NEW_Accomplishments.indd - IRIS

SIGNALS AND SYSTEMS
2006 IRIS 5-YEAR PROPOSAL
ISC On-line Bulletin and IRIS DMC Waveform Retrieval
Ray Willemann, James Harris • International Seismological Centre
After finding events in the ISC Bulletin
relevant to their work, the next step many
seismologists follow is to obtain waveforms
for further study. The ISC began offering
systems to assist on-line bulletin users
retrieve waveform data for specific events
in early 2002. Most of these systems were
agency and event specific. However, with the
co-operation of the IRIS DMC a system was
developed to create a request for the event of
interest for data from the continuous waveform
archive at IRIS. SeismiQuery was modified
by IRIS to produce an inventory for a
requested time period and tied to the stations
used to locate the event by the ISC. The user
could then select the data of interest before a
request was submitted after this point contact
would be between the user and IRIS directly.
It was in operation for just one year during
which period waveforms for over 300 events
were requested.
From early 2003, a new ISC system
has been operating that integrates all available
data centre waveform archive/retrieval
systems into a single request for each event.
This incorporated the work done with IRIS
to ensure that an up-to-date inventory was
used to create the data request. The system
has proven popular with ~700 event requests
made in each year of operation.
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