Earthquake · reviewed by a seismologist
M 2.4ml
Earthquake near Long Beach, WA
No earthquake was likely felt in Long Beach in the 24 hours to 5:04 am PST (13:04 UTC). The last one was M 3.1, 16 km (10 mi) SSW, at 12:18 am PST on 12 November 2026, estimated intensity III (weak) in town; 1 felt report to USGS. Every earthquake near Long Beach
This page: a magnitude 2.4 earthquake was recorded 29 km (18 mi) west of Long Beach, WA, at 5:04 am PST on 7 December 2021 (13:04 UTC), 34 km deep.
USGS: 29 km W of Long Beach, Washington
- When
- 5:04 am PST on 7 December 2021 ()
- Where
- 29 km (18 mi) west of Long Beach, WA · earthquakes near Long Beach
- Magnitude
- M 2.4 (ml)
- Depth
- 34 km below the surface
- Felt
- no reports yet
- Nearest
- Pacific County, 54 km ENE
- Nearest mapped fault
- Cascadia fold and fault belt, under 1 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 1802 days ago
Earthquake alerts for Long Beach, WA
Get a notification in this browser when USGS records an earthquake near Long Beach, WA. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
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 Long Beach, 29 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.
How big was it?
This earthquake released about 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
- Magna, Utah 2020 M 5.7 92,000× the energy of this one
- Around the size people start to feel M 3.0 8.2× the energy of this one
- This earthquake M 2.4 about 120 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 46.3668, -124.4327. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Pacific County, WA | 54 km (34 mi) | ENE | earthquakes near Pacific County |
| Clatsop County, OR | 68 km (42 mi) | SE | earthquakes near Clatsop County |
| Wahkiakum County, WA | 78 km (48 mi) | E | earthquakes near Wahkiakum County |
| Grays Harbor County, WA | 95 km (59 mi) | NNE | earthquakes near Grays Harbor County |
| Tillamook County, OR | 114 km (71 mi) | SSE | earthquakes near Tillamook County |
| Columbia County, OR | 114 km (71 mi) | ESE | earthquakes near Columbia County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
8 earthquakes have been recorded within 50 km since this one.
- 3.1 11 km W of Hammond, Oregon
- 1.5 8 km NNW of Ocean Park, Washington
- 1.4 20 km SW of Grayland, Washington
- 1.8 41 km WNW of Cannon Beach, Oregon
- 2.0 69 km W of Ocean Park, Washington
- 2.1 68 km WSW of Ilwaco, Washington
- 1.8 21 km WNW of Long Beach, Washington
- 2.1 9 km SW of Tokeland, 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.