW | earthquakes near Snohomish County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
32 earthquakes have been recorded within 50 km since this one.
- 1.9 14 km S of Princeton, Canada
- 2.0 17 km S of Princeton, Canada
- 1.7 14 km S of Princeton, Canada
- 1.8 19 km SSE of Princeton, Canada
- 2.0 16 km S of Princeton, Canada
- 1.9 32 km WSW of Princeton, Canada
- 2.2 17 km S of Princeton, Canada
- 2.0 13 km S of Princeton, Canada
- 1.9 18 km S of Princeton, Canada
- 1.8 20 km SSE of Princeton, Canada
- 2.0 13 km S of Princeton, Canada
- 1.6 49 km SE of Hope, Canada
- 2.1 16 km S of Princeton, Canada
- 1.7 45 km NW of Winthrop, Washington
- 1.8 15 km S of Princeton, Canada
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.