USGS Professonal Paper 1096 - IRIS

USC&GS--Continued USGS U.S. Geological Survey.
Prior to 1973 the USGS was doing
Enviromental
seismic research primarily in the
Science Services
National Center for Earthquake Research
Administration
(NCER) at Menlo Park, Calif.
(part of the
USC&GS)
National Ocean
Survey (within
NOAA)
Environmental
Research Laboratories
(within
NOM)
llStlS (ll.S.
Department of
the Interior)
July 1965-0ctober
1970
October 1970_ Tuly
1971
July 1971-September
1973
September 1973-
present
The NElS is an example of an office
that evolved through this system, previous
ly being called the National
Earthquake Infolmation eenter ill the
U.S. Department of Comerce.
VELAlJ-nifO:ml
WWSSN
WWV and
WWVB
NCER and NElS, as well as research
branches from both Departments J
merged to form. the Office of Earthquake
Studies.
A. proj ect funded by ARPA under wbi ch
several seismic monitoring projects
(LRSM, TFO, CPO, etc.) were conducted.
World-Wide S1 andardi zed Sei smograpb
Network--standard instruments developed
by the USC&GS and currently
ma~nta~ned by the USGS.
Call letters of radio stations of the
National Bureau of Standards that
cont~nually broadcast tiwe signals.
They broadcast at different frequencies
and WWVB also includes a time
code consistent with Coordinated
Un1versal Time that can be Iecolded
directly on magnetic tape.
Use of brand names in this report Is for descriptive purposes only
and does not constitute endorsement by the u.s. Geologiall Survey
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