QuakeIndex

Earthquake · reviewed by a seismologist

M 4.1ml

Earthquake near Port Angeles, WA

No earthquake was likely felt in Port Angeles in the 24 hours to 6:19 am PST (14:19 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 4.1 earthquake was recorded 46 km (29 mi) south-southwest of Port Angeles, WA, at 3:09 am PST on 19 November 2018 (11:09 UTC), 39 km deep. 107 people have reported feeling it to USGS.

USGS: 38 km NE of Amanda Park, Washington

91 km (56 mi) W of Seattle, WA

3:09 am PST, Nov 19, 2018 · · 39 km deep · released about 20 tons of TNT

Every earthquake near Port Angeles Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Jefferson County 11 kmMason County 49 kmClallam County 51 kmKitsap County 68 kmGrays Harbor County 70 kmIsland County 82 kmSan Juan County 95 kmThurston 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
3:09 am PST on 19 November 2018 ()
Where
46 km (29 mi) south-southwest of Port Angeles, WA · earthquakes near Port Angeles
Magnitude
M 4.1 (ml)
Depth
39 km below the surface
Felt
107 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
USGS impact alert
green
Nearest
Jefferson County, 11 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 601 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

At this magnitude and depth, people at rest would likely notice it out to about 95 km (59 mi) from the epicentre. In Port Angeles, 46 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: Port Angeles 46 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 20 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 8,500× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 380× the energy of this one
  3. Magna, Utah 2020 M 5.7 270× the energy of this one
  4. This earthquake M 4.1 about 20 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 42× more

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

The largest earthquake within 50 km since 2016 was M 4.1 on 2017-02-23 — about 1 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.3 Eastern Olympic Peninsula, Washington · 43 km ENE 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 47.7113, -123.5542. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Jefferson County, WA 11 km (7 mi) N earthquakes near Jefferson County
Mason County, WA 49 km (31 mi) SE earthquakes near Mason County
Clallam County, WA 51 km (32 mi) NNW earthquakes near Clallam County
Kitsap County, WA 68 km (42 mi) E earthquakes near Kitsap County
Grays Harbor County, WA 70 km (43 mi) SSW earthquakes near Grays Harbor County
Island County, WA 82 km (51 mi) NE earthquakes near Island County

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

Aftershocks so far

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

  1. 2.1 14 km N of Hoodsport, Washington
  2. 2.0 Washington-British Columbia border region
  3. 2.5 11 km SW of Brinnon, Washington
  4. 1.7 5 km WSW of Neilton, Washington
  5. 1.6 17 km N of Amanda Park, Washington
  6. 2.6 11 km WNW of Hoodsport, Washington
  7. 2.4 11 km NE of Hoodsport, Washington
  8. 1.9 14 km NNW of Amanda Park, Washington
  9. 1.7 25 km ESE of Forks, Washington
  10. 1.7 26 km ESE of Forks, Washington
  11. 1.6 13 km N of Amanda Park, Washington
  12. 1.6 Olympic Peninsula, Washington
  13. 1.6 28 km SSW of Port Angeles, Washington
  14. 1.7 27 km NW of Hoodsport, Washington
  15. 1.5 3 km W of Hoodsport, 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.