QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

Earthquake near Tacoma, WA

No earthquake was likely felt in Tacoma in the 24 hours to 5:25 am PST (13:25 UTC). The last one was M 4.2, 27 km (17 mi) NW, at 2:05 pm PDT on 29 September 2026, estimated intensity III (weak) in town; 9,329 felt reports to USGS. Every earthquake near Tacoma

This page: a magnitude 2.4 earthquake was recorded 39 km (24 mi) east-southeast of Tacoma, WA, at 4:56 am PDT on 24 October 2023 (11:56 UTC), 15 km deep. 2 people have reported feeling it to USGS.

USGS: 3 km E of Carbonado, Washington

66 km (41 mi) SSE of Seattle, WA · 30 km (18 mi) SSE of Auburn, WA

4:56 am PDT, Oct 24, 2023 · · 15 km deep · released about 120 lb of TNT

10 km30 km60 km120 km N Pierce County 12 kmKing County 48 kmLewis County 62 kmThurston County 65 kmKitsap County 79 kmMason County 94 kmKittitas County 100 kmSnohomish County 110 kmCowlitz County 111 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
4:56 am PDT on 24 October 2023 ()
Where
39 km (24 mi) east-southeast of Tacoma, WA · earthquakes near Tacoma
Magnitude
M 2.4 (ml)
Depth
15 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Pierce County, 12 km WSW
Nearest mapped fault
Tacoma fault, 23 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 330 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 15 km (9 mi) from the epicentre. In Tacoma, 39 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: Enumclaw 14 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 92,000× the energy of this one
  3. Around the size people start to feel M 3.0 8.2× the energy of this one
  4. This earthquake M 2.4 about 120 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:

  1. 6.7 4 km WNW of Roy, Washington · 46 km W of this epicentre
  2. 6.7 1 km ENE of Dash Point, Washington · 41 km NW of this epicentre
  3. 5.0 3 km WSW of Des Moines, Washington · 44 km NW 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 47.0765, -122.0023. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Pierce County, WA 12 km (7 mi) WSW earthquakes near Pierce County
King County, WA 48 km (30 mi) NNE earthquakes near King County
Lewis County, WA 62 km (39 mi) SSW earthquakes near Lewis County
Thurston County, WA 65 km (40 mi) WSW earthquakes near Thurston County
Kitsap County, WA 79 km (49 mi) NW earthquakes near Kitsap County
Mason County, WA 94 km (58 mi) WNW earthquakes near Mason County

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

Aftershocks so far

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

  1. 2.2 13 km NNE of Ashford, Washington
  2. 1.5 1 km SSE of Kapowsin, Washington
  3. 1.9 5 km E of Enumclaw, Washington
  4. 1.6 1 km WNW of Kapowsin, Washington
  5. 1.6 24 km NNE of Packwood, Washington
  6. 1.5 5 km WSW of Black Diamond, Washington
  7. 1.9 3 km SE of Fife, Washington
  8. 1.5 2 km ESE of Buckley, Washington
  9. 1.7 0 km WSW of Kapowsin, Washington
  10. 1.7 12 km E of Wilkeson, Washington
  11. 1.6 1 km SE of Kapowsin, Washington
  12. 1.5 15 km NNE of Ashford, Washington
  13. 2.3 0 km ESE of Waller, Washington
  14. 1.5 19 km SSE of Carbonado, Washington
  15. 1.8 17 km SE of Carbonado, 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.