WARREN - Explosive blasts used in seismic testing for underground minerals going on Wednesday in parts of Trumbull County left residents alarmed and without warning, one resident said.
Seismic testing, a method of evaluating underground minerals prior to oil and natural gas drilling conducted in various locations around Trumbull and Mahoning counties, was taking place Wednesday morning in Palmyra Heights, residents said.
"We didn't know what was going on," said Rose Long, Palmyra Heights resident. "I could feel a major vibration going on under my feet. I thought we were having an earthquake."
Long noted trucks labeled "Tideland Geophysical Co." were in the area during the vibrations.
A woman who answered the phone at the company's Texas office said the company would not comment to the media.
The seismic testing process involves burying small explosives in a grid pattern. The points are set off one-by-one, sending sound waves into the ground to create algorithms which then are analyzed by geophysicists to determine the amount of natural gases in specific areas. The information is used by drilling companies to determine the best places to drill.
According to information provided by the Ohio Division of Oil and Gas, the process is not state regulated because the testing is done under a private agreement between the company and the landowner.