quarry blast · reviewed by a seismologist
M 1.9ml
Earthquake near Spokane, WA
USGS: 9 km NW of Rockford Bay, Idaho
36 km (22 mi) ESE of Spokane, WA · 21 km (13 mi) SW of Coeur d'Alene, ID
- When
- 1:43 pm PST on 3 February 2017 ()
- Where
- 36 km (22 mi) ESE of Spokane, WA · earthquakes near Spokane
- Magnitude
- M 1.9 (ml)
- Depth
- -0.5 km below the surface
- Felt
- no reports yet
- Nearest
- Kootenai County, 24 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3528 days ago
A magnitude 1.9 earthquake was recorded 36 km (22 mi) ESE of Spokane, WA, at 1:43 pm PST on 3 February 2017 (21:43 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: Liberty Lake, Post Falls, Otis Orchards-East Farms, Coeur d'Alene, Spokane Valley, Dalton Gardens.
USGS catalogues this as quarry blast, not an earthquake.
How big was it?
This earthquake released about 19 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.
- Mineral, Virginia 2011 M 5.8 810,000× the energy of this one
- Magna, Utah 2020 M 5.7 580,000× the energy of this one
- Around the size people start to feel M 3.0 51× the energy of this one
- This earthquake M 1.9 about 19 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 47.5637, -116.9752. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Kootenai County, ID | 24 km (15 mi) | ENE | earthquakes near Kootenai County |
| Spokane County, WA | 33 km (20 mi) | WNW | earthquakes near Spokane County |
| Benewah County, ID | 46 km (29 mi) | SE | earthquakes near Benewah County |
| Whitman County, WA | 84 km (52 mi) | SSW | earthquakes near Whitman County |
| Latah County, ID | 85 km (53 mi) | SSE | earthquakes near Latah County |
| Shoshone County, ID | 85 km (53 mi) | ESE | earthquakes near Shoshone County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
52 earthquakes have been recorded within 50 km since this one.
- 1.9 2 km NE of Fairwood, Washington
- 2.1 4 km NW of Rockford Bay, Idaho
- 2.2 2 km NW of Mead, Washington
- 1.8 7 km SSW of Tekoa, Washington
- 1.8 6 km SSW of Athol, Idaho
- 1.6 7 km SSE of Saint Maries, Idaho
- 1.7 6 km SE of Spangle, Washington
- 1.6 3 km ESE of Veradale, Washington
- 1.7 4 km SSW of Liberty Lake, Washington
- 1.6 13 km SSE of Liberty Lake, Washington
- 2.0 3 km N of Harrison, Idaho
- 1.8 2 km NNE of Fairwood, Washington
- 2.3 2 km NNE of Fairwood, Washington
- 2.1 10 km SSW of Saint Maries, Idaho
- 1.9 4 km SSE of Saint Maries, Idaho
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
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.