Locations of Broadband Network Stations
In 1990 Saint Louis University and the University of Memphis were awarded
funds by the USGS to upgrade the seismic networks
to form the Cooperative New Madrid Seismic Network. Saint Louis University
is focusing on a broadband seismograph network covering the entire region,
while the University of Memphis has placed a dense network of high
frequency stations directly in the seismicity near New Madrid.
This map shows the locations of the broadband stations monitoring
earthquakes in the region. Those indicated by the triangles
are the broadband component of the Cooperative New Madrid Seismic Network
operated by Saint Louis University. The objectives of these stations
are to
- record significant earthquakes ( M > 3) on scale for ground motion studies
- surround any significant earthquake by broadband stations for rapid determination of
source depth and mechanism
- provide waveform data to define the seismogenic crust
- and provide near real time notification to local, state and federal agencies
To reduce the costs of continuous telemetry, full use is made of
available internet connections. Although most internet sites will
be at universities in towns, which are noisy, earthquakes with magnitudes
greater than 3 will be well recorded. The negative aspects of instrument
locations in towns is mitigated by the fact that all sites in the
Mississippi Embayment will be noisy because of the lack of hard rock at
the surface. The positive aspect is the rapid access to data by internet
and the continuous transmission of data for rapid location of events.
Last Changed November 7, 2002