SOFTWARE INFORMATION FORM

Contributor Name: Alan L. Jones
	
Institution: SUNY Binghamton

Email address: jones@sunquakes.geol.binghamton.edu
 	
Program Name: evt2sac

Version Number: 1.0 Level 07 August 1991

Distribution Date: 1993/08/12
 
Description:  extracts seismic data from CD-ROMs distributed by the
  National Earthquake Information Center (NEIC) of 
  the United States Geological Survey (USGS) and converts 
  it to a form compatible with the Lawrence Livermore
  National Laboratory Seismic Analysis Code (SAC).
	

Details:  The National Earthquake Information Center distributes event
  waveforms on CD-ROMS.  The evt2sac program extracts the waveforms and 
  converts them to SAC format. A profile specifies the parameters used 
  by the program.  The user can specify the time of the event of interest
  and also specify range and lag time to extract only records of interest.
  In addition, it is possible to specify that the program extract data
  around the arrival time of a phase.  For example, one could specify that
  the data should extend from one minute before the arrival of the P wave
  and run until five minutes after the arrival of the S wave.  
  The phases supported are P, S, pP, sS, PP, SS and surface waves.  When
  specifying surface waves, the user can provide a surface wave group velocity
  window.

Associated Programs:  A program called INDEX is available from the author
  to display the index of a CD-ROM.  This program is designed for use
  with SunView.
	
Computer and OS:  Sun, any level of Unix	

Special Hardware or Other Software Needed: CD-ROM reader

______________________________________________________________

Distribution Contains: 

	evt2sac source code written in C
	makefile
	J-B tables for phase arrivals
	evt2sac.man manual page
	example profile

	DESIRABLE (Answer Yes or No )
		Detailed Reference Manual: Yes
		Tutorial Text: No		
		Tutorial Code or script: No	
		Source Code: Yes 	
		Makefile: Yes			
		Special or extra libraries: 
			"glue" routines to interface
			between C and FORTRAN

	INSTALLATION INSTRUCTIONS
		 1. tar xfv seismic.tar
		 2. You will now have a sub-directory called c2s
		 3. cd c2s
		 4. Edit makefile to indicate where you have
		    the SAC libraries
		 5. make
		 6. Edit the file evt2sac.pro to match your
		    requirements and the path of the CD-ROM.
		 7. run evt2sac
		 8. You should have created SAC files