explosion · reviewed by a seismologist
M 2.1ml
Earthquake near Saint Maries, ID
No earthquake was likely felt in Saint Maries in the 24 hours to 12:04 am PST (08:04 UTC). The last one was M 1.6, 8 km (5 mi) SSE, at 10:53 am PDT on 20 April 2026, estimated intensity II (weak) in town. Every earthquake near Saint Maries
No: USGS classifies this as a explosion, not an earthquake. A magnitude 2.1 explosion was recorded 4 km (2 mi) north-northwest of Saint Maries, ID, at 10:55 am PDT on 4 May 2021 (17:55 UTC), less than 1 km deep.
USGS: 3 km NNW of Saint Maries, Idaho
74 km (46 mi) ESE of Spokane, WA · 43 km (27 mi) SSE of Coeur d'Alene, ID
- When
- 10:55 am PDT on 4 May 2021 ()
- Where
- 4 km (2 mi) north-northwest of Saint Maries, ID · earthquakes near Saint Maries
- Idaho today
- every earthquake in Idaho in the last 24 hours
- Magnitude
- M 2.1 (ml)
- Depth
- -0.7 km below the surface
- Felt
- no reports yet
- Nearest
- Benewah County, 15 km SSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2017 days ago
Earthquake alerts for Saint Maries, ID
Get a notification in this browser when USGS records an earthquake near Saint Maries, ID. 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, people at rest would likely notice it out to about 18 km (11 mi) from the epicentre. In Saint Maries, 4 km away, the estimate is intensity III (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: Plummer.
USGS catalogues this as explosion, not an earthquake.
How big was it?
This earthquake released about 51 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 300,000× the energy of this one
- Magna, Utah 2020 M 5.7 210,000× the energy of this one
- Around the size people start to feel M 3.0 19× the energy of this one
- This earthquake M 2.1 about 51 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 47.3455, -116.5762. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Benewah County, ID | 15 km (9 mi) | SSW | earthquakes near Benewah County |
| Kootenai County, ID | 38 km (24 mi) | NNW | earthquakes near Kootenai County |
| Shoshone County, ID | 52 km (32 mi) | E | earthquakes near Shoshone County |
| Latah County, ID | 60 km (37 mi) | SSW | earthquakes near Latah County |
| Spokane County, WA | 69 km (43 mi) | WNW | earthquakes near Spokane County |
| Whitman County, WA | 87 km (54 mi) | WSW | earthquakes near Whitman County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
22 earthquakes have been recorded within 50 km since this one.
- 2.1 4 km E of Plummer, Idaho
- 1.8 5 km WNW of Rockford Bay, Idaho
- 2.1 4 km NW of Rockford Bay, Idaho
- 1.6 7 km SSE of Saint Maries, Idaho
- 1.6 13 km SSE of Liberty Lake, Washington
- 2.1 6 km N of Onaway, Idaho
- 2.0 3 km N of Harrison, Idaho
- 2.1 10 km SSW of Saint Maries, Idaho
- 1.9 4 km SSE of Saint Maries, Idaho
- 2.0 4 km E of Plummer, Idaho
- 1.6 9 km NNE of Parkline, Idaho
- 1.6 4 km N of Rockford Bay, Idaho
- 1.9 4 km SW of Farmington, Washington
- 1.9 7 km S of Chatcolet, Idaho
- 1.6 7 km WNW of Rockford Bay, 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.