Seismic Handler
Encyclopedia
Seismic Handler is an interactive analysis program for preferably continuous waveform data. It was developed at the Seismological Observatory Gräfenberg
and is in use there for daily routine analysis of local and global seismic events. In original form Seismic Handler was command line based, but now an interactive version is available.
Gräfenberg
Gräfenberg may mean:* Gräfenberg, a city in Franconia, Germany* Lázně Jeseník , administrative part of city Jeseník, Czech Republic** Gräfenberg Spa, a spa founded by Vincent Priessnitz in Lázně Jeseník- Family names :...
and is in use there for daily routine analysis of local and global seismic events. In original form Seismic Handler was command line based, but now an interactive version is available.
Main features
- Reading traces from continuous data streams in Steim-compressed MiniSEED files. Additionally supported formats are event data from GSE, AH and Q (private format of SH) files.
- Zoom in and out traces in time and amplitude.
- Application of a set of standard filters (simulation filters and Butterworth filterButterworth filterThe Butterworth filter is a type of signal processing filter designed to have as flat a frequency response as possible in the passband so that it is also termed a maximally flat magnitude filter...
s) on broadband input traces. - Reading phases on original or preprocessed traces.
- Determination of signal/noise ratio
- Computation of teleseismic beam traces using array-beamforming or FK-algorithm, determination of slowness and back-azimuth of an incoming wavefront.
- Location of teleseismic events using global travel time tables based on array methods or relative travel times, determination of focal depth using depth phases
- Location of regional and local events using LocSAT program, flexible interface provided for integration of own location programs.
- Integration of an own external programs (e.g.: map display, phase diagrams).
- Displaying theoretical travel times.
- Determination of amplitudes and magnitudeMagnitude (mathematics)The magnitude of an object in mathematics is its size: a property by which it can be compared as larger or smaller than other objects of the same kind; in technical terms, an ordering of the class of objects to which it belongs....
s (ml or mb and Ms). - Saving analysis results into an output text file for further processing.
- Supported operating systems: Sun MicrosystemsSun MicrosystemsSun Microsystems, Inc. was a company that sold :computers, computer components, :computer software, and :information technology services. Sun was founded on February 24, 1982...
/SolarisSolaris Operating SystemSolaris is a Unix operating system originally developed by Sun Microsystems. It superseded their earlier SunOS in 1993. Oracle Solaris, as it is now known, has been owned by Oracle Corporation since Oracle's acquisition of Sun in January 2010....
and LinuxLinuxLinux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...
Additional features
- Rotation of 3-component seismogramSeismogramA seismogram is a graph output by a seismograph. It is a record of the ground motion at a measuring station as a function of time. Seismograms typically record motions in three cartesian axes , with the z axis perpendicular to the Earth's surface and the x- and y- axes parallel to the surface...
s - Particle motion diagrams
- Vespagram-like trace summation
- Trace spectrum display