Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near City of Sammamish, WA
No earthquake was likely felt in City of Sammamish in the 24 hours to 5:47 am PST (13:47 UTC). The last one was M 4.2, 56 km (35 mi) WSW, at 2:05 pm PDT on 29 September 2026, estimated intensity II (weak) in town; 9,329 felt reports to USGS. Every earthquake near City of Sammamish
This page: a magnitude 1.6 earthquake was recorded 46 km (29 mi) east of City of Sammamish, WA, at 9:05 am PDT on 12 May 2024 (16:05 UTC), 9.6 km deep.
USGS: 14 km N of Snoqualmie Pass, Washington
70 km (43 mi) E of Seattle, WA · 46 km (29 mi) E of Sammamish, WA
- When
- 9:05 am PDT on 12 May 2024 ()
- Where
- 46 km (29 mi) east of City of Sammamish, WA · earthquakes near City of Sammamish
- Magnitude
- M 1.6 (ml)
- Depth
- 9.6 km below the surface
- Felt
- no reports yet
- Nearest
- King County, 31 km W
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 913 days ago
Earthquake alerts for City of Sammamish, WA
Get a notification in this browser when USGS records an earthquake near City of Sammamish, 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 6 km (4 mi) from the epicentre. In City of Sammamish, 46 km away, the estimate is intensity I (not felt). 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: Tanner, Riverbend, Wilderness Rim, North Bend, Snoqualmie.
How big was it?
This earthquake released about 7.8 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
- Around the size people start to feel M 3.0 120× the energy of this one
- This earthquake M 1.6 about 7.8 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 2 earthquakes of M5 or more within 50 km:
- 5.4 8 km NNE of Lake Marcel-Stillwater, Washington · 43 km NW of this epicentre
- 5.2 9 km NE of Lake Marcel-Stillwater, Washington · 39 km NW 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 47.5242, -121.4298. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| King County, WA | 31 km (19 mi) | W | earthquakes near King County |
| Snohomish County, WA | 64 km (40 mi) | NNW | earthquakes near Snohomish County |
| Chelan County, WA | 71 km (44 mi) | ENE | earthquakes near Chelan County |
| Kittitas County, WA | 72 km (45 mi) | SE | earthquakes near Kittitas County |
| Pierce County, WA | 76 km (47 mi) | SW | earthquakes near Pierce County |
| Kitsap County, WA | 92 km (57 mi) | W | earthquakes near Kitsap County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
44 earthquakes have been recorded within 50 km since this one.
- 1.6 9 km ENE of Snoqualmie, Washington
- 2.1 10 km NNE of Snoqualmie, Washington
- 2.8 3 km NE of Fall City, Washington
- 2.3 7 km NE of Snoqualmie, Washington
- 2.2 2 km SSE of Lake Marcel-Stillwater, Washington
- 1.6 4 km WSW of Wilderness Rim, Washington
- 1.9 7 km S of Woods Creek, Washington
- 1.7 7 km NNE of May Creek, Washington
- 1.7 17 km W of Leavenworth, Washington
- 1.6 12 km E of Greenwater, Washington
- 1.8 8 km NE of Fall City, Washington
- 1.7 11 km E of Greenwater, Washington
- 2.4 10 km NNE of Snoqualmie, Washington
- 1.7 9 km ENE of Snoqualmie, Washington
- 3.7 12 km E of Greenwater, 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.