Earthquake · reviewed by a seismologist
M 1.7ml
Earthquake near Carson, WA
USGS: 14 km NW of Carson, Washington
64 km (40 mi) ENE of Portland, OR · 53 km (33 mi) NE of Gresham, OR
- When
- 2:01 pm PST on 4 February 2018 ()
- Where
- 14 km (9 mi) NW of Carson, WA · earthquakes near Carson
- Magnitude
- M 1.7 (ml)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- Skamania County, 22 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3161 days ago
A magnitude 1.7 earthquake was recorded 14 km (9 mi) NW of Carson, WA, at 2:01 pm PST on 4 February 2018 (22:01 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: Stevenson, Cascade Locks.
How big was it?
This earthquake released about 11 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.
- Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
- Magna, Utah 2020 M 5.7 970,000× the energy of this one
- Around the size people start to feel M 3.0 86× the energy of this one
- This earthquake M 1.7 about 11 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 14 earthquakes of M5 or more within 50 km; the five largest:
- 5.7 38 km NNE of Amboy, Washington · 47 km NNW of this epicentre
- 5.2 37 km NNE of Amboy, Washington · 47 km NNW of this epicentre
- 5.1 28 km ENE of Amboy, Washington · 26 km NNW of this epicentre
- 5.1 Washington · 48 km NNW of this epicentre
- 5.1 38 km NNE of Amboy, Washington · 47 km NNW 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 45.8260, -121.9353. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Skamania County, WA | 22 km (14 mi) | N | earthquakes near Skamania County |
| Hood River County, OR | 41 km (26 mi) | SSE | earthquakes near Hood River County |
| Clark County, WA | 43 km (27 mi) | W | earthquakes near Clark County |
| Multnomah County, OR | 49 km (30 mi) | SW | earthquakes near Multnomah County |
| Cowlitz County, WA | 71 km (44 mi) | NW | earthquakes near Cowlitz County |
| Clackamas County, OR | 77 km (48 mi) | SSW | earthquakes near Clackamas 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.
- 1.7 2 km SSW of Odell, Oregon
- 1.5 4 km NNW of North Bonneville, Washington
- 1.7 16 km NNE of Amboy, Washington
- 2.4 8 km NW of Parkdale, Oregon
- 1.7 3 km SSW of Yacolt, Washington
- 1.5 5 km ENE of Lewisville, Washington
- 1.7 4 km N of Mount Hood, Oregon
- 1.6 5 km E of Lewisville, Washington
- 2.3 14 km ENE of Yacolt, Washington
- 1.5 3 km E of Lewisville, Washington
- 1.7 14 km NNW of Carson, Washington
- 3.5 0 km SE of Parkdale, Oregon
- 1.9 23 km NE of Amboy, Washington
- 2.2 37 km SSE of Morton, Washington
- 1.7 20 km N of Amboy, 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
- 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.