Question

In one technique, traces of these phenomena recorded at regularly spaced offsets are collected into a common midpoint gather. Adam Dziewoński (“zhuh-VON-skee”) and Don Anderson used observations of these phenomena and astronomical measurements to develop the PREM (“P-R-E-M”), which calculates density from the velocity of these phenomena using the Adams–Williamson (10[1])equation. Primordial thermochemical piles are one of many proposed mechanisms for the strange behavior of these phenomena at antipodal (“an-TIH-puh-dal”) regions near Africa and the Pacific ocean called LLSVPs. Images reconstructed using these phenomena confirmed the natural formation of post-perovskite. The velocities of these phenomena change abruptly at a depth of 660 kilometers, below which ringwoodite decomposes, as well as at the Moho discontinuity. For 10 points, name these phenomena whose propagation is used to study the Earth’s interior. ■END■

ANSWER: seismic waves [or body waves; or surface waves; accept P waves or primary waves; accept S waves or secondary waves; prompt on earthquakes by asking “what phenomena are generated by earthquakes?”; prompt on waves] (The first sentence refers to reflection seismology. PREM stands for Preliminary Reference Earth Model. LLSVPs are large low-shear-velocity provinces.)
<Other Science>
= Average correct buzz position

Buzzes

PlayerTeamOpponentBuzz PositionValue
Alex LiGeorgia Tech AChicago A4710

Summary

2023 ACF Nationals04/22/2023Y1100%0%0%47.00