M5.4 earthquake 4 km W of San Marcos, Mexico
A magnitude 5.4 earthquake struck 4 km W of San Marcos, Mexico on Thu, Sep 17, 1981, 3:50 AM CST (09:50 UTC), 22 km (14 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.4 (mb), moderate
- Local time
- UTC
- 1981-09-17 09:50:32 UTC
- Depth
- 22.0 km (13.7 mi), shallow
- Epicenter
- 16.800° N, 99.429° W
- Region
- Mexico
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- CONSTRAINED_BY_DEPTH_PHASES
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.4 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.34 km WSW of Llano de la Puerta, Mexico · 16441 days ago · 25 km deep · 16 km away
- 4.57 km NNE of Cuanacaxtitlán, Mexico · 16392 days ago · 64 km deep · 88 km away
Before
Earthquakes todayMexico earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001fxt (also filed as iscgem611633). Read Tue, Sep 22, 2026, 7:56 AM UTC.