Surfseis Software SurfSeis software processes both active and passive seismic data to obtain shear-wave velocity (Vs) models, using the multichannel analysis of surface waves (MASW) method. Surface waves have historically been the bane of near-surface reflection seismologists. With MASW methodology development a global explosion in its research and use has come for application to engineering, groundwater, and environmental problems. The sixth generation (SurfSeis© 6.0 / 6.7) provides industry-leading features and capabilities. • Phase-shift method • HRLRT (for multi-modes and shorter spreads [higher lateral resolution]) • Inversion of four wave types for shear-wave velocity (Vs) • Fundamental mode • Higher modes • Bandpass and FK filters, Mute • AGC and trace-by-trace frequency spectra • Constrained inversion (fixed known model values, e.g., from wells) modififi ed interactively on 2D models. • Stitching dispersion-curve images, i.e., using preferred frequency ranges only interactively. • Attenuation measurement and inversion for Qs and conditionally Qp (optional feature, new in v6.4 and higher). • Advanced and friendly Kriging capabilities. • Horizontal axis remapping. Available versions: MAE s.r.l advanced geophysics instruments Zona Ind. Fresilia - 86095 Frosolone (I

- SurfSeis 6.0 is the standard SurfSeis software - SurfSeis 6.1 includes the Love-wave module - SurfSeis 6.2 includes the HRLRT module - SurfSeis 6.3 includes both Love-wave and HRLRT modules - SurfSeis 6.4 includes the Qs module - SurfSeis 6.5 includes the Love-wave and Qs modules - SurfSeis 6.6 includes the HRLRT and Qs modules - SurfSeis 6.7 includes all three modules Re.Mi / ESAC M.A.S.W. MAE s.r.l advanced geophysics instruments Zona Ind. Fresilia - 86095 Frosolone (IS)

MAE s.r.l advanced geophysics instruments Zona Ind. Fresilia - 86095 Frosolone (IS)