QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Earthquake near Tanner, WA

No earthquake was likely felt in Tanner in the 24 hours to 8:49 pm PST (04:49 UTC). The last one was M 2.6, 9 km (6 mi) SW, at 6:09 pm PDT on 14 October 2026, estimated intensity II (weak) in town; 46 felt reports to USGS. Every earthquake near Tanner

This page: a magnitude 1.7 earthquake was recorded 3 km (2 mi) northeast of Tanner, WA, at 9:54 pm PST on 10 November 2017 (05:54 UTC), 17 km deep.

USGS: 3 km NE of Tanner, Washington

49 km (31 mi) ESE of Seattle, WA · 26 km (16 mi) ESE of Sammamish, WA

9:54 pm PST, Nov 10, 2017 · · 17 km deep · released about 10 lb of TNT

Every earthquake near Tanner Felt it? Tell USGS Check my area
10 km30 km60 km120 km N King County 9 kmPierce County 59 kmSnohomish County 62 kmKitsap County 72 kmKittitas County 89 kmChelan County 92 kmIsland County 102 kmThurston County 105 kmMason 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
9:54 pm PST on 10 November 2017 ()
Where
3 km (2 mi) northeast of Tanner, WA · earthquakes near Tanner
Magnitude
M 1.7 (ml)
Depth
17 km below the surface
Felt
no reports yet
Nearest
King County, 9 km W
Nearest mapped fault
Rattlesnake Mountain fault, 6 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 3287 days ago

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

At this magnitude and depth it was probably too small to be felt, even directly above it. In Tanner, 3 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: Riverbend, North Bend, Wilderness Rim, Snoqualmie, Fall City, Hobart.

How big was it?

This earthquake released about 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 95× the energy of this one
  4. This earthquake M 1.7 about 10 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. 5.4 8 km NNE of Lake Marcel-Stillwater, Washington · 32 km NNW of this epicentre
  2. 5.2 9 km NE of Lake Marcel-Stillwater, Washington · 29 km NNW of this epicentre
  3. 5.0 3 km WSW of Des Moines, Washington · 50 km WSW 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 47.4967, -121.7198. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
King County, WA 9 km (5 mi) W earthquakes near King County
Pierce County, WA 59 km (37 mi) SSW earthquakes near Pierce County
Snohomish County, WA 62 km (39 mi) N earthquakes near Snohomish County
Kitsap County, WA 72 km (44 mi) WNW earthquakes near Kitsap County
Kittitas County, WA 89 km (55 mi) ESE earthquakes near Kittitas County
Chelan County, WA 92 km (57 mi) ENE earthquakes near Chelan County

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

Aftershocks so far

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

  1. 1.9 1 km NE of Tanner, Washington
  2. 1.7 9 km SE of Enumclaw, Washington
  3. 1.6 10 km ESE of Enumclaw, Washington
  4. 1.9 11 km ESE of Enumclaw, Washington
  5. 1.6 4 km WSW of Monroe, Washington
  6. 1.6 13 km S of Snoqualmie Pass, Washington
  7. 2.0 4 km SSW of Roosevelt, Washington
  8. 1.6 11 km W of Greenwater, Washington
  9. 1.7 8 km SSW of Wilderness Rim, Washington
  10. 2.6 8 km SSW of Wilderness Rim, Washington
  11. 2.0 10 km ENE of Fall City, Washington
  12. 1.8 13 km ESE of Enumclaw, Washington
  13. 1.5 0 km NNE of Lake Marcel-Stillwater, Washington
  14. 1.6 Washington
  15. 2.2 0 km S of Union Hill-Novelty Hill, 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.