San Marcos, TX has a very low earthquake risk, with a total of 0 earthquakes since 1931. The USGS database shows that there is a 0.26% chance of a major earthquake within 50km of San Marcos, TX within the next 50 years.
View the probability of a major earthquake within the next 50 years in San Marcos, TX.
See Texas Earthquake Report or Hays County, TX Earthquake Report