QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

2 km NW of Chico, Washington

· 17 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kitsap County 6 kmMason County 45 kmIsland County 59 kmJefferson County 63 kmKing County 69 kmPierce County 77 kmThurston County 77 kmSnohomish County 86 kmGrays Harbor County 101 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 1.9 (ml)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Kitsap County, 6 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1213 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 47.6260, -122.7262. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kitsap County, WA 6 km (4 mi) WSW of here earthquakes near Kitsap County
Mason County, WA 45 km (28 mi) NE of here earthquakes near Mason County
Island County, WA 59 km (37 mi) S of here earthquakes near Island County
Jefferson County, WA 63 km (39 mi) ESE of here earthquakes near Jefferson County
King County, WA 69 km (43 mi) WNW of here earthquakes near King County
Pierce County, WA 77 km (48 mi) NW of here earthquakes near Pierce County

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

Aftershocks so far

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

  1. 1.8 7 km SSE of Seabeck, Washington
  2. 1.6 3 km NW of Gorst, Washington
  3. 1.6 4 km NW of Belfair, Washington
  4. 2.7 5 km NW of Indianola, Washington
  5. 1.8 4 km SW of Port Ludlow, Washington
  6. 2.1 3 km NNE of White Center, Washington
  7. 1.5 11 km N of Quilcene, Washington
  8. 2.2 3 km NE of Belfair, Washington
  9. 1.8 5 km SE of Quilcene, Washington
  10. 1.7 3 km NNW of Suquamish, Washington
  11. 1.8 4 km SSW of Port Ludlow, Washington
  12. 1.8 2 km N of Keyport, Washington
  13. 3.4 17 km WSW of Brinnon, Washington
  14. 1.7 0 km S of Belfair, Washington
  15. 2.0 1 km SSE of Dash Point, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.1 on 2017-02-23 — it released about 1,900 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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