Seismic Survey
A mobile geophysics puzzle where tapping fires a seismic hammer blow. Arrival times at a line of geophones plot live on a time-distance graph; you read the slope changes and crossover distances to infer layer velocities and depths, then drag boundaries onto a cross-section to record your interpretation and compare it against the true subsurface across twelve models, including one undetectable velocity inversion.
Created by haojie.huang
