QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

19 km NE of Packwood, Washington

Yes. A magnitude 2.1 earthquake was recorded 19 km NE of Packwood, Washington, at 3:37 pm PST on 10 February 2024 (23:37 UTC), 4.3 km deep.

· 4.3 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pierce County 59 kmYakima County 68 kmLewis County 68 kmKittitas County 77 kmKing County 86 kmSkamania County 87 kmThurston County 102 kmCowlitz County 108 kmKlickitat County 113 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
Magnitude
M 2.1 (ml)
Depth
4.3 km below the surface
Felt
no reports yet
Nearest
Pierce County, 59 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 974 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 16 km (10 mi) from the epicentre. 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.

How big was it?

This earthquake released about 37 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 one earthquake of M5 or more within 50 km:

  1. 5.0 23 km ESE of Packwood, Washington · 26 km SSE 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 46.7457, -121.5178. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Pierce County, WA 59 km (37 mi) NW earthquakes near Pierce County
Yakima County, WA 68 km (42 mi) ESE earthquakes near Yakima County
Lewis County, WA 68 km (42 mi) WSW earthquakes near Lewis County
Kittitas County, WA 77 km (48 mi) ENE earthquakes near Kittitas County
King County, WA 86 km (54 mi) NNW earthquakes near King County
Skamania County, WA 87 km (54 mi) SSW earthquakes near Skamania 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. 2.4 22 km ENE of Ashford, Washington
  2. 1.7 23 km ENE of Ashford, Washington
  3. 2.0 22 km ENE of Ashford, Washington
  4. 1.6 23 km ENE of Ashford, Washington
  5. 1.7 17 km NE of Ashford, Washington
  6. 2.3 23 km ENE of Ashford, Washington
  7. 1.6 23 km ENE of Ashford, Washington
  8. 1.6 22 km ENE of Ashford, Washington
  9. 2.3 22 km ENE of Ashford, Washington
  10. 1.6 22 km ENE of Ashford, Washington
  11. 1.6 22 km ENE of Ashford, Washington
  12. 1.5 23 km ENE of Ashford, Washington
  13. 1.6 23 km ENE of Ashford, Washington
  14. 2.0 23 km NNE of Packwood, Washington
  15. 1.6 12 km E of Greenwater, 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.