ESTIMATION OF LONG-RANGE CORRELATION SCALES BY SEISMOACOUSTIC EMISSION SIGNALS OF NEAR-SURFACE SEDIMENTARY ROCKS IN KAMCHATKA

• Published in: Вестник КРАУНЦ. Физико-математические науки
• Main Authors: V. N. Sychev, M. A. Mishchenko, S. A. Imashev, M. E. Cheshev
• Format: Article in Journal/Newspaper
• Language: English; Russian
• Published: KamGU by Vitus Bering 2019
• Subjects: geoacoustic noise; structural functions; autocorrelation; correlation scales; self-similarity; Science; Q; Karymshina; Kamchatka
• Online Access: https://doi.org/10.26117/2079-6641-2019-29-4-190-200; https://doaj.org/article/aeee69989fc849c9b7528aeb6e2c0a34

A measurement complex is installed on the ground surface at «Karymshina» complex geophysical observation site of IKIR FEB RAS (Kamchatka) to record seismoacoustic emission signals. A three-component piezoceramic seismic receiver, which records oscillatory acceleration in the frequency range from 0.2 to 400 Hz, is used as the signal sensor. A series of seismoacoustic responses on regional earthquakes of 2017-2018 with the energy class Ks > 11:0 has been considered. Self-similarity of their structures has been established in a limited interval of time scales by statistical methods. That, in its turn, indicates the presence of long-range correlations in the system under consideration and allows one to estimate correlation scales.