USGS Professonal Paper 1096 - IRIS

MINNESOTA--Continued
Minneapolis, MN
S1I9RT1!!~}q~y
(CMI-6) i, an array funded by the U.S. Department of Energy in the vicinity of the Lake Superior Geologic Province. It i,
of interest because of its proximity to the mid-continent gravity high and to a major fault, and because it i, wi thin 150 km of
the epicenter of the 1975 earthquake.
DUL was run by th, University of Minnesota, Duluth. It ofJerated lntermlttentlv before 1954 and then 0Eerated continuously
between 1955 ond 1956 using one short-period vertical Benioff . In 1956 th, USC&GS installed two short-period horizontals. Some
records were sent to the USC&GS and a few were saved for display. The rest were discarded.
MNM is loca ted on the campus of the University.
I1NN was started in 1964 as a WWSSN station and ran until 1967. It was abandoned because of flooding problems.
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