Easy HVSR – Software for HVSR processing

590.00 esc. IVA

Easy HVSR allows the analysis of the spectral ratio of microtremors recorded with a single-station. The simplicity of use and speed of execution of the calculations allow the user to get immediate results in the estimation of: resonance frequency, stratigraphic profile and equivalent shear wave velocity Vs30, all according to the guidelines suggested by the SESAME project.

The software imports SEG2, SAF and ASCII files.

 

Descriere

Customizing analysis
The user can choose different ways in which process the data, choosing the more appropriate methods for the directional sum of the traces in the horizontal directions, for the smoothing and for the frequency band to be analyzed. Among the directional sums available the user can choose from the most simple arithmetic mean to the amean square or geometric mean. Among the methods for data smoothing suggested by the SESAME project can be chosen: Konno & Ohmachi, Triangular constant and Triangular proportional. The user can choose the time windows to include or exclude with a simple checkmark, seeing in real time the changes made. The input data can be automatically filtered.

Displaying Data
All results are displayed in customizable charts. The available charts are: the traces in the three directions analyzed with the representation of the time windows chosen; the average spectrum of the traces; the map for the verification of the recording’s stationarity; the map for the verification ot the recording’s directional isotropy; the spectral ratio H/V with its confidence interval, having the with possibility to overlap the ellipticity curve of more stratigraphic models not only of the fundamental mode but also higher ones; he graphical representation of the stratigraphic profile; the velocity profile associated with the stratigraphy.

Results
The software automatically evaluates a first estimate of the stratigraphic model that best approximates the H/V spectral behavior recorded in situ and analyzed so the user can refine it with greater rapidity.Is thus obtained, in addition to the natural vibration frequency of the stratigraphy typical to HVSR technique, the immediate assessment of Vs30 and of the shear wave velocity profile of the stratigraphic model assumed. On the chart of the spectral ratio H/V are visible, in addition to the H/V curve with its confidence interval, all the ellipticity curves of the of the various modes of each stratigraphic model that the user can decide to add. In this way it is possible to compare the differences from a qualitative point of view, and in addition also a quantitative comparison with the estimate the mismatch function between the ‘fundamental’ ellipticity curve and the curve of the spectral ratio H/V. All accompanied by the checks on the reliability of the H/V curve and its peak suggested by the SESAME project.

ChangeLog

2018.24.4.633

30/09/2018

Optimization search algorithm resonance frequency

VERSION 2016

  • Implmented Bing Maps for locations.
  • Added support to make the application independent from the international options and language defined within the Control Panel of Windows. The software will use, however, the point as a decimal point and comma for digit grouping.
  • Improvement of drawings export in the final report.
  • Introduced an improvement in the calculation of smoothing with the techniques Triangular constant, Triangular proportional and Moving average.
  • Improved the processing with customed duration windows.
  • Implemented the import of drm format files.
  • Implemented the export of the stratigraphy in .edp files.
  • Implemented the possibility to contact GeoStru Staff directly from the software.
  • Implemented the export of the H/V spectrum in csv format to be used for comparisons with various acquisitions.
  • Improvement in the management of the graphics of the H/V spectra.
  • Improvement in the management of the inversion models.
  • Improvement in the export of H/V graphics for the print reports.
  • Improved the import of SEG2 files.
  • Implementation of an autonomous system of notification and download of upgrades.
  • Added new functions for editing the computation report.
  • Ability to change the display scale for the graphics of given traces.
  • Optimization of SEG2 file import.
  • Optimization of trace import from saf files.
  • Display of the coordinates of the H/Vspectral ratio points in the corresponding graphic.

2018.23.4.533

07/07/2018

VERSION 2016

  • Implmented Bing Maps for locations.
  • Added support to make the application independent from the international options and language defined within the Control Panel of Windows. The software will use, however, the point as a decimal point and comma for digit grouping.
  • Improvement of drawings export in the final report.
  • Introduced an improvement in the calculation of smoothing with the techniques Triangular constant, Triangular proportional and Moving average.
  • Improved the processing with customed duration windows.
  • Implemented the import of drm format files.
  • Implemented the export of the stratigraphy in .edp files.
  • Implemented the possibility to contact GeoStru Staff directly from the software.
  • Implemented the export of the H/V spectrum in csv format to be used for comparisons with various acquisitions.
  • Improvement in the management of the graphics of the H/V spectra.
  • Improvement in the management of the inversion models.
  • Improvement in the export of H/V graphics for the print reports.
  • Improved the import of SEG2 files.
  • Implementation of an autonomous system of notification and download of upgrades.
  • Added new functions for editing the computation report.
  • Ability to change the display scale for the graphics of given traces.
  • Optimization of SEG2 file import.
  • Optimization of trace import from saf files.
  • Display of the coordinates of the H/Vspectral ratio points in the corresponding graphic.

01/01/1970

01/01/1970

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