Getting started with Shakyground

SHAKYGROUND provides a modern graphical user interface for the input and the visualization of the results. A particular feature is its powerful data base engine for the storage and access of the input and output data. All these nice things, together with the efforts of the numerical processing, require that you should have a bit more than a pocket calculator, i. e.,

  • 1Gb RAM or more
  • 50 MB free space on your HDD
  • a Modern Processor
  • Microsoft Windows operating systems (all version)

SHAKYGROUND uses data base engine for the handling of the input and output data. In order to access the data bases outside SHAKYGROUND, in particular the model data base where also the results are stored, you should have MS Access or MS Excel. Note that the input/output strategy has been chosen for reasons of the ease and security of data handling.

As the input/output of SHAKYGROUND is strongly related to the use of data bases, there will be two more files, e. g.

“catalog.cat” (storage of input parameter sheets)

“Simul.mdb” (storage of model input parameters and georeferenced results)

where the input parameters and the results are stored. These files reside on the same directory as the program itself. Yon may access these files using Microsoft Access. If you are an inexperienced user please avoid to modify these files outside SHAKYGROUND. Note that at the end of each session you also have the possibility to write your results, i. e., response spectra and signal parameters, to an ASCII file which you can easily export to other programs for further processing.
During run time SHAKYGROUND creates a number of files reporting the processing status, on the subdirectory “Elaboration”. The files are named “SIMERR”, “Simul.log”, and “SIMSTATUS” and can be read with any type of ASCII-editor. The files “SIMERR” and “Simul.log” are devoted for trouble-shooting purposes. They serve to check the proper operation of SHAKYGROUND’s numerical processing unit and should be of little interest for the user. The file “SIMSTATUS” consists of a single line with the number of the simulation actually processed. It may be useful for checking the progress of processing. In case of trouble MESTOR may ask you to provide these ASCII files.
If the user decides to save single seismograms or response spectra SHAKYGROUND will create the corresponding files on the subdirectories “Elaboration \ Results NNN”. The seismograms are named “acc.???”, “vel.???”,”disp.???” and “wa_sim.???”, where “???” is the number of the simulation during which the trace was created. “acc” stands for “ground acceleration”, “vel” for “ground velocity”, “disp” for “ground displacement”. “wa_sim” is the response of a WOOD-ANDERSON seismometer to the ground displacement seismogram. The single response spectra are named “rsp.???”, with “???” being the number of corresponding simulation as stated above.
There will also be small files “S_INFO” and “R_INFO” with some basic header information concerning the single seismograms and response spectra. You better don’t alter these files.