USGS Professonal Paper 1096 - IRIS

MONTANA
Columbla Falls, HI
GENERAL INFORMATION
Operated by:
Address:
Telephone:
Roy E. Wendt for the U.S. Geological Survey
Roy E. Wendt
Rte. lA
Eolmnbia Falls, 1fT 39912
406-892-3715
Address to obtain records:
SITE INFORMATION
U S. Geological Survey
Branch of Global Seismology
Stell %7
Box 25046, Denver Federal Center
Denver, CO 80225
Code
Station name
Latitude
(deg N.)
Longitude
(deg W.)
Elev Date Date
(meters) opened closed
Foundation; geologic age
IIHM Hungry Horse------------ 48.3494 114.0275
1100 11/10/47 Open--
Belt Supergroup (argillaceous
limestone) ; Precambrian.
INSTRUMENTATION
Seismometer
Code Type Component T (sec)
0
Galvo
Tg(sec)
Type
recording
Magnification
at T
0
Remarks
101M Benioff-------------- z .05
wllson-Lamlson------- NS,Ew 3 5
0 50 Photo paper
4 0 ---do------
188 K
10 K riagnulcatlon at 4 sec.
Timing ~y~tem:
TBM clock, HRO-60 National receiver.
System response curves:
Available from station.
snaRf HIS'fBRY
HHM was established before the Dam was erected to monitor seismic activity of the area.
Bureau of Reclamation, the NElS took over the operation in about 1960.
Originally maintained by the U.S.
187