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bradlipovsky/napkin-dv.py

Created March 15, 2022 21:55
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dV Back of the envelope
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napkin-dv.py
dx_apparent = 14 # Known source-receiver distance
vtrue = 6e3 # Known p-wave speed
t0 = 380/48e3 # Measured travel time
dt = (5/48e3) # Measured travel time change
dx_true = t0 * vtrue # Actual propagation path >> source-receiver distance
print('True propagation path length: %f'%dx_true)
v1 = dx_true/t0
v2 = dx_true/(t0-dt)
dv = (v2 - v1)/v1
print('Velocity change: %f'%dv)
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