Earthquake · reviewed by a seismologist
M 2.1ml
Earthquake near Snoqualmie, WA
No earthquake was likely felt in Snoqualmie in the 24 hours to 11:45 pm PST (07:45 UTC). The last one was M 2.6, 12 km (8 mi) S, at 6:09 pm PDT on 14 October 2026, estimated intensity II (weak) in town; 46 felt reports to USGS. Every earthquake near Snoqualmie
This page: a magnitude 2.1 earthquake was recorded 4 km (3 mi) north-northeast of Snoqualmie, WA, at 8:59 pm PDT on 2 September 2026 (03:59 UTC), 18 km deep. 3 people have reported feeling it to USGS.
USGS: 4 km NNE of Snoqualmie, Washington
42 km (26 mi) E of Seattle, WA · 18 km (11 mi) E of Sammamish, WA
- When
- 8:59 pm PDT on 2 September 2026 ()
- Where
- 4 km (3 mi) north-northeast of Snoqualmie, WA · earthquakes near Snoqualmie
- Magnitude
- M 2.1 (ml)
- Depth
- 18 km below the surface
- Felt
- 3 reports · strongest reported intensity II
- Nearest
- King County, 8 km SSW
- Nearest mapped fault
- Rattlesnake Mountain fault, 4 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 49 days ago
Earthquake alerts for Snoqualmie, 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 2 km (1 mi) from the epicentre. In Snoqualmie, 4 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.
Earthquakes near other towns within 30 km: Fall City, North Bend, Tanner, Riverbend, Carnation, Wilderness Rim.
How big was it?
This earthquake released about 49 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 310,000× the energy of this one
- Magna, Utah 2020 M 5.7 220,000× the energy of this one
- Around the size people start to feel M 3.0 19× the energy of this one
- This earthquake M 2.1 about 49 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 4.6 on 2019-07-12 — about 4,600 times the energy of this one.
Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:
- 5.4 8 km NNE of Lake Marcel-Stillwater, Washington · 23 km NNW of this epicentre
- 5.2 9 km NE of Lake Marcel-Stillwater, Washington · 21 km N of this epicentre
- 5.0 3 km WSW of Des Moines, Washington · 47 km WSW 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 47.5625, -121.7968. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| King County, WA | 8 km (5 mi) | SSW | earthquakes near King County |
| Snohomish County, WA | 55 km (34 mi) | N | earthquakes near Snohomish County |
| Pierce County, WA | 63 km (39 mi) | SSW | earthquakes near Pierce County |
| Kitsap County, WA | 65 km (40 mi) | W | earthquakes near Kitsap County |
| Island County, WA | 93 km (58 mi) | NW | earthquakes near Island County |
| Chelan County, WA | 94 km (59 mi) | ENE | earthquakes near Chelan 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.
- 1.3 2 km N of Union Hill-Novelty Hill, Washington
- 1.5 6 km ESE of Lake Marcel-Stillwater, Washington
- 2.0 18 km ENE of Tanner, Washington
- 1.6 13 km ESE of Enumclaw, Washington
- 1.5 12 km NNE of Snoqualmie, Washington
- 0.6 7 km ESE of Carnation, Washington
- 1.1 10 km E of Carnation, Washington
- 1.1 2 km NNW of Mirrormont, Washington
- 1.0 0 km ESE of Snoqualmie, Washington
- 1.0 10 km NE of Snoqualmie, Washington
- 1.6 5 km S of Lake Morton-Berrydale, Washington
- 1.6 11 km NE of Snoqualmie, Washington
- 0.9 7 km E of Hobart, Washington
- 1.2 2 km ENE of May Creek, Washington
- 1.0 1 km E of Ames Lake, 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.