QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5ml

Earthquake near Port Angeles, WA

No earthquake was likely felt in Port Angeles in the 24 hours to 6:27 am PST (14:27 UTC). The last one was M 4.2, 96 km (60 mi) SE, at 2:05 pm PDT on 29 September 2026, estimated intensity II (weak) in town; 9,329 felt reports to USGS. Every earthquake near Port Angeles

This page: a magnitude 2.5 earthquake was recorded 15 km (9 mi) north of Port Angeles, WA, at 3:16 am PDT on 28 June 2020 (10:16 UTC), 18 km deep. 9 people have reported feeling it to USGS.

USGS: Washington-British Columbia border region

3:16 am PDT, Jun 28, 2020 · · 18 km deep · released about 150 lb of TNT

10 km30 km60 km120 km N Clallam County 37 kmSan Juan County 37 kmJefferson County 50 kmIsland County 58 kmKitsap County 90 kmMason County 102 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
3:16 am PDT on 28 June 2020 ()
Where
15 km (9 mi) north of Port Angeles, WA · earthquakes near Port Angeles
Magnitude
M 2.5 (ml)
Depth
18 km below the surface
Felt
9 reports · strongest reported intensity III
Nearest
Clallam County, 37 km WSW
Nearest mapped fault
Southern Whidbey Island fault, 16 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 2260 days ago

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 13 km (8 mi) from the epicentre. In Port Angeles, 15 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: Port Angeles East.

How big was it?

This earthquake released about 150 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 99,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 70,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.2× the energy of this one
  4. This earthquake M 2.5 about 150 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.

Where

Epicentre 48.2545, -123.4365. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Clallam County, WA 37 km (23 mi) WSW earthquakes near Clallam County
San Juan County, WA 37 km (23 mi) NE earthquakes near San Juan County
Jefferson County, WA 50 km (31 mi) S earthquakes near Jefferson County
Island County, WA 58 km (36 mi) E earthquakes near Island County
Kitsap County, WA 90 km (56 mi) SE earthquakes near Kitsap County
Mason County, WA 102 km (64 mi) S earthquakes near Mason County

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

Aftershocks so far

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

  1. 1.6 5 km N of Oak Bay, Canada
  2. 2.3 5 km NNE of Oak Bay, Canada
  3. 1.5 18 km NNW of Sooke, Canada
  4. 1.6 8 km NE of Oak Bay, Canada
  5. 1.6 11 km E of North Saanich, Canada
  6. 1.7 9 km NW of Langford, Canada
  7. 1.6 8 km NNW of Jamestown, Washington
  8. 1.6 28 km SSW of Port Angeles, Washington
  9. 1.5 16 km NE of Jamestown, Washington
  10. 1.7 2 km N of Metchosin, Canada
  11. 2.6 24 km SSW of River Road, Washington
  12. 2.0 6 km W of Orcas, Washington
  13. 1.5 8 km ESE of Blyn, Washington
  14. 1.6 5 km NNW of Victoria, Canada
  15. 1.8 9 km WSW of Friday Harbor, 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.