Seismic Geophone - Overburden or Upper Layer Depth:
Overburden or Upper Layer Depth:

Intersection Point Distance:

Overburden or Upper Layer Seismic Velocity:

Bedrock or Lower Layer Seismic Velocity:

where,
t = Overburden or Upper Layer Depth,
d = Intersection Point Distance,
v
1 = Overburden or Upper Layer Seismic Velocity,
v
2 = Bedrock or Lower Layer Seismic Velocity.