Sharp Rise of U.S. Quake Numbers Due to Oil & Gas Extractions
By Esther Tanquintic-Misa | July 4, 2014 4:56 PM EST
The sharp growth in the number of earthquakes in Oklahoma, U.S., have been found not to be borne out of natural seismic causes but due to the massive injections of wastewater by oil and gas extraction.
REUTERS/Francisco Alcayaga Mot
A general view shows the aftermath of an earthquake and tsunami that hit the northern port of Iquique, April 2, 2014. The earthquake, with a magnitude of 8.2, struck off the coast of northern Chile near the copper exporting port of Iquique on Tuesday evening, killing six and triggering the tsunami that pounded the shore with 2-meter (7-foot) waves. REUTERS/Francisco Alcayaga Motta
Made up of just four wells, those facilities have managed to trigger over 100 small to medium earthquakes in the past five years, a study published on Thursday by the journal Science said. These four wells pump 4 million barrels of water a month to 3.5 km beneath the surface.
Those four wells, when combined, inject over 5 million gallons of water a mile or two into the rock formations underground, the study found. And this happens every day.
"That buildup of fluid creates more pressure that has to go somewhere," Katie Keranen, study lead author Cornell University seismologist, told AP.
Many of the quakes triggered off by the massive drilling were found to have occurred much farther away from the wells.
The research noted that since 2008, the small town of Jones has experienced over 2,500 earthquakes greater than magnitude 3.0, representing 20 per cent of the total in the central and western U.S. in that particular period alone.
"There are large regions in the state that are lighting up with quakes," Keranen said. "It's a very profound increase."
Data from the U.S. Geological Survey showed that over 300 earthquakes above magnitude 3.0 had occurred from 2010 to 2012 in the central and eastern U.S., compared to the average annual rate of only 21 from 1967 to 2000.
For Oklahoma, from 2008 to 2013, an average of 44 earthquakes of magnitude 3 were felt every year. For 2014, there have been 233 so far, Keranen said.
Researchers found the water diffused through underground moves faster and farther, triggering quake fault lines that already were likely ready to move, she said.
"You really don't need to raise the pressure a great deal," Keranen said.
To report problems or to leave feedback about this article, e-mail:
To contact the editor, e-mail:
Most Popular Slideshows
Join the Conversation
- 2014 Meteor Shower: Slooh To Have Live Broadcast Of Orionids Meteor Shower October 21 Peak, NASA Assures Ideal Observing Conditions
- Kate Middleton Makes First Public Appearance, Sickness Seems Over
- Kate Middleton To Give Birth To A 'Cheerful' Baby, Duchess Not Carrying Twins---Report
- Woman Stuck In Chimney: Genoveva Nunez-Figueroa Arrested For Attempted Break-In After Rescue Team Pulls Stuck Woman Out Of Chimney
- 63-Year-Old Admits He Has Made Love To More Than 700 Cars But Now Remains Faithful To Just One Beetle
- Chilling: New ISIS Video Addresses Australia; Aussie Teen Delivers Message
- The Pirate Bay Blockade: Cost Of Blocking Websites Like TPB Is Ridiculously High
- Xiaomi Mi4 And MiPad Prices Likely Slashed, Thanks To Rivals Oppo, OnePlus And Meizu
- Top 4 Free-To-Download Apps for Fuller iPhone 6, 6 Plus Experience
- Australia's 'No Way' Anti-Asylum Seeker Poster Sparks Outrage