U.S. GEOLOGICAL SURVEY DIGITAL DATA SERIES DDS-7



                    DIGITIZED STRONG-MOTION ACCELEROGRAMS 

                       OF NORTH AMERICAN EARTHQUAKES

                                1933 - 1986





                               README.1ST FILE



       The DSMA CD-ROM (Compact Disc-Read Only Memory) has been produced 

       in accordance with the ISO 9660 CD-ROM Standard and is therefore 

       capable of being read on any computing platform that has 

       appropriate CD-ROM driver software installed.  However, the 

       access software used on the DSMA disc (called ACATALOG) currently 

       executes only under DOS on IBM or compatible personal computers. 



       The structure of the DSMA data on the disc is very SIMPLE.

       All data files are delimited ASCII. 



       Several DOS subdirectories are contained on the DSMA CD-ROM. 

       Their names and the information they contain are listed below:



       \DOCFILES - This subdirectory contains the ASCII document files 

       for the DSMA CD-ROM.  These files include:



            AUTHORS.DOC - This file lists the authors of this Digital 

            Data Series CD-ROM.



            ACKNOWL.DOC - This file provides acknowledgments of the 

            producers of this CD-ROM disc as well as of the sources of 

            the data contained on this disc.



            CONTACTS.DOC - This file provides a list of contacts for 

            additional information on this CD-ROM, the U.S. Geological 

            Survey's CD-ROM Support Center, and the data contained on 

            this disc.



            DISCLAIM.DOC - This file contains the Government's 

            disclaimer for this CD-ROM.



            OVERVIEW.DOC - This file provides a brief overview of the 

            data and software contained on this CD-ROM, including the 

            type and extent of data coverage. 



            REFERENC.DOC - This file cites the references used in the 

            production of this CD-ROM. 



            REGISTER.DOC - This file contains a registration form by 

            which a user can elect to receive announcements of new CD-

            ROM releases and of updates to previous releases. This form 

            also provides a vehicle for suggestions and feedback to the 

            USGS on the current disc.



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            TECHINFO.DOC - This file provides in-depth technical 

            information on the data contained on the disc. Detailed 

            information on data collection methods and procedures is 

            also included. Individual data elements are defined and 

            coded values are explained.



            GETSTART.DOC - This file contains a step-by-step explanation 

            of the use of the ACATALOG access software.  Once this brief 

            tutorial exercise has been completed, the user should have a 

            good working knowledge of how to select, display, and output 

            data from this CD-ROM.



       \DOSMENU - This subdirectory contains all the software required 

       to support the menu system used when running under a DOS system. 

       This menu system is typically invoked by issuing the command 

       'DSMA' from the user's root directory.



       \SOFTWARE - This subdirectory contains the executable version of 

       the ACATALOG software and index files.



                                  DISCLAIMER



       This Compact Disc-Read Only Memory (CD-ROM) publication was 

       prepared by an agency of the United States Government.  Neither 

       the United States Government nor any agency thereof, nor any of 

       their employees, make any warranty, expressed or implied, or 

       assumes any legal liability or responsibility for the accuracy, 

       completeness, or usefulness of any information, apparatus, 

       product, or process disclosed in this report, or represents that 

       its use would not infringe privately owned rights.  Reference 

       therein to any specific commercial product, process, or service 

       by trade name, trademark, manufacturer, or otherwise does not 

       necessarily constitute or imply its endorsement, recommendation, 

       or favoring by the United States Government or any agency 

       thereof.  Any views and opinions of authors expressed herein do 

       not necessarily state or reflect those of the United States 

       Government or any agency thereof.



       Although all data and software published on this CD-ROM have been 

       used by the USGS, no warranty, expressed or implied, is made by 

       the USGS as to the accuracy of the data and related materials 

       and/or the functioning of the software. The act of distribution 

       shall not constitute any such warranty, and no responsibility is 

       assumed by the USGS in the use of this data, software, or related 

       materials.  Errors and inconsistencies for concentration units 

       other than parts per billion (ppb), sample type coding, sample 

       location, and the like are known to exist.











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                                 Non-DOS Users



       The ACATALOG software currently only runs in a DOS  

       environment. If  you are  interested  in  obtaining the C source  

       code  for  ACATALOG, please contact the CD-ROM Support Center, 

       U.S. Geological Survey, 964 BOX 25046, Denver Federal Center,

       Denver, Co. 80225-0046.



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