QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6ml

Earthquake near Durango, CO

No earthquake was likely felt in Durango in the 24 hours to 9:38 pm MST (04:38 UTC). The last one was M 5.0, 635 km (394 mi) ESE, at 4:21 am MDT on 23 July 2026, estimated intensity II (weak) in town; 499 felt reports to USGS. Every earthquake near Durango

This page: a magnitude 3.6 earthquake was recorded 49 km (30 mi) north of Durango, CO, at 7:03 am MST on 10 March 2023 (14:03 UTC), 6.9 km deep. 39 people have reported feeling it to USGS.

USGS: 16 km S of Ophir, Colorado

7:03 am MST, Mar 10, 2023 · · 6.9 km deep · released about 3.8 tons of TNT

10 km30 km60 km120 km N San Juan County 17 kmHinsdale County 42 kmLa Plata County 47 kmOuray County 49 kmDolores County 58 kmSan Miguel County 61 kmMineral County 76 kmMontezuma County 78 kmMontrose County 86 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
7:03 am MST on 10 March 2023 ()
Where
49 km (30 mi) north of Durango, CO · earthquakes near Durango
Magnitude
M 3.6 (ml)
Depth
6.9 km below the surface
Felt
39 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
San Juan County, 17 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 763 days ago

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 69 km (43 mi) from the epicentre. In Durango, 49 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.

Likely felt in: Telluride 25 km, intensity III. Estimated for each town centre; each link is that town's own record.

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.

  1. Northridge, California 1994 M 6.7 45,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,400× the energy of this one
  4. This earthquake M 3.6 about 3.8 tons of TNT
  5. 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.

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 37.7120, -107.8469. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Juan County, CO 17 km (11 mi) ENE earthquakes near San Juan County
Hinsdale County, CO 42 km (26 mi) ENE earthquakes near Hinsdale County
La Plata County, CO 47 km (29 mi) S earthquakes near La Plata County
Ouray County, CO 49 km (31 mi) N earthquakes near Ouray County
Dolores County, CO 58 km (36 mi) W earthquakes near Dolores County
San Miguel County, CO 61 km (38 mi) WNW earthquakes near San Miguel County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

6 earthquakes have been recorded within 50 km since this one.

  1. 2.6 15 km SSW of Sawpit, Colorado
  2. 2.5 12 km SE of Silverton, Colorado
  3. 2.0 6 km NW of Rico, Colorado
  4. 1.8 16 km WSW of Loghill Village, Colorado
  5. 2.1 14 km S of Ophir, Colorado
  6. 2.2 16 km S of Ophir, Colorado

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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.