Southern Methodist University representatives installed a seismograph in Cleburne on Monday morning [6/15/09] and plan to install three more around town later this week.
The instruments measure ground motion by collecting 200 samples per second, said Dr. Brian Stump, SMU chairman of geological sciences.
. . .
Stump and Dr. Chris Hayward, SMU Geophysics Research Projects director, set up the device along with Ashley Howe, a junior majoring in earth science.
The instruments will stay in place for two weeks, at which time they will decide whether to move them, or leave them in place, Stump said.
. . .
The U.S. Geological Survey records such activity but generally doesn’t pursue investigation of events measuring less than a magnitude of three, Stump said.
Placing seismographs in town should provide a fuller picture of any seismic activity occurring in the area, he said.
Officials plan to measure activity for up to six months, Hayward said.
Independent Research Institute in Seismology officials loaned 10 seismographs to SMU for that amount of time, he said.
Others have been placed south of DFW International Airport in response to area quake activity recorded in October. News of last week’s events in Cleburne prompted SMU officials to place the instruments in town as well, Stump said.
SMU is conducting its research independently although city officials are cooperating by providing storage locations and information to help the team, said City Manager Chester Nolen.
City officials await results from the study to determine what else needs to be done, Nolen said.
The city council, in a June 9 emergency meeting, voted to hire a geophysicist to study the recent earthquakes.
Officials subsequently decided to work with SMU instead, Nolen said, and “... at at this point, there’s no cost to the city,” Nolen said. “We get the research we need without spending money.”