A new study released by the University of Texas and Southern Methodist University finds a correlation between a series of minor earthquakes in north Texas and the operations of a disposal well on Dallas-Fort Worth International Airport property, according to this article in the Houston Chronicle. The take away at the end of the article: "But he [i.e., an SMU geophysicist who worked on the study] said the study raises more questions, since no quakes have been reported around the 200 other disposal wells in seven north Texas counties."
Just remember: Correlation does not imply causation.