Wavefront distortion and healing in an underground ore mine
From Geosciences The Department of Geosciences, Princeton on November 8th, 2017
Video Description: The video shows an interaction of a wavefront generated by a microearthquake with the complicated structure of the orebody and mined-out voids in an underground mine, Pyhaesalmi mine in Finland, one of the deepest mine in Europe. The voids represent low-velocity zones and are obstacles to the wavefront. In the video, the left panel shows the wavefront and mine structure. The right panel shows the wavefront alone for clarity. The red dot represents the microearthquake location. Initially, the wavefront propagates undisturbed. The wavefront is severely distorted as it hits the obstacles. It traverses slowly and goes around the obstacles. It gradually heals afterwards and advances. Ironically, this beautiful phenomenon conveys a powerful message too. We all face many obstacles in life. We must find a way around or must overcome the obstacles. We get wounded and our belief distorted, but we must heal ourselves and move forward!