Continuous Surface Wave — Interactive Widget

Sliders: frequency, phase velocity, geophone spacing and first geophone offset. Main plot shows source, surface wave and 6 geophones; panels show each geophone's local sine & dial. Bottom plots show wrapped (degrees) and unwrapped phase with best-fit.

Frequency (Hz)

Value: 50.0 Hz

Phase velocity (m/s)

Value: 200 m/s

Geophone spacing (m)

Value: 0.75 m

First geophone offset (m)

Value: 5.00 m

Wavelength: — m

First sensor distance: — m

Dashed lines (below):
red: Nyquist (lower bound on phase angles),
green: First geophone must be > λ/5 form source (upper bound on phase angles)
blue: Full must span >λ/4 (upper bound on phase angles)

1) Phase (wrapped) vs distance

Y axis: phase in degrees (0–360). Dashed red/green lines indicate Nyquist / 5× distance gradients.

2) Phase (unwrapped) vs distance + best fit

Best-fit line slope = gradient (deg/m). Estimated λ = 360° / gradient.