Seismic instruments: article

Rotational seismology. Review of achievements and outlooks
1 Institute of Earthquake Prediction Theory and Mathematical Geophysics, Russian Academy of Sciences
2 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Journal: Seismic instruments
Tome: 56
Number: 3
Year: 2020
Pages: 5-25
UDK: 550.344.094.93:550.34.038.8
DOI: 10.21455/si2020.3-1
Аnnotation file
Bibliographic list
Keywords: seismic rotations, tilts, rotation rate sensors, ring laser gyros, small-aperture antennas, fiber-optical gyros, molecular-electronic sensors, connection of rotational and translational movements, Cosserat theory
Аnnotation: Rotational seismology is a relatively new area of science. Rotational seismology could be applied in a wide range of seismology disciplines, including strong-motion and broadband seismology, earthquake engineering, earthquake physics, seismic instrumentation and seismic hazards. Rotational seismology is also of interest to physicists conducting research in Earth-based observatories for detecting gravitational waves. Modern acquisition technology, such as fiber-optical or ring laser gyros, allow the actual observation of rotational movements, these observations are becoming consistent with collocated recordings of translational ground motions. However, often even seismologists have questions: What does rotational seismology mean, what hardware it rely on, what can it give now and what can it achieve? How could measurements of rotational ground motions be applied to traditional seismology and related fields in the Earth Sciences? The study of rotational movements at teleseismic distances in the near field of engineering seismology requires different approaches, different equipment and methods. In this review, we have decided to briefly highlight these issues focusing on the prospects for future research and on seismic instruments used in rotational seismology.