HR: 1340h
AN: SF13A-0705    [Abstracts]
TI: New Software for Long-Term Storage and Analysis of Seismic Wave Data
AU: * Cervelli, D P
EM: dcervelli@stanford.edu
AF: U.S. Geological Survey, Alaska Volcano Observatory, 4200 University Ave, Anchorage, AK 99508
AU: Cervelli, P F
EM: pcervelli@usgs.gov
AF: U.S. Geological Survey, Alaska Volcano Observatory, 4200 University Ave, Anchorage, AK 99508
AU: Murray, T L
EM: tlmurray@usgs.gov
AF: U.S. Geological Survey, Alaska Volcano Observatory, 4200 University Ave, Anchorage, AK 99508
AB: Large seismic networks generate a substantial quantity of data that must be first archived, and then disseminated, visualized, and analyzed, in real-time, in the office or from afar. To achieve these goals for the Alaska Volcano Observatory we developed two software packages: Winston, a database for storing seismic wave data, and Swarm, an application for analyzing and browsing the data. We also modified an existing package, Valve, an internet web-browser based interface to various data sets developed at the Hawaiian Volcano Observatory, to communicate with Winston. These programs provide users with the tools necessary to monitor many commonly used geophysical parameters. Winston, Wave Information Storage Network, uses a vendor-neutral SQL database to store seismic wave data. Winston's primary design goal was simple: develop a more robust, scalable, long-term replacement for the Earthworm waveserver. Access to data within the Winston database is through a scalable internet based server application, an Earthworm waveserver emulator, or directly via SQL queries. Some benefits of using an SQL database are easy backups and exports, speed, and reliability. Swarm, Seismic Wave Analysis and Real-time Monitor, is a stand-alone application that was designed to replace the traditional drum helicorder and computer wave viewer with an intuitive and interactive interface for rapidly assessing volcanic hazard, browsing through past data, and analyzing waveforms. Users can easily view waves in traditional analytic ways, such as frequency spectra or spectrograms, and employ standard analytic tools like filtering. Swarm allows efficient dissemination of data and breaks cross-disciplinary barriers by creating an accessible interface to seismic data for non-seismologists. Swarm currently operates with many seismic data sources including Earthworm waveservers and SEED files. Lastly, Swarm can be a valuable education and outreach tool by using its Kiosk Mode: a full-screen mode that displays an interactive real-time helicorder ideal for a visitor center-like environment. All of these packages were developed using open-source and/or free software and are themselves open-source. Only software available on a wide range of architectures and operating systems were used to ensure computer platform independence and portability.
DE: 8494 Instruments and techniques
DE: 7280 Volcano seismology (8419)
DE: 7294 Instruments and techniques
SC: Special Focus: Advances in Data Acquisition, Management, Analysis and Display [SF]
MN: 2004 AGU Fall Meeting