QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

Earthquake near Entiat, WA

USGS: 1 km E of Entiat, Washington

8:29 pm PDT, Jul 9, 2016 · · 4.0 km deep · released about 46 lb of TNT

Every earthquake near Entiat Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Chelan County 38 kmDouglas County 38 kmKittitas County 72 kmGrant County 75 kmOkanogan 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
8:29 pm PDT on 9 July 2016 ()
Where
in Entiat, WA · earthquakes near Entiat
Magnitude
M 2.1 (ml)
Depth
4.0 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Chelan County, 38 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1522 days ago

A magnitude 2.1 earthquake was recorded in Entiat, WA, at 8:29 pm PDT on 9 July 2016 (03:29 UTC). 3 people have reported feeling it to USGS. This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Waterville, Chelan, Manson, Sunnyslope, Cashmere, West Wenatchee.

How big was it?

This earthquake released about 46 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 5.8 330,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 since 1900 lists no earthquake of M5 or more within 50 km.

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 47.6782, -120.1918. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Chelan County, WA 38 km (24 mi) WNW earthquakes near Chelan County
Douglas County, WA 38 km (24 mi) E earthquakes near Douglas County
Kittitas County, WA 72 km (44 mi) SSW earthquakes near Kittitas County
Grant County, WA 75 km (47 mi) SE earthquakes near Grant County
Okanogan County, WA 102 km (64 mi) NNE earthquakes near Okanogan County
Snohomish County, WA 125 km (77 mi) WNW earthquakes near Snohomish County

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

Aftershocks so far

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

  1. 1.6 5 km SW of Chelan Falls, Washington
  2. 1.7 6 km NNE of Waterville, Washington
  3. 2.1 12 km NE of Sunnyslope, Washington
  4. 2.8 12 km NE of Sunnyslope, Washington
  5. 2.2 2 km N of Waterville, Washington
  6. 1.8 6 km N of Entiat, Washington
  7. 1.7 10 km NW of Quincy, Washington
  8. 1.5 2 km SE of Entiat, Washington
  9. 1.7 8 km WSW of Chelan Falls, Washington
  10. 1.6 5 km ENE of Entiat, Washington
  11. 2.4 7 km SW of Chelan Falls, Washington
  12. 1.7 3 km N of Waterville, Washington
  13. 1.6 6 km ENE of Entiat, Washington
  14. 2.9 10 km WNW of Entiat, Washington
  15. 2.3 10 km NW of Entiat, 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.