Scientists say an August earthquake in Virginia, which cracked the Washington Monument, has led to a renewed emphasis on trying to understand more about what lies below the Earth’s surface in eastern states.
“It will help us to understand where the earthquakes are, where the faults are and generally get a clearer picture,” said Bob Woodward, director of USArray, a national project between multiple universities and government agencies to monitor and map the earth’s movements. “You bring the whole structure of the continent into much clearer focus.”
In Georgia, instruments will soon blanket the state, allowing researchers to see for the first time how seismic activity is connected to other regions.
“We will get some unprecedented high-resolution images,” said Lara Wagner, assistant professor of seismology and tectonics at the University of North Carolina at Chapel Hill. “It’s real science in the sense that we’re seeing things that nobody has seen before.”
Wagner is part of a team of scientists working on a project in Georgia that’s related to the broader efforts of USArray, and uses some of the project’s equipment.
Wagner and her colleagues are now installing dozens of seismometers across the state, in addition to the hundreds being used as part of the nationwide USArray project.
About half of the Georgia instruments are already in place, and the other half will be installed in May, Wagner said. They’re expected to continuously monitor the Earth’s movements until May 2014.
A focus of the Georgia research is the area where scientists believe an ancient supercontinent broke apart.
“We don’t really understand how continents form and how they break apart, and in particular where they decide to break apart when they do and how stable those old structures are,” she said.
In Georgia and other states, knowledge of earthquakes is far more limited than in the western U.S. In California, for instance, the reasons for Earth’s upheavals are far more obvious because of a well-known plate boundary, Woodward said.