Earthquake · reviewed by a seismologist
M 2.2ml
Earthquake near Burlington, WA
No earthquake was likely felt in Burlington in the 24 hours to 8:46 pm PST (04:46 UTC). The last one was M 2.6, 6 km (4 mi) SSE, at 9:17 pm PDT on 11 September 2026, estimated intensity II (weak) in town; 10 felt reports to USGS. Every earthquake near Burlington
This page: a magnitude 2.2 earthquake was recorded 3 km (2 mi) east-southeast of Burlington, WA, at 9:40 pm PDT on 28 August 2021 (04:40 UTC), 12 km deep. 2 people have reported feeling it to USGS.
USGS: 3 km ESE of Burlington, Washington
94 km (58 mi) N of Seattle, WA · 35 km (22 mi) SSE of Bellingham, WA
- When
- 9:40 pm PDT on 28 August 2021 ()
- Where
- 3 km (2 mi) east-southeast of Burlington, WA · earthquakes near Burlington
- Magnitude
- M 2.2 (ml)
- Depth
- 12 km below the surface
- Felt
- 2 reports · strongest reported intensity II
- Nearest
- Skagit County, 35 km E
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1832 days ago
Earthquake alerts for Burlington, WA
Get a notification in this browser when USGS records an earthquake near Burlington, 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 14 km (9 mi) from the epicentre. In Burlington, 3 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.
Likely felt in: Mount Vernon 6 km, intensity II · Sedro-Woolley 6 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 69 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 220,000× the energy of this one
- Magna, Utah 2020 M 5.7 150,000× the energy of this one
- Around the size people start to feel M 3.0 14× the energy of this one
- This earthquake M 2.2 about 69 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 3 earthquakes of M5 or more within 50 km:
- 6.0 San Juan Islands, Washington · 46 km NW of this epicentre
- 5.0 6 km W of Conway, Washington · 18 km SW of this epicentre
- 5.0 4 km ENE of Deming, Washington · 44 km NNE 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 48.4623, -122.2872. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Skagit County, WA | 35 km (22 mi) | E | earthquakes near Skagit County |
| Island County, WA | 44 km (27 mi) | SW | earthquakes near Island County |
| Whatcom County, WA | 54 km (33 mi) | NE | earthquakes near Whatcom County |
| Snohomish County, WA | 60 km (37 mi) | SE | earthquakes near Snohomish County |
| San Juan County, WA | 60 km (38 mi) | W | earthquakes near San Juan County |
| Kitsap County, WA | 95 km (59 mi) | SSW | earthquakes near Kitsap 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.
- 1.7 Washington
- 1.6 4 km NE of Granite Falls, Washington
- 2.1 Washington
- 1.5 Washington
- 2.2 8 km NE of Marietta-Alderwood, Washington
- 1.6 7 km WSW of Coupeville, Washington
- 2.3 6 km NW of Sedro-Woolley, Washington
- 1.7 6 km NW of Sedro-Woolley, Washington
- 2.6 3 km NNW of Sedro-Woolley, Washington
- 1.7 13 km S of Concrete, Washington
- 2.0 7 km ENE of Oso, Washington
- 1.5 5 km ENE of Oso, Washington
- 2.0 5 km E of Deming, Washington
- 1.5 16 km SSE of Glacier, Washington
- 3.0 5 km ENE of Oso, 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.