M4.2 earthquake 6 km WNW of Wauna, Washington
A magnitude 4.2 earthquake struck 6 km WNW of Wauna, Washington on Tue, Sep 29, 2026, 2:05 PM PDT (21:05 UTC), 28 km (17 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (ML, local (Richter)), light
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 2026-09-29 21:05:56 UTC
- Depth
- 27.9 km (17.3 mi), shallow
- Epicenter
- 47.400° N, 122.722° W
- Region
- Washington
- Felt reports
- 9,459
- Strongest shaking
- III, weak shaking
- PAGER alert
- Green
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 4.15 | ML, local (Richter) | Pacific Northwest Seismic Network | Preferred · Final · ±0.19081965077265 · 158 stations |
| 3.9 | Mwr, regional moment | USGS National Earthquake Information Center | Confirmed · ±0.034 · 81 stations |
| 4.0 | Mw, moment | EW | Preliminary · ±0.2 · 153 stations |
Tsunami
- Message
- Tsunami Information Statement Number 1
- Category
- Information
- Issued by
- NWS National Tsunami Warning Center Palmer AK
- Issued
- Area
- 230 miles N of Eugene, Oregon
- Preliminary magnitude
- 4.0 (Mwp)
- Note
- There is NO tsunami danger from this earthquake.
Read the bulletin at tsunami.gov
Current tsunami warnings: tsunami.gov. Warnings in force in the US also appear on our alerts pages.
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- III, weak shaking
- Peak ground acceleration
- 1.5% of gravity
- Peak ground velocity
- 0.5 cm/s
- Map
- Automatic
Did you feel it?
9,459 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking. If you felt it, tell the USGS: every report sharpens the shaking map.
Estimated impact
The USGS PAGER system estimates deaths and economic losses from the shaking and the population and buildings exposed to it.
- Alert level
- Green: little or no damage or loss of life expected
| Range | Chance |
|---|---|
| Under 1 | 90% |
| 1 to 10 | 9% |
| 10 to 100 | Under 1% |
| 100 to 1,000 | Under 1% |
| 1,000 to 10,000 | Under 1% |
| 10,000 to 100,000 | Under 1% |
| 100,000 to 10,000,000 | Under 1% |
| Range, million USD | Chance |
|---|---|
| Under 1 | 90% |
| 1 to 10 | 9% |
| 10 to 100 | Under 1% |
| 100 to 1,000 | Under 1% |
| 1,000 to 10,000 | Under 1% |
| 10,000 to 100,000 | Under 1% |
| 100,000 to 10,000,000 | Under 1% |
Aftershock forecast
The chance of at least one aftershock this large or larger, from the USGS operational aftershock forecast, issued Wed, Sep 30, 2026, 9:05 PM UTC. The USGS updates it as the sequence unfolds.
| Within | M3+ | M4+ | M5+ | M6+ | M7+ |
|---|---|---|---|---|---|
| 1 day | 8% | Under 1% | Under 1% | Under 1% | Under 1% |
| 1 week | 21% | 3% | Under 1% | Under 1% | Under 1% |
| 1 month | 32% | 5% | Under 1% | Under 1% | Under 1% |
| 1 year | 48% | 11% | 1% | Under 1% | Under 1% |
In the coming week the USGS expects about 0 aftershocks of magnitude 3 or more, and most likely between 0 and 2.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Strike-slip
- Moment magnitude
- 3.9 Mwr
- Nodal plane 1
- Strike 100°, dip 70°, rake 7°
- Nodal plane 2
- Strike 7°, dip 83°, rake 159°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 0.2 km horizontally, 0.4 km in depth
- Magnitude uncertainty
- ±0.19
- Depth from
- From location
- Station coverage gap
- 22°
- Stations used
- 180
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 since this one and 11 in the 30 days before it.
After
- 1.96 km WNW of Wauna, Washington · 42 hr ago · 32 km deep · 1 km away · felt by 3
- 1.65 km W of Burley, Washington · 30 hr ago · 27 km deep · 2 km away
Before
- 1.60 km NE of Wilderness Rim, Washington · 3 days ago · 22 km deep · 72 km away
- 1.70 km W of Lake Stickney, Washington · 8 days ago · 23 km deep · 63 km away
- 2.13 km NNW of Kapowsin, Washington · 9 days ago · 1 km deep · 56 km away · felt by 1
- 2.110 km ENE of Fall City, Washington · 9 days ago · 16 km deep · 76 km away · felt by 1
- 2.45 km SW of Wilderness Rim, Washington · 10 days ago · 19 km deep · 68 km away · felt by 10
- 2.03 km ESE of East Renton Highlands, Washington · 11 days ago · 14 km deep · 50 km away
- 2.16 km ENE of Bell Hill, Washington · 13 days ago · 49 km deep · 79 km away
- 1.511 km NE of Ashford, Washington · 14 days ago · 5 km deep · 87 km away
- 2.14 km SW of Wilderness Rim, Washington · 16 days ago · 21 km deep · 69 km away · felt by 2
- 1.710 km ESE of Riverbend, Washington · 22 days ago · 13 km deep · 83 km away
- 2.14 km NNE of Snoqualmie, Washington · 29 days ago · 18 km deep · 72 km away · felt by 3
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw714111952 (also filed as ew1790715960, us6000tyf3). Read Thu, Oct 1, 2026, 8:54 PM UTC.