USGS Professonal Paper 1096 - IRIS

NEW HAMPSHIRE
Twin Mountain, NH
GENERAL INFORMATION
Operated by:
Address:
New Hampshire Highway Department
for the U.S. Geological Survey
New Hampshire Highway Department
Box 82
Twin Mountain, NH
Address to obtain records:
SITE INFORMATION
Unknown.
Code
Station name
Latitude Longitude Elev Date Date
(deg N.) (deg W.) (meters) opened closed
Foundation; geologic age
FNN Franconia Notch--------- 44.1600 71.6817 1060 1967 1975 Granite.
INSTRU!1ENTATION
Seismometer Galvo Typ' Magnification
Code Typ' Component T o(sec) T (sec) recording at T
g 0
Remarks
FNN Texas Instruments---- Z 1.0 --- 35-nun film --- Four instruments in an
array.
Timing system:
Sprengnether TS-I00.
System response curve:
Uncalibrated.
SHORT HISTORY
Th, small array was set up Lo monitor the activity around the Great Stone Face, so that the State Highway Department could
evaluate the threat to this natural landmark created by a nearby highway.
211