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Basics of rotational seismology - NGEO105

Title:	Základy rotační seismologie
Guaranteed by:	Department of Geophysics (32-KG)
Faculty:	Faculty of Mathematics and Physics
Actual:	from 2013
Semester:	summer
E-Credits:	3
Hours per week, examination:	summer s.:2/0, Ex [HT]
Capacity:	unlimited
Min. number of students:	unlimited
4EU+:	no
Virtual mobility / capacity:	no
State of the course:	taught
Language:	Czech, English
Teaching methods:	full-time
Teaching methods:	full-time

Guarantor:	doc. RNDr. Johana Prokop Brokešová, CSc.

Opinion survey results Examination dates SS schedule Noticeboard

Annotation -

Last update: T_KG (06.05.2013)

Rotational seismology is a new developing seismological discipline which, in contrast to classical approach based on measuring of translational motions, deals with rotational ground motions. Main topics of the lecture are: history of the investigation of rotational components, basics of the theory of elasticity and curl of seismic wave field, numerical modeling of seismic rotations in simple structures, measurements of seismic rotations, generating of rotations by an anthropogenic source, rotational seismograms and matching the rotation and translation waveforms, structural and source effects.

Aim of the course -

Last update: T_KG (03.05.2013)

Acquiring knowledge of rotational seismology, methods of measuring of seismic rotations and their basic seismological applications.

Course completion requirements -

Last update: prof. RNDr. František Gallovič, Ph.D. (10.06.2019)

Oral exam

Literature - Czech

Last update: T_KG (03.05.2013)

R. Teisseyre, M. Takeo, and E. Majewski (Eds.), Earthquake Source Asymmetry, Structural Media and Rotation Effects, Springer-Verlag Berlin Hoedelberg, 2006

Bull. Seis. Soc. Am, Vol 99, No. 2B, 2009, special issue on Rotational Seismology and Engineering Applications

J. Seismol, Vol 16, No. 4, 2012, special issue on Advances in Rotational Seimology: Instrumentation, Theory, Observations, and Engineering

Teaching methods -

Last update: T_KG (03.05.2013)

Lecture

Syllabus -

Last update: T_KG (06.05.2013)

History of the investigation of seimic rotational motions

discussion of possible rotational motion manifestation on certain structures for present-

time and historical earthquakes

Basics of the theory of elasticity and curl of seismic wave field

tensor of small rotations, curl of seismic displacement field, influence of the earth‘s

surface

Numerical modeling of seismic rotations in simple structures

wavefields simulations in homogeneous or gradient media for a double couple or center

of rotation point source

Ring laser measurements of seismic rotation

basic principle, examples of rotational seismograms

Determination of seismic rotation from small-aperture arrays

ADR (Array Derived Rotation) method, basic principle, conditions of applicability,

accuracy estimates

Direct measurements of seismic rotation by point sensors

new types of rotational sensors and basic measurement principles, Rotafon - a six-

degree-of-freedom seismic sensor (patent FMP CU), in-situ calibration

Generator of seismic rotational motions

repeatable source generating SH waves and rotational motions, signal stacking, linear

and non-linear summing method

Rotational seismograms and matching the rotation and translation waveforms

waveform analogy between rotation rate and translational velocity, quantification of

rotational amplitudes by the Rotation-to-Translation-Ratio (RTR), frequency

dependence of RTR, RTR depencence on other parameters

Structural effects in rotation seismic wavefield

phase velocity determination

Source effects in rotation seismic wavefield

determination of focal mechanism