Bulletin KRASEC. Phys. & Math. Sci, 2015, V. 10, №. 1, pp. 39-48. ISSN 2313-0156
DOI: 10.18454/2313-0156-2015-10-1-39-48
MSC 86A15
HIGH-FREQUENCY ACOUSTIC EMISSION EFFECT
Yu. V. Marapulets
Institute of Cosmophysical Researches and Radio Wave Propagation Far-Eastern Branch, Russian Academy of Sciences, 684034, Kamchatskiy Kray, Paratunka, Mirnaya st., 7, Russia.
E-mail: marpl@ikir.ru.
Complex monitoring of acoustic emission (AE) in the sound frequency range has been carried out in the Kamchatka peninsular since 1999. In the course of the investigation, the existence of acoustic emission effect in sedimentary rocks was detected. It consists in the increase of geoacoustic radiation intensity in the frequency range from hundreds of hertz to the first tens of kilohertz during the growth of rock mass deformation rate. This effect was stably observed at several spaced stations and appears the most vividly at the final stage of earthquake preparation. During the acoustic emission effect, clear anisotropy of geoacoustic radiation directivity occurs which is determined by the source orientation of acoustic oscillations in the stress field of near surface sedimentary rocks.
Key words: acoustic emission, acoustic activity, acoustic emission directivity, deformation rate, high-frequency acoustic emission effect.
References
- Belyakov A.S., Nikolaev A.V. Seismoakusticheskie priemniki s magnitouprugim preobrazovatelem [Seismoacoustic receivers with magnetoelastic converter]. Fizika Zemli – Izvestiya. Physics of the Solid Earth, 1993, No. 7, pp. 74-80.
2. Rykunov L.N., Khavroshin O.B., Tsyplakov V.V. Apparatura i metody issledovaniya slabykh seismicheskikh effektov [Instumentation and methods for investigation of weak seismic effects]. Dep. V VINITI, No. 2919-78, 1978.
3. Belyakov A.S. Zemletryaseniya i podzemnyi zvuk [Earthquakes and underground sound]. Zemlya i Vselennaya — Earth and Universe, 1996, No. 2, pp. 23-29.
4. Levin B.V., Sasorova E.V., Borisov S.A. et.al. Otsenka parametrov slabykh zemletryasenii i ikh signalov [Estimation of parameters of weak earthquakes and their signals]. Vulkanologiya i seismologiya – Volcanology and Seismology, 2010, No. 3, pp. 60–70.
5. Kuptsov A.V., Marapulets Yu.V., Shevtsov B.M. Analiz izmenenii geoakusticheskoi emissii v protsesse podgotovki sil’nykh zemletryasenii na Kamchatke [Analysis of changes of geoacoustic emission during the preparation of strong earthquakes in Kamchatka]. Issledovano v Rossii – Investigated in Russia. 2004, V. 7, pp. 2809-2818, Available at: http://www.sci-journal.ru/articles/2004/262.pdf.
6. Paparo G., Gregori G.P., Coppa U., De Ritis R., Taloni A. Acoustic Emission (AE) as a diagnostic tool in geophysics. Annals of Geophysics. 2002. Vol.45. N. 2. P. 401-416.
7. Marapulets Yu.V., Shcherbina A.O. Metody issledovaniya prostranstvennoi anizotropii geoakusticheskoi emissii [The methods for study of spatial anisotropy of geoacoustical emission]. Tekhnicheskaya Akustika – Technical Acoustics, 2008, 14, 17 pp. Available at: http://ejta.org/archive/articles2008-marapuletz1.zip.
8. Voitenko E.A., Morgunov Yu.N. Eksperimental’nye issledovaniya rasprostraneniya impul’snykh akusticheskikh signalov v grunte [Experimental studies of the propagation of buried pulse acoustic signals in the ground]. Akusticheskiy Zhurnal – Acoustical Physics, 2011, V. 57, No. 1, pp. 73-74.
9. Gordienko V.A., Gordienko T.V., Kuptsov A.V., Larionov I.A., Marapulets Yu.V., Rutenko A.N., Shevtsov B.M. Geoakusticheskaya lokatsiya oblastei podgotovki zemletryasenii [Geoacoustic location of earthquake preparation regions]. Doklady Akademii Nauk, 2006, V. 407, No 5, pp. 669-672.
10. Gordienko V.A. Vektorno-fazovye metody v akustike [Vector-phase methods in acoustics]. Moscow, Fizmatlit, 2007, 480 p.
11. Shevtsov B.M., Marapulets Yu.V., Shcherbina A.O. O napravlennosti pripoverkhnostnoi vysokochastotnoi geoakusticheskoi emissii v periody deformatsionnykh vozmushchenii [The direction of near surface high-frequency geoacoustic emission during deformation disturbances]. Doklady Akademii Nauk, 2010, V. 430, No. 1, pp. 119-122.
12. Marapulets Yu.V., Shevtsov B.M., Larionov I.A., Mishchenko M.A., Shcherbina A.O., Solodchuk A.A. Otklik geoakusticheskoi emissii na aktivizatsiyu deformatsionnykh protsessov pri podgotovke zemletryasenii [Geoacoustic emission response on activation of deformation processes during earthquake
preparation]. Tikhookeanskaya geologiya – Russian Journal of Pacific Geology, 2012, V. 31, No. 6, pp. 59-67.
13. Marapulets Yu.V., Shevtsov B.M. Mezomasshtabnaya akusticheskaya emissiya [Mesoscale acoustic emission]. Vladivostok, Dal’nauka, 2012, pp. 126.
14. Larionov I.A., Marapulets Y.V., Shevtsov B.M. Features of the Earth surface deformations in the Kamchatka peninsula and their relation to geoacoustic emission. Solid Earth. 2014. N. 5. P. 1293-1300.
Original article submitted: 15.04.2015
Marapulets Yuri Valentinovich – Ph.D. (Tech.), Associate Professor, Deputy Director for Science Institute of Space Physics Research and Radio Wave Propagation FEB RAS, Professor of Dep. computer science Vitus Bering Kamchatka State University.
Download article Marapulets Y.V.