Earthquake · reviewed by a seismologist
M 1.9ml
Earthquake near Birch Bay, WA
No earthquake was likely felt in Birch Bay in the 24 hours to 5:07 am PST (13:07 UTC). The last one was M 3.8, 71 km (44 mi) S, at 11:35 pm PDT on 1 July 2026, estimated intensity II (weak) in town; 2,030 felt reports to USGS. Every earthquake near Birch Bay
This page: a magnitude 1.9 earthquake was recorded 6 km (4 mi) south-southeast of Birch Bay, WA, at 1:52 am PDT on 21 March 2022 (08:52 UTC), 20 km deep.
USGS: 6 km SSE of Birch Bay, Washington
22 km (14 mi) NW of Bellingham, WA · 141 km (88 mi) N of Seattle, WA
- When
- 1:52 am PDT on 21 March 2022 ()
- Where
- 6 km (4 mi) south-southeast of Birch Bay, WA · earthquakes near Birch Bay
- Magnitude
- M 1.9 (ml)
- Depth
- 20 km below the surface
- Felt
- no reports yet
- Nearest
- San Juan County, 49 km SW
- Nearest mapped fault
- Birch Bay fault, 2 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 1698 days ago
Earthquake alerts for Birch Bay, 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 it was probably too small to be felt, even directly above it. In Birch Bay, 6 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: Ferndale, Marietta, Blaine, Marietta-Alderwood, Bellingham, Lynden.
How big was it?
This earthquake released about 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 790,000× the energy of this one
- Magna, Utah 2020 M 5.7 560,000× the energy of this one
- Around the size people start to feel M 3.0 50× the energy of this one
- This earthquake M 1.9 about 19 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 4 earthquakes of M5 or more within 50 km:
- 6.0 San Juan Islands, Washington · 19 km SSW of this epicentre
- 5.5 21 km SSE of Point Roberts, Washington · 22 km WSW of this epicentre
- 5.1 10 km ESE of Salt Spring Island, Canada · 47 km W of this epicentre
- 5.0 4 km ENE of Deming, Washington · 41 km E 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 48.8658, -122.7205. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Juan County, WA | 49 km (30 mi) | SW | earthquakes near San Juan County |
| Whatcom County, WA | 65 km (40 mi) | E | earthquakes near Whatcom County |
| Skagit County, WA | 78 km (49 mi) | ESE | earthquakes near Skagit County |
| Island County, WA | 79 km (49 mi) | S | earthquakes near Island County |
| Snohomish County, WA | 114 km (71 mi) | SE | earthquakes near Snohomish County |
| Clallam County, WA | 120 km (75 mi) | SW | earthquakes near Clallam County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
50 earthquakes have been recorded within 50 km since this one.
- 1.8 10 km W of Marietta, Washington
- 1.9 6 km S of Acme, Washington
- 2.0 2 km WNW of Deming, Washington
- 1.5 4 km SSW of Marietta, Washington
- 1.7 12 km WNW of Orcas, Washington
- 1.6 9 km NW of Friday Harbor, Washington
- 1.6 5 km SSW of Anacortes, Washington
- 1.9 2 km S of Marietta-Alderwood, Washington
- 2.2 2 km S of Marietta-Alderwood, Washington
- 1.6 6 km W of Edison, Washington
- 1.6 2 km SSW of Ferndale, Washington
- 1.8 2 km SSW of Ferndale, Washington
- 2.3 11 km NW of Orcas, Washington
- 1.6 4 km NE of Bellingham, Washington
- 1.7 8 km E of Ferndale, 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.