explosion · reviewed by a seismologist
M 1.5ml
Earthquake near Sumas, WA
No earthquake was likely felt in Sumas in the 24 hours to 1:09 am PST (09:09 UTC). The last one was M 2.5, 17 km (10 mi) NNE, at 12:59 pm PDT on 7 July 2025, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near Sumas
No: USGS classifies this as a explosion, not an earthquake. A magnitude 1.5 explosion was recorded in Sumas, WA, at 2:15 pm PST on 30 January 2023 (22:15 UTC), less than 1 km deep.
USGS: 0 km WNW of Sumas, Washington
31 km (19 mi) NNE of Bellingham, WA · 116 km (72 mi) N of Everett, WA
- When
- 2:15 pm PST on 30 January 2023 ()
- Where
- in Sumas, WA · earthquakes near Sumas
- Magnitude
- M 1.5 (ml)
- Depth
- -0.5 km below the surface
- Felt
- no reports yet
- Nearest
- Whatcom County, 37 km ESE
- Nearest mapped fault
- Boulder Creek-Canyon Creek fault, 15 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1382 days ago
Earthquake alerts for Sumas, WA
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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 10 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.
Earthquakes near other towns within 30 km: Nooksack, Everson, Peaceful Valley, Lynden, Ferndale.
USGS catalogues this as explosion, not an earthquake.
How big was it?
This earthquake released about 5.4 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 2,800,000× the energy of this one
- Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
- Around the size people start to feel M 3.0 180× the energy of this one
- This earthquake M 1.5 about 5.4 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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.0 4 km ENE of Deming, Washington · 20 km SSE 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 49.0038, -122.2765. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Whatcom County, WA | 37 km (23 mi) | ESE | earthquakes near Whatcom County |
| Skagit County, WA | 66 km (41 mi) | SSE | earthquakes near Skagit County |
| San Juan County, WA | 82 km (51 mi) | SW | earthquakes near San Juan County |
| Island County, WA | 98 km (61 mi) | SSW | earthquakes near Island County |
| Snohomish County, WA | 112 km (70 mi) | SSE | earthquakes near Snohomish County |
| Clallam County, WA | 155 km (96 mi) | SW | earthquakes near Clallam County |
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.
- 1.5 15 km NNE of Hamilton, Washington
- 1.8 5 km SW of Custer, Washington
- 1.7 8 km NNE of Sedro-Woolley, Washington
- 2.0 3 km S of Alger, Washington
- 1.6 7 km SSW of Chilliwack, Canada
- 2.3 3 km SE of Aldergrove East, Canada
- 1.6 15 km NNE of Lyman, Washington
- 1.5 13 km NE of Coquitlam, Canada
- 1.6 10 km N of Maple Falls, Washington
- 1.7 4 km NE of Agassiz, Canada
- 1.5 11 km E of Mission, Canada
- 1.6 10 km NE of Abbotsford, Canada
- 1.5 12 km W of Chilliwack, Canada
- 1.5 10 km E of Mission, Canada
- 2.0 10 km NNE of Hamilton, Washington
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.