SeisGram2K Seismogram Viewer ...

... is an easy-to-use, platform-independent, Java software package for interactive visualization and analysis of earthquake seismograms. SeisGram2K runs and reads data files locally and over the Internet.

Click here to try the SeisGram2K Seismogram Viewer

Contents

Overview and features
Download and Installation
Support SeisGram2K development
Try SeisGram2K Seismogram Viewer
Visit the web sites that use the Seismogram Viewer
Java References
Other Software for Seismology by Anthony Lomax
Contact

Overview and features

The Seismogram Viewer displays one or more sets of single trace or 3-component seismograms.

• List of SeisGram2K New Features, Updates, Bugs

Features of the viewer include:

• direct reading of trace data files over the Internet

• Internal browser for opening trace data files on a web server

• reading data in SAC binary and ascii, PEPP, GSE2.1, mini-SEED (preliminary), SEED (preliminary), TITAN (preliminary) and other formats WARNING: The mni-SEED, SEED and TITAN volume-based formats are complex; always check for correct reading and timing of data from these formats.

• interactive zooming, scaling, rotation and transformation of the seismograms

• time and amplitude picking

• time-domain mean-removal, integration and differentiation

• frequency domain filtering and processing

• spectral display

• animated, 3D particle motion visualization

• multiple languages

• integrated help menus

• a "school" mode which displays a sub-set of program options

• reading gzip compressed data files, and "little" and "big-endian" binary byte ordering

• sending picks to a remote process or URL (cgi-bin, Java servlet, ...)

• automatic picking of maximum peak-to-peak and zero-to-peak amplitudes

• frequency domain transfer function removal/addition

• command-line access to processing functions

• SeisGram2K can be launched directly from the SeisGram2KXX.jar archive file.

• SeedLink support and new SeedLink Monitor mode (see MEREDIAN Java SeedLink development)

• Header editor

• Multi-component analysis tools (Polarisation analysis, vector operations, ...)

• Interface and viewing additions and improvements

• near-realtime, data-monitoring mode "SeisGram2K-LiveSeis" and "SeisGram2K SeedLink Monitor"
  (view near-realtime data from Southern France with LiveSeis)

SeisGram2K can be run in two ways:

• As a stand-alone application (SeisGram2K) that runs locally and which can read data files locally or across the Internet.
  SeisGram2K stand-alone will run on any type of computer which has a recent version of Java available on your system (JRE (Java Runtime Environment - for end users), or Java SDK (Java Software Development Kit - for developers)), you can download Java from Sun for LINUX, Solaris, Macintosh and Windows.  Additional features of the stand-alone application SeisGram2K include:

  • direct reading of data files over the Internet from any server

• printing

• saving traces to disk in SAC binary format

• display and interactive update of seismic phase travel-times using the TauP toolkit

• As an applet (SeisGram2KApp) that is installed on a central web server and which is launched over the Internet from an HTML web page on the server.
  SeisGram2KApp "applet" can be viewed from any type of computer with Internet access and a recent web browser that supports Java 2 or higher (i.e. Netscape 7 or higher, Internet Explorer 6 or higher).
  The default applet security settings restrict SeisGram2KApp to reading data files only from the same server from which it was launched. These security restrictions also prevent or limit the printing and writing of data files.

Download and Installation

SeisGram2K and SeisGram2KApp are available for free download from the web. Currently, you can download and install the current version under the terms of the GNU General Public License. Please e-mail to Anthony Lomax for more information and to suggest or request features for future versions.

(Most recent beta release)

SeisGram2K is also distributes as a component of the QuakeExplorer Earthquake Browser and Analysis Tool.
The QuakeExplorer browser lets you rapidly explore, visualize and analyse the latest earthquake events and associated seismic traces over the Internet. For visualization, QuakeExplorer launches the Java applications SeismicityViewer and SeisGram2K.

Support SeisGram2K development

The development and maintenance of SeisGram2K is funded entirely by software and research contracts with Anthony Lomax.  If you have a specific development or research request concerning SeisGram2K or other open source software, please contact Anthony Lomax or visit the Scientific Software web site.  Thanks!

Try SeisGram2K Seismogram Viewer

(requires a browser with Java 1.1 or higher installed and enabled, and with JavaScript enabled; Netscape 4.5 or higher or Internet Explorer 5 recommended)

The Seismogram Viewer applet will be launched when you view one of the events below. (Be patient, it may take a while to load the first time!) If you have problems, I would appreciate hearing about them - e-mail to Anthony Lomax; please specify your computer and browser type and version.

Try also the near-realtime, data-monitoring mode "SeisGram2K-LiveSeis": (view near-realtime data from Southern France with LiveSeis)

Visit the web sites that use the Seismogram Viewer

• ORFEUS WILBER II interface for accessing SPYDER® data.

• "EDUSEIS" Valbonne, France (Follow the links to "Accès aux données" and then "Consulter").

• "EDUSEIS" Naples, Italy (Follow the links to real-time or to event data.).

• "EDUSEIS" Marseille, France (Follow the links to "Sismogrammes" and then "Consulter").

Java References

• Sun's introduction to Java: What is the JavaTM Platform?

• Sun's introduction to Applets: APPLETS

• An article on Java in seismology by Anthony Lomax: Java for the Seismologist - Orfeus Newsletter

• For more seismological Java information and links, see ORFEUS Seismological Software Library: Java applicationss

Other Software for Seismology by Anthony Lomax

• QuakeExplorer Earthquake Browser and Analysis Tool - browser to rapidly explore, visualize and analyse the latest earthquake events and associated seismic traces over the Internet.

• Seismicity Viewer - Java applet for viewing earthquake locations and other data in 3D.

• NonLinLoc software package - global-search earthquake location and supporting programs for UNIX.

• Anthony Lomax's software page

• Anthony Lomax's science page

Contact

Any Questions? Comments? Suggestions? Please e-mail to Anthony Lomax.