USGS Professonal Paper 1096 - IRIS

MISSOURI--Continued
St. Louis, MO
Timing system: WWSSN standard TS-I00, Astrodata TeG.
System response curves: FLO--see figure
" p. 363. FVM--see figure available from station.
"
p. 363, 'nd figure 6, p. 365. Others
SHORT HI STORY
BM h,d many instrument Eroblems and, conseguently, only intermittent records exist.
BRR ." used ,n experimental station for testing different kinds of instruments.
CGM "
." founded in cooperation with Southeast Missouri State Teachers College in 1938. For some periods of , year or more,
the station ha< not been in operation.
DON, mlM, LST, 'nd RMB ore stations in the SIK array. Their instrumentation i' modified USGS microearthquake equipment.
EDD
" , station in the PGA array. It uses modified USGS microearthguake eguiQment.
FLO began operation in 1928 with , Wood-Anderson NS ,nd EW system ,nd , Galitzln-IHlip three-component system.
The IoJI...·SSN
equipment wa< installed on December 1961 ,nd operated until August 1971 when ,he equipment wa< moved to FVM.
FRM w", closed in 1972 because of " the clos Lng of the lead mine in which it w", J.ucated.
EVM
" , remote s~te bur~ed ,n , vault near the Missouri ConservatIon Department f~retower slte. A t.emporary system (Mark
L-4C, helicorder) operated intermittently for 2 years before the WWSSN equipment w", installed on October 5, 1974. The portable
Benioff's were used instead of the larger units because of the difficult access to the vault.
GRV w", , temporary station, opera ting intermittently from its start in 1964 until 1969. It "n continuously from 1969 to
1974, with one intermit.tent period from 1972 to 1973.
LST i, located in , region of sand blows from the 1811-12 earthquakes.
MLD, NMM, ,nd PTG were part of ,n early tripartite network, later moved to Tennessee.
S1M was founded in 1909 'nd has been in continuous operation since that time, having been relocated once in 1926 less than
1 km from its original site. Unfortunately, some of the older Wiechert records have been lost, over th. years, ,nd
" continuous
records do not exist before about 1927. Between 1925 'nd 1960, the station °Eerated Central Station of the Jesuit Seismological
Association. Presently, it serves headquarters for the Saint Louis University " network of some 25 stations in ,n
area of 80,000 km'.
"'
TIS i, located 30 km southwest of St. Louis at the Washington University biological preserve. It ;, used for testing
other sel.smograph systems, ana the l.nstruments ,t liS ore used to test other locatlons.
Sixteen of the stations in the University's multi-state network ,re supported by USGS grants.
Tbe University publishes , quarterly bulletin of the Southeast Missouri Regional Seismic Network.
IBI