Geogiga Microtremor 9.3 — Microtremor Observation Analysis Software

MICROTREMOR uses spectrum analysis to get the predominant period and frequency of a site from ground motions. The amplitude or power spectrum and H/V spectral ratio can be plotted together.



  • Select and analyze time segments
  • Analyze amplitude or power spectrum
  • Calculate and display H/V spectral ratio
  • Calculate the overburden thicknessnew
  • Butterworth and Ormsby filters with band pass, low pass, high pass, band reject, and notch options
  • Undo and redo multi-step processing on seismic data
  • Support SEG-2, SEG-Y, SEG-D, ASCII, SAF, MiniSEEDnew, and other data formats
  • Output predominant period and frequency to a text file
  • Print and save data images produced