Scientists at the U.S. Geological Survey (USGS) have found no reason to interrupt fracking while they further study potential between injection wells and earthquakes.
There are approximately 144,000 injection wells operating in the United States, 20% of which are used for disposal of fluids associated with oil and natural gas production. Most of the fluid injected back underground is salt water (brine), which is brought to the surface as a result of producing oil and natural gas. The Underground Injection Control (UIC) process is regulated by either the state or a federal agency.
Researchers have noted that thousands of injection wells exist across Texas without associated earthquakes. The oil and natural gas industry supports robust research to assess possible risks.