The system consists of a set of programs tied to the same database. With SEISAN it is possible using local and global earthquakes to enter phase readings manually or pick them with a cursor, locate events, edit events, determine spectral parameters, seismic moment, azimuth of arrival from 3-component stations and plot epicenters.
The SEISAN seismic analysis system is a complete set of programs and a simple database for analyzing earthquakes from analog and digital data.
CONTENTS OF PRO, LIB, INC, INF, COM, DAT, SUP, ISO and PIC DIRECTORIES. Programmers guide and some test programs. Programming in SEISAN and list of files in SEISAN distribution. Correlation of waveform signals, CORR and detection of event clusters XCLUST. Examples of maing response files from seismometers and accelerometer. Inversion of travel time data and joint hypocenter determination. Calculation of travel times for layer and gradient model, TTLAYER. IASPEI travel time software, program TTIM. Calculation and plotting of travel times. Detection program for continuous data, CONDET. Automatic phase picking, AUTO, AUTOPIC, AUTOSIG, CONDET. File conversion and modification programs. Updating final locations in database, UPDATE and UPD. Inserting events into the database, SPLIT. Extracting events from the database, COLLECT. GMAP, Plotting epicentres with Google maps or Google Earth. W_EMAP, Version Windows based map program. Distance trace plot with GMT, TRACE_PLOT (Unix only). Determine azimuth of arrival (3 comp or array) and component rotation. Instrument correction and magnitudes Ml, mb and Ms. Theoretical arrival times for global and local phases and location. Phase picking, amplitude, weight and polarity. Trace plotting, phase picking and spectral analysis, MULPLT. The Hypoinverse program, HYPINV (SUN and PC). Hypocenter location programs: HYPOCENTER, HYPO71 and HYPOINVERSE. Interactive work with earthquake locations, EEV command. Using SEISCONF to modify parameter files. Setting general SEISAN defaults, SEISAN.DEF. Default parameter files for the main programs. Database directories for your own system, MAKEREA. 
Moving data between Sun, Linux, MacOSX and Windows.
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