Description

Surface waves are easy to record and loaded with information about the subsurface. With SeisImager/SW, data processing is simple, putting the answers you seek at your fingertips.

SeisImager/SW includes both active source and passive source data analysis capability. The higher frequency data from a sledgehammer source that travels through shallower depths can be combined with lower frequency data from microtremors that travel through greater depths. Combine the results for one high-resolution plot of S-wave velocity.

Upon launching the software, a wizard walks you through the data analysis. SeisImager/SW includes default parameters that are suitable for most cases, but are fully user-adjustable as needed.

In addition to the main functions used to determine Vs, SeisImager/SW also allows the user to build models and examine the effects of velocity variations. Borehole data such as P-wave velocities and blow counts (N-values) can also be correlated.

SeisImager/SW Software Packages

  • Demonstration version: for use on Windows PC with mouse, may be launched 15 times, capable of 1D active source Multi-channel Analysis of Surface Waves (MASW).
  • 1D version: runs on Windows PC with mouse, capable of passive source Microtremor Array Measurements (MAM) and 1D MASW.
  • 2D version: runs on Windows PC with mouse, capable of MAM and 1D and 2D MASW.
  • Rental version: runs for 40, 75, or 250 hours on Windows PC with mouse, capable of MAM and 1D and 2D MASW. Also includes the refraction data analysis package, SeisImager/2D Standard.

Features and benefits

  • Calculates phase velocity and automatically picks dispersion curve
  • Performs inversion to iteratively seek 1D S-wave velocity (Vs) curve or 2D Vs cross-section
  • Allows active and passive source dispersion curves to be combined for a high-resolution result over all depths sampled
  • Flexible geometry options suit a wide range of site configurations and conditions
  • Analysis based on robust methods: frequency domain tau-p, CMP cross-correlation for active source Multi-channel Analysis of Surface Waves (MASW); Spatial Autocorrelation (SPAC) for passive source Microtremor Array Measurements (MAM)
  • Includes editing and QC functions, and velocity modeling