QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Earthquake near Bellingham, WA

No earthquake was likely felt in Bellingham in the 24 hours to 5:19 am PST (13:19 UTC). The last one was M 3.8, 53 km (33 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 Bellingham

This page: a magnitude 1.5 earthquake was recorded 33 km (20 mi) southwest of Bellingham, WA, at 11:57 am PDT on 9 May 2023 (18:57 UTC), 26 km deep.

USGS: Washington

33 km (21 mi) SW of Bellingham, WA · 110 km (68 mi) NNW of Seattle, WA

11:57 am PDT, May 9, 2023 · · 26 km deep · released about 5.6 lb of TNT

10 km30 km60 km120 km N San Juan County 22 kmIsland County 46 kmSkagit County 74 kmWhatcom County 78 kmClallam County 94 kmSnohomish County 96 kmJefferson County 99 kmKitsap County 103 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
11:57 am PDT on 9 May 2023 ()
Where
33 km (20 mi) southwest of Bellingham, WA · earthquakes near Bellingham
Magnitude
M 1.5 (ml)
Depth
26 km below the surface
Felt
no reports yet
Nearest
San Juan County, 22 km WSW
Nearest mapped fault
Utsalady Point fault, 25 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 1284 days ago

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 Bellingham, 33 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: Friday Harbor, Anacortes, Ault Field.

How big was it?

This earthquake released about 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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:

  1. 6.0 San Juan Islands, Washington · 16 km N of this epicentre
  2. 5.5 21 km SSE of Point Roberts, Washington · 30 km NNW of this epicentre
  3. 5.1 10 km ESE of Salt Spring Island, Canada · 48 km NW of this epicentre
  4. 5.0 6 km W of Conway, Washington · 38 km SE 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 48.5607, -122.8138. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Juan County, WA 22 km (14 mi) WSW earthquakes near San Juan County
Island County, WA 46 km (29 mi) SSE earthquakes near Island County
Skagit County, WA 74 km (46 mi) E earthquakes near Skagit County
Whatcom County, WA 78 km (49 mi) ENE earthquakes near Whatcom County
Clallam County, WA 94 km (58 mi) WSW earthquakes near Clallam County
Snohomish County, WA 96 km (60 mi) SE earthquakes near Snohomish County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

48 earthquakes have been recorded within 50 km since this one.

  1. 1.7 5 km WSW of Mount Vernon, Washington
  2. 2.1 7 km NW of Jamestown, Washington
  3. 2.4 4 km W of Mount Vernon, Washington
  4. 1.5 8 km WNW of Orcas, Washington
  5. 2.5 4 km ENE of Oak Bay, Canada
  6. 1.9 5 km WSW of Stanwood, Washington
  7. 1.5 10 km E of Orcas, Washington
  8. 4.5 2025 Orcas Island, Washington
  9. 3.7 16 km SSE of Victoria, Canada
  10. 1.8 17 km NNW of Jamestown, Washington
  11. 1.5 11 km NNW of Orcas, Washington
  12. 1.6 5 km N of Port Townsend, Washington
  13. 2.8 10 km WSW of Friday Harbor, Washington
  14. 1.9 3 km W of Mount Vernon, Washington
  15. 2.0 9 km W of Coupeville, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.