Earthquake · reviewed by a seismologist
M 3.6mwr
22 km NNE of Ganges, Canada
Yes. A magnitude 3.6 earthquake was recorded 22 km NNE of Ganges, Canada, at 2:08 am PDT on 4 October 2024 (09:08 UTC), 61 km deep. 1,364 people have reported feeling it to USGS.
- When
- Magnitude
- M 3.6 (mwr)
- Depth
- 61 km below the surface
- Felt
- 1,364 reports · strongest reported intensity IV
- Measured shaking
- intensity IV (ShakeMap)
- Nearest
- San Juan County, 64 km SSE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 629 days ago
Earthquake alerts for Point Roberts, WA
Get a notification in this browser when USGS records an earthquake near Point Roberts, 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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 33 km (21 mi) from the epicentre. 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.
Earthquakes near other towns within 30 km: Point Roberts.
How big was it?
This earthquake released about 3.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 45,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 2,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,400× the energy of this one
- This earthquake M 3.6 about 3.8 tons of TNT
- Around the size people start to feel M 3.0 this one released 7.9× more
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.
Where
Epicentre 49.0484, -123.4017. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Juan County, WA | 64 km (40 mi) | SSE | earthquakes near San Juan County |
| Clallam County, WA | 110 km (69 mi) | SSW | earthquakes near Clallam County |
| Island County, WA | 113 km (70 mi) | SSE | earthquakes near Island County |
| Whatcom County, WA | 117 km (72 mi) | E | earthquakes near Whatcom County |
| Skagit County, WA | 132 km (82 mi) | ESE | earthquakes near Skagit County |
| Snohomish County, WA | 163 km (102 mi) | SE | earthquakes near Snohomish County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
21 earthquakes have been recorded within 50 km since this one.
- 0.7 3 km N of North Saanich, Canada
- 1.8 3 km WNW of Ladysmith, Canada
- 1.9 10 km S of Cowichan Bay, Canada
- 2.2 9 km SW of White Rock, Canada
- 1.8 7 km SE of Sechelt, Canada
- 1.9 10 km ESE of Salt Spring Island, Canada
- 1.6 10 km NW of Ganges, Canada
- 1.8 9 km WNW of White Rock, Canada
- 2.7 10 km SE of Salt Spring Island, Canada
- 1.8 10 km S of Point Roberts, Washington
- 2.1 8 km SW of Duncan, Canada
- 2.0 1 km SSW of North Saanich, Canada
- 1.7 6 km E of North Saanich, Canada
- 2.3 8 km NNW of Bowen Island, Canada
- 1.5 11 km NNW of Orcas, 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.