Example of PPV and other parameters measurement during the 2D seismics Svidnik, Medzilaborce & Snina - Slovakia.
Seismic energy sources were explosions in shallow drillholes and group of 4 vibrators.
We used line of 10 3D geophones PE-6 with natural frequency 4,8 Hz and with step of receiver 6 m. Geophone spread thou had length 54 m.
For evaluation of decay curve we made 4 shots with step 12,5 m and every shot was registered for 40 seconds (10 s before shot).
In the case of vibrator group there was the smallest distance of source to geophone array edge 4 m and then it was increased + 12,5 m every record. We registered 260 distances receiver - shot and we evaluated COMPLIANCE REPORTs (DIN4150) for every shot abd 3D geophone. Then we constructed graphs of decay curve - PPV and PPV/L3 (level 3 from DIN4150) with distance source - 3D receiver.
Accordingto this parameters we evaluated possibility of causation of damage of buildings near source profiles and determinated safe - non-hazardous distance Ds for various kinds of objects and seismic energy sources.