Summary
Over the last 40 years ring laser gyroscopes became one of the most important instruments in the field of inertial navigation and precise rotation measurements. They have a high resolution for angular velocities, a very good scale factor stability and a wide dynamic range. These properties made them suitable for aircraft and autonomous submarine navigation. Over the last decade we have developed several very large perimeter ring laser gyroscopes for the application in geodesy and geophysics (Schreiber et al., 2001). Because of a substantial upscaling of these ring lasers, their sensitivity to rotations has been increased by at least 5 orders of magnitudes. At the same time the instrumental drift was reduced by about the same amount. This progress in rotational sensor technology led to the successful detection of rotational signals caused by earthquakes (Pancha et al., 2000) several thousands kilometers away. These observations stimulated the development of a highly sensitive ring laser gyro for specific seismological applications. The GEOsensor provides rotational motions along with the usual translational motions at a high data acquisition rate of at least 20 Hz. Observations of seismic induced rotations show that they are consistent in phase and amplitude with the collocated recordings of transverse accelerations obtained from a standard seismometer over a wide range of distances and frequencies.
Key words
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Aki, K., Richards, P. G. (2002) Quantitative Seismology, 2nd Edition, University Science Books
Aronowitz, F. (1971) The laser gyro. Laser applications, Vol. 1, edited by M. Ross, 133–200, Academic Press, New York
Bouchon, M., and Aki, K. (1982) Strain, tilt and rotation associated with strong ground motion in the vicinity of earthquake faults. Bull. Seismol. Soc. Amer., 72:1717–1738
Cochard, A., Igel, H. (2003) What can rotational measurements teach us about earthquake rupture histories? Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract S42D-0200
Cochard, A., Igel, H. (2004) What can rotational measurements teach us about earthquake rupture histories? Geophysical Research Abstracts (EGU Meeting), 6, 06359
Cochard, A., Igel, H., Flaws, A., Schuberth, B., Wassermann, J., Suryanto, W. (2005) Rotational motions in seismology, in preparation, to be published in “Earthquake source asymmetry, structural media and rotation effects” eds. Teisseyre et al., Springer Verlag
Igel, H., Nissen-Meyer, T., Jahnke, G. (2002) Wave propagation in 3-D spherical section: effects of subduction zones, Phys. Earth. Planet. Int., 132:219–234
Igel, H., Flaws, A., Velikoseltsev, A., Cochard, A., Schreiber, K. U. (2004) Comparison of rotational and translational motions induced by distant large earthquakes, Geophysical Research Abstracts (EGU Meeting), 6, 06487
Igel, H., Schreiber, K. U., Flaws, A., Schuberth, B., Velikoseltsev, A. Cochard, A. (2005a) Rotational motions induced by the M8.1 Tokachi-oki earthquake, September 25, 2003, Geophys. Res. Lett., VOL. 32, L08309, doi:10.1029/2004GL022336
Igel, H., Cochard, A., Schuberth, B., Flaws, A. Velikoseltsev, A., Schreiber K. U. (2005b) Rotational ground motions: a new observable for seismology? Geophysical Research Abstracts (EGU Meeting), 7
Komatitsch, D., Tromp, J. (2002a) Spectral-element simulations of global seismic wave propagation, Part I: Validation, Geophys. J. Int., 149:390–412
Komatitsch, D., Tromp, J. (2002b) Spectral-element simulations of global seismic wave propagation, Part II: 3-D models, oceans, rotation, and gravity, Geophys. J. Int., 150:303–318
McLeod, D. P., Stedman, G. E., Webb, T. H., Schreiber K. U. (1998) Comparison of standard and ring laser rotational seismograms, Bull. Seism. Soc. Amer., 88:1495–1503
McLeod, D. P., King, B. T., Stedman, G. E., Schreiber, K. U., and Webb T. H. (2001) Autoregressive analysis for the detection of earthquakes with a ring laser gyroscope; Fluctuations and Noise Letters, Vol. 1, No. 1:R41–R50
Mikumo, T., Aki, K. (1973) Determination of local phase velocity by intercomparison of seismograms from strain and pendulum instruments, J. Geophys. Res., 69: 721–731
Pancha, A., Webb, T.H., Stedman, G. E., McLeod, D.P., and Schreiber, U. (2000) Ring laser detection of rotations from teleseismic waves. Geophys. Res. Lett, 27:3553–3556
Schreiber, U., Schneider, M., Rowe, C.H., Stedman, G. E., and Schlüter, W. (2001) Aspects of Ring Lasers as Local Earth Rotation Sensors. Surveys in Geophysics, Vol. 22:(5–6) 603–611
Schreiber, U., Velikoseltsev, A., Stedman, G. E., Hurst, R. B., Klügel, T. (2004) Large Ring Laser Gyros as High Resolution Sensors for Applications in Geoscience. Proceedings of the 11th International Conference on Integrated Navigation Systems, St. Petersburg, 326–331
Schuberth, B., Igel, H., Wassermann, J., Cochard, A., Schreiber, K. U. (2004) Rotational Motions from Teleseismic Events-Modelling and Observations, Eos Trans. AGU, Fall Meet. Suppl. Abstract S42D-0200
Stedman, G. E., Li, Z., Bilger, H. R. (1995) Sideband analysis and seismic detection in large ring lasers. Appl. Opt., 34:7390–7396
Stedman, G. E. (1997) Ring laser tests of fundamental physics and geophysics. Rep. Progr. Phys. 60:615–688
Takeo, M., Ito, H. M. (1997) What can be learned from rotational motions excited by earthquakes? Geophys. J. Int., 129:319–329
Takeo, M. (1998) Ground rotational motions recorded in near-source region of earthquakes, Geophys. Res. Lett., 25:789–792
Trifunac, M. D., Todorovska, M. I. (2001) A note on the usable dynamic range of accelerographs recording translation, Soil Dyn. Earth. Eng., 21(4):275–286
Wielandt, E. (1993) Propagation and structural interpretation of non-plane waves, Geophys. J. Int., 113: 45–53
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2006 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Schreiber, U. et al. (2006). The GEOsensor Project: Rotations — a New Observable for Seismology. In: Flury, J., Rummel, R., Reigber, C., Rothacher, M., Boedecker, G., Schreiber, U. (eds) Observation of the Earth System from Space. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-29522-4_28
Download citation
DOI: https://doi.org/10.1007/3-540-29522-4_28
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-29520-4
Online ISBN: 978-3-540-29522-8
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)