SAINT LOUIS UNIVERSITY
Earthquake monitoring in Missouri and neighboring states is a cooperative multi-institutional effort. Participating groups include the University of Kentucky, the University of Memphis, Lamont-Doherty Earth Observatory of Columbia University, the U. S. Geological Survey, and Saint Louis University. Instrumentation operated by the University of Memphis primarily monitors earthquakes in the New Madrid Seismic Zone and is capable of locating very small events. The University of Kentucky and LDEO emphasize on-scale recording of large New Madrid events. Saint Louis University also contributes to the monitoring of New Madrid earthquakes, but their specific role is to monitor earthquakes in the broader central U. S. region. Saint Louis University and the University of Memphis are jointly responsible for the Cooperative New Madrid Seismic Network (CNMSN). In addition to having different sensitivities, the instruments deployed by various groups sample different frequencies of ground motion and may have triggered or continuous recording.
Saint Louis University, in their contribution to both the CNMSN and broader regional monitoring, has focussed on broadband, high dynamic range continuous recording. The accompanying figure shows proposed and existing locations of broadband stations in the region.
Broadband stations are operating at CCM (IRIS), OXF (USNSN), WVT and WCI (Billiken/USNSN), and SLM, BLO, UTMT, MPH, PLAL, SIUC and UALR (CNMSN). The sites at FVM is ready for installation, and that at PVMO will be prepared soon.
The unique aspects of SLU broadband stations are its use of modern communication technology, satellite communication and the Internet, and cooperation with regional universities. Because the Internet provides relatively inexpensive data transfer, some of the instruments are being deployed at university facilities. Deployment in populated regions, even though higher cultural noise can be high, is especially important since we are interested in the larger earthquakes that will shake communities. The cooperating universities are the University of Indiana (BLO), Southern Illinois University at Carbondale (SIUC), the University of Memphis (MPH), the University of Tennessee at Martin (UTMT), and the University of Arkansas Little Rock (UALR).
Example of daily seismogram available on the WWW. This is the MW = 7.1 Turkey earthquake of November 12, 1999 recorded at St. Louis.
The purposes of the broadband deployment are to:
During 1999, we
During 2000, we need to
The function of the Saint Louis University Earthquake Center is to serve the public by providing basic information, the scientific community with quality data for research and government agencies with near real-time locations. A mechanism for providing this service is through use of the World Wide Web.
Further information on the broadband network, on reporting felt earthquakes or of recent earthquake recordings is available from the Saint Louis University Earthquake Center on the World Wide Web:
or by Telephone: 314 977 2236.
R. B. Herrmann
B. J. Mitchell
Saint Louis University Earthquake Center