explosion · reviewed by a seismologist
M 1.7ml
Earthquake near Portland, OR
No earthquake was likely felt in Portland in the 24 hours to 11:30 am PST (19:30 UTC). The last one was M 4.4, 110 km (68 mi) S, at 5:52 am PDT on 7 October 2022, estimated intensity II (weak) in town; 6,105 felt reports to USGS. Every earthquake near Portland
No: USGS classifies this as a explosion, not an earthquake. A magnitude 1.7 explosion was recorded 20 km (12 mi) southwest of Portland, OR, at 3:00 pm PST on 7 November 2022 (23:00 UTC), less than 1 km deep.
USGS: Washington-Oregon border region
22 km (14 mi) SW of Portland, OR · 7 km (4 mi) WSW of Tigard, OR
- When
- 3:00 pm PST on 7 November 2022 ()
- Where
- 20 km (12 mi) southwest of Portland, OR · earthquakes near Portland
- Magnitude
- M 1.7 (ml)
- Depth
- -0.2 km below the surface
- Felt
- no reports yet
- Nearest
- Washington County, 24 km NW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1466 days ago
Earthquake alerts for Portland, OR
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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, people at rest would likely notice it out to about 13 km (8 mi) from the epicentre. In Portland, 20 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.
Earthquakes near other towns within 30 km: King City, Sherwood, Tigard, Tualatin, Aloha, Durham.
USGS catalogues this as explosion, not an earthquake.
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 1,300,000× the energy of this one
- Magna, Utah 2020 M 5.7 930,000× the energy of this one
- Around the size people start to feel M 3.0 83× 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.
Where
Epicentre 45.4102, -122.8735. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Washington County, OR | 24 km (15 mi) | NW | earthquakes near Washington County |
| Multnomah County, OR | 39 km (24 mi) | ENE | earthquakes near Multnomah County |
| Yamhill County, OR | 39 km (24 mi) | WSW | earthquakes near Yamhill County |
| Clark County, WA | 50 km (31 mi) | NE | earthquakes near Clark County |
| Clackamas County, OR | 60 km (37 mi) | ESE | earthquakes near Clackamas County |
| Marion County, OR | 61 km (38 mi) | SSE | earthquakes near Marion County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
43 earthquakes have been recorded within 50 km since this one.
- 1.6 3 km SE of Canby, Oregon
- 1.5 8 km W of Yamhill, Oregon
- 1.6 3 km SE of Sherwood, Oregon
- 1.9 1 km WNW of Saint Paul, Oregon
- 1.6 3 km SE of Canby, Oregon
- 1.6 9 km NNE of Sheridan, Oregon
- 1.9 10 km NNE of Sheridan, Oregon
- 1.9 3 km WNW of Tigard, Oregon
- 1.7 3 km SSW of Scotts Mills, Oregon
- 1.9 5 km SSW of Aloha, Oregon
- 2.4 10 km N of Sheridan, Oregon
- 1.6 7 km ESE of Scotts Mills, Oregon
- 1.6 3 km WNW of Lafayette, Oregon
- 1.6 3 km WSW of Stafford, Oregon
- 1.8 1 km NNW of Dayton, Oregon
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.