Data, Global Science
NEIC Bulletins and Catalogs
S. Sipkin, et al.
International Seismological Centre Bulletin
CTBTO Int'l Data Centre Bulletin
Bias in Global Bulletins
J. Murphy and B. Barker
Directions for Global Bulletins
Turkey Seismic Experiment
E. Sandvol, et al.
Edge of the Plate
J. Lees, et al.
Annual IRIS Workshop
Summer Internship Program
From the Archives
Event Catalogs at the DMC
Natural Hazards Caucus
Seismologists Campaign for Open Data
and SSA Issue Joint Statement on Test Ban Treaty
IRIS 5-Year Proposal
IRIS Workshop, Calendar, Internship Program, New Members
Local Data, Global Science
For over a century,
openly exchanged data has been the cornerstone of seismology. Little
can be done with the recordings from a single seismic station, and
elastic wave propagation does not stop at either political or institutional
boundaries. The nature of our science requires openly distributed
data, and global bulletins serve as both evidence for this requirement
and as a symbol of international cooperation.
on the Internet, relayed by satellite, transmitted by modem, or
mailed as tape, seismological data travel around the world each
by almost every
form of transportation and in almost every medium. Unusual ground
motion at one observatory triggers inquiries to other observatories.
Time windows are selected, arrivals are identified, phases are associated,
events are analyzed, and results are shared. For each earthquake,
one can never predict which pathway will lead to a new discovery
and which location will provide the critical data.
This issue of
the IRIS Newsletter features articles (along with additional
commentary) on the global bulletins produced by the US Geological
Survey, the International Seismological Centre, and the International
Data Center for the Comprehensive Nuclear Test Ban Treaty. While
few of us pay attention to the vast infrastructure (both technical
and political) that routinely provides us with global earthquake
information at the "click of a mouse", none of us could
imagine doing our science or teaching our courses without it.
of its proximity to Washington, DC, earthquake reports sent from
the Georgetown University Observatory (established in 1909) were
often the first to be received by the US Government. Pictured above,
the Dean of the Graduate School reads a Roman ritual as part of
the blessing for the new seismograph installed in 1959. (See story