QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

Earthquake near Entiat, WA

USGS: 3 km ESE of Entiat, Washington

4:49 pm PDT, Jul 26, 2018 · · 3.8 km deep · released about 17 lb of TNT

Every earthquake near Entiat Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Douglas County 36 kmChelan County 40 kmKittitas County 71 kmGrant County 73 kmOkanogan County 103 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
4:49 pm PDT on 26 July 2018 ()
Where
3 km (2 mi) ESE of Entiat, WA · earthquakes near Entiat
Magnitude
M 1.8 (ml)
Depth
3.8 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Douglas County, 36 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2946 days ago

A magnitude 1.8 earthquake was recorded 3 km (2 mi) ESE of Entiat, WA, at 4:49 pm PDT on 26 July 2018 (23:49 UTC). 1 person has 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, East Wenatchee Bench.

How big was it?

This earthquake released about 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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 47.6652, -120.1683. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Douglas County, WA 36 km (23 mi) ENE earthquakes near Douglas County
Chelan County, WA 40 km (25 mi) WNW earthquakes near Chelan County
Kittitas County, WA 71 km (44 mi) SSW earthquakes near Kittitas County
Grant County, WA 73 km (45 mi) SE earthquakes near Grant County
Okanogan County, WA 103 km (64 mi) NNE earthquakes near Okanogan County
Snohomish County, WA 127 km (79 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. 2.6 10 km WNW of Entiat, Washington
  2. 1.7 7 km W of Entiat, Washington
  3. 2.1 8 km S of Entiat, Washington
  4. 1.6 5 km NW of Waterville, Washington
  5. 1.9 4 km SW of Entiat, Washington
  6. 2.2 5 km N of Waterville, Washington
  7. 2.0 6 km NNE of Entiat, Washington
  8. 1.6 10 km NW of Entiat, Washington
  9. 2.1 3 km E of Entiat, Washington
  10. 1.6 4 km NNW of Entiat, Washington
  11. 1.6 8 km WNW of Entiat, Washington
  12. 1.7 4 km WNW of Waterville, Washington
  13. 1.7 9 km WNW of Entiat, Washington
  14. 1.5 Washington
  15. 1.9 9 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.