The Rotational Motions in Seismology (ROMY) instrument is a giant laser gyroscope used to generate extremely precise 3D rotation measurements of planet Earth. However at the end of the video below they mention that "seismologists want to..." use small laser gyros to measure seismic tilt motion as part of earthquake monitoring.
Is there a lot of interest in this? Have compelling questions been identified that could be address by adding tilt motion to translational motion monitoring, or is it a case of nobody's looked, there might be something interesting there, better find out?