The September 16, 2024 earthquake
M5.1North of Tarzan, Texas
A magnitude 5.1 earthquake 3.8 miles deep, centred in Martin County. The 7th strongest in Texas’s record since 1900, and the strongest within 50 miles since a magnitude 5.2 on December 16, 2022. 9 aftershocks of magnitude 2.5 or more followed within 30 days.
The earthquake
- Magnitude
- 5.1
- local magnitude (ml)
- Depth
- 3.8 mi
- 6.1 km below the surface
- Local time
- Monday, September 16, 2024
- 19:49 CDT; 00:49 UTC on Sep 17, 2024
- In Texas’s record
- 7th
- strongest of 4,714 since 1900
USGS ANSS Comprehensive Earthquake Catalog, event tx2024shcj (“2024 North of Tarzan, Texas Earthquake”). The USGS event page carries the ShakeMap, felt reports and the official summary.
Aftershocks
Earthquakes of magnitude 2.5 or more within 20 miles of the epicentre in the 30 days after.
9
Aftershocks in 30 days
3.3
Largest aftershock, Sep 27, 2024
2
On the first day
1
In the 7 days before
- The search radius is the surface rupture length expected for an earthquake of this magnitude (Wells and Coppersmith, 1994), at least 20 and at most 600 miles, so a great earthquake's sequence is counted along its whole fault.
Counties and cities within 50 miles
Distance from the epicentre to each county boundary (zero when inside) and to each city centre.
Counties
- Martin CountyTX · inside
- Gaines CountyTX · 11.5 mi
- Dawson CountyTX · 11.5 mi
- Andrews CountyTX · 11.9 mi
- Howard CountyTX · 22.9 mi
- Borden CountyTX · 22.9 mi
- Ector CountyTX · 26.1 mi
- Midland CountyTX · 26.1 mi
- Glasscock CountyTX · 27.8 mi
- Lynn CountyTX · 37.9 mi
- Terry CountyTX · 37.9 mi
- Garza CountyTX · 47.8 mi
- Winkler CountyTX · 48.8 mi
- Yoakum CountyTX · 49.1 mi
Cities, largest first
- MidlandTX · 26.9 mi
- OdessaTX · 40.4 mi
- Big SpringTX · 35.4 mi
- AndrewsTX · 29.5 mi
Earthquakes around the epicentre
118 earthquakes of magnitude 3 or more within 50 miles of this epicentre since 1973.
USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.