Underground pressure may be triggering earthquakes near Coushatta

COUSHATTA, La. - Residents in and around Coushatta are concerned about a rise in earthquake activity.

At least 10 quakes have been recorded in the past 30 days, according to the United States Geological Survey.

Scientists say the increase may be linked to underground wastewater injection, which can raise pressure deep below the surface.

A magnitude 4.9 earthquake recently prompted a response from the U.S. Geological Survey, drawing attention from state and federal agencies.

Tulane University Professor Cynthia Ebinger says saltwater injection and wastewater disposal can increase pressure on underground rock formations.

Over time, that pressure can cause movement along weak points in the rock, triggering earthquakes.

While small tremors are common, Ebinger said the recent activity stands out because of its frequency and strength. She said more earthquakes are possible, though larger ones are less likely.

New seismic monitoring equipment has been installed in the area to track activity in real time. Researchers say the data will help them map fault lines, analyze patterns and address concerns about potential groundwater contamination and future earthquakes.

Officials are urging residents who feel shaking to report it through the U.S. Geological Survey’s “Did You Feel It?” tool to help track seismic activity.