Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Web of Science (1) Citing Articles via Google Scholar Google Scholar Articles by Alekseev, A. S. Articles by Korneev, V. A. Search for Related Content GeoRef GeoRef Citation

Powerful Low-Frequency Vibrators for Active Seismology

¹ Institute of Computational Mathematics and Mathematical Geophysics
Siberian Branch of Russian Academy of Sciences
Lavrentieva pr., 6
630090, Novosibirsk, Russia
alekseev{at}sscc.ru
 (A.S.A.)

² Institute of Geophysics
Siberian Branch of Russian Academy of Sciences
Koptuga pr., 3
630090, Novosibirsk, Russia
iro{at}online.sinor.ru
 (I.S.C.)

³ Lawrence Berkeley National Laboratory
1 Cyclotron Road
Berkeley, California 94720
VAKorneev{at}lbl.gov
 (V.A.K.)

In the past two decades, active seismology studies in Russia have made use of powerful (40- and 100-ton) low-frequency vibrators. These sources create a force amplitude of up to 100 tons and function in the 1.5–3, 3–6, and 5–10 Hz frequency bands. The mobile versions of the vibrator have a force amplitude of 40 tons and a 6–12 Hz frequency band. Recording distances for the 100-ton vibrator are as large as 350 km, enabling the refracted waves to penetrate down to 50 km depths. Vibrator operation sessions are highly repeatable, having distinct "summer" or "winter" spectral patterns. A long profile of seismic records allows estimation of fault zone depths using changes in recorded spectra. Other applications include deep seismic profiling, seismic hazard mapping, structural testing, stress-induced anisotropy studies, seismic station calibration, and large-structure integrity testing. The theoretical description of the low-frequency vibrator is given in the appendices, which contain numerical examples.