Earthquake · reviewed by a seismologist
M 3.6ml
6 km WSW of Westbrook, Texas
- When
- Magnitude
- M 3.6 (ml)
- Depth
- 8.6 km below the surface
- Felt
- 6 reports · strongest reported intensity IV
- Measured shaking
- intensity IV (ShakeMap)
- Nearest
- Mitchell County, 15 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 718 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.
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 32.3300, -101.0770. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Mitchell County, TX | 15 km (9 mi) | WNW of here | earthquakes near Mitchell County |
| Howard County, TX | 34 km (21 mi) | E of here | earthquakes near Howard County |
| Scurry County, TX | 49 km (30 mi) | SSW of here | earthquakes near Scurry County |
| Sterling County, TX | 55 km (34 mi) | N of here | earthquakes near Sterling County |
| Borden County, TX | 57 km (35 mi) | SE of here | earthquakes near Borden County |
| Nolan County, TX | 62 km (38 mi) | W of here | earthquakes near Nolan County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
3 earthquakes have been recorded within 50 km since this one.
- 2.2 24 km SSW of Westbrook, Texas
- 1.6 23 km SSW of Westbrook, Texas
- 1.9 6 km WSW of Westbrook, Texas
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.