USGS Professonal Paper 1096 - IRIS

MASSACHUSETTS
Callbndge. HA
GEllERAL INFORMATION
Op@rat@d by:
Address:
Massachusetts Institute of Technology .nd
Harvard University
Department of Earth .nd Planetary Sciences
Building 34, RoolU 327
Massachusetts Institute of Technology
Cambridge, MA 02138
Telephone: 617-253-7796
Address to obtain records:
As ahe we.
SITE INFORMATION
Code
Station
name
Latitude Longitude Elev Date Date
Foundation; geologie .g.
(deg N. ) (deg 101.) (meters) opened closed
CAM Cambridge--------------- 42.3833 11.1]61 5 19:08 19:30' s ---
(DUX) Duxbury----------------- 42.0686 70.7678 27 10/76 Open-- Gneiss; Devonian.
GLO GIoucester-------------- 42.6403 70.7272 15 8/75 --do-- Granite; Devonian.
HRV Harvard (Oak Ridge)----- 42.5064 71.5583 180 1933 --do-- Gneiss; Devonian.
WFH Westford---------------- 42.6106 71. 4906 88 5/76 --do-- Granite; Devonian.
INSTRUMENTA~ION
Se1smometer Galva Iype Magn1t1cat10n
Code Typ. Component To(sec) Tg(sec) recording .t T 0
Remarks
CAM --- --- --- --- --- --- ---
(DUX) Hark L-4C----------------- Z 1.0 --- Develocorder --- Telemetered to M.I. T ..
GM do ,
1.0 --- ---do------- --- fio.
HRV Geotech S-13-------------- Z,NS,EW 1.0 --- ---do------- --- ---
Geotech 7505A------------- Z 23.0 --- ---do------- --- ---
WFU Ualk t-4e----------------- Z,NS,EII 1.0 --- ---00------- --- ---
Timing system:
Sprengnether TS-250 digital timing system; Kinemetrics model \/vTR mark IV with time-code stripper.
System response curves:
Not available.
SHOR'I' IUS'I'OR¥
CAM was owned .od operated by Harvard University. It wa< located in the Geology Museum, Oxford Street, Cambridge. Wh.n the
Observatory was moved from Cambridge to Harvard, Mass. , HRV was established. It i, still owned by Harvard University but i'
operated by H.LT. under .0 arrangement made in 1970.
Elillf and GloB all" tempOraly s tatious esta1lished fOI use ill the Northeast Seismic lfetwotk.
WFM (Wallace Observatory) , located in Westford, Mass. , i, owned .nd operated by H.1. T. Underground vault construction wn
completed i, April 1975, .nd the sta.tion opened May 20, 1975. Da.ta n. leleme'lered to 11. LT. and recorded at Lhe Seismology
Lab in Cambridge. \lFM i, also equipped with earth-tide gravimeter .nd NS, EW tiltmeters.
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