USGS Professonal Paper 1096 - IRIS

ALASKA
Clear news, AI(
GENERAL INfORMATION
Operated by:
Address:
Department of the Air Force
13th Missile Warning Squadron (ADe)
Clear Hews, AI< 99704
Telephone: 907-522-3333
Address to obtain records:
UnkDown.
SITE INFORMATION
Code
Station name
Latitude Longitude Elev Date Date
(deg N.) (deg W.) (meters) opened closed
Foundation; geologic age
CHA Clear Hews-------------- 64.2900 149.1800 lSI 1964 1/74 Unconsolidated, glaciofluvial,
sandy gravel; late Pleistocene.
INSTRUHENTATION
Seismometer Galvo Type Hagnification
Code Type Co~onent T (sec) T g (sec) recording .t T
0
,
Remarks
CHA Geotech 4681--------- Z 1.0 --- Helicorder 250 K Two systems: one, part of
the warning system; one,
a monitor subsystem.
Tilliing system:
Oven-controlled, quartz-crystal frequency standard and Stroboscope, Model SSU4.
System response curves:
Not available.
SHORT HIStORY
CHA was activated in 1964 in order to give warning of seismic disturbances that might require radar-antenna realinement.
Poor location, difficulty in obta ining pa rts, and excessive maintenance led to deactivation of the station in January 1974.
10