B. G. Gorshkov, D. A. Ilinskiy, D. E. Simikin, M. A. Taranov
{"title":"2021年8月25日至11月30日部署在黑海海底的分布式光纤声传感器（DAS）地震探测经验","authors":"B. G. Gorshkov, D. A. Ilinskiy, D. E. Simikin, M. A. Taranov","doi":"10.3103/S0747923925700070","DOIUrl":null,"url":null,"abstract":"<p>The practical results of earthquake detection with a distributed acoustic sensor (DAS) developed by PetroFibre LLC are reported. The operating principle of the DAS is based on interferometric detection of light resulting from Rayleigh scattering in optical fibers. The detected earthquake occurred in Iran. A fiber optic cable used as the sensitive element of the DAS was placed at the bottom of a shallow water region of the Black Sea, supervised by the Southern Branch of the Shirshov Institute of Oceanology, Russian Academy of Sciences. Gravity waves are shown to be a significant interference factor, preventing analysis of the wavefield for seismic event detection. Filtering the wavefield with a lower cutoff frequency exceeding 0.05 Hz was used to suppress the influence of the gravity waves. The specific features of the directivity pattern of the fiber optic cable as a sensitive element are considered; results are given indicating a lack of susceptibility of the cable to acoustic perturbations acting on it transversally.</p>","PeriodicalId":45174,"journal":{"name":"Seismic Instruments","volume":"60 1-3","pages":"1 - 9"},"PeriodicalIF":0.3000,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Experience in Earthquake Detection with a Distributed Fiber Optic Acoustic Sensor (DAS) Deployed on the Bottom of the Black Sea from August 25 to November 30, 2021\",\"authors\":\"B. G. Gorshkov, D. A. Ilinskiy, D. E. Simikin, M. A. Taranov\",\"doi\":\"10.3103/S0747923925700070\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The practical results of earthquake detection with a distributed acoustic sensor (DAS) developed by PetroFibre LLC are reported. The operating principle of the DAS is based on interferometric detection of light resulting from Rayleigh scattering in optical fibers. The detected earthquake occurred in Iran. A fiber optic cable used as the sensitive element of the DAS was placed at the bottom of a shallow water region of the Black Sea, supervised by the Southern Branch of the Shirshov Institute of Oceanology, Russian Academy of Sciences. Gravity waves are shown to be a significant interference factor, preventing analysis of the wavefield for seismic event detection. Filtering the wavefield with a lower cutoff frequency exceeding 0.05 Hz was used to suppress the influence of the gravity waves. The specific features of the directivity pattern of the fiber optic cable as a sensitive element are considered; results are given indicating a lack of susceptibility of the cable to acoustic perturbations acting on it transversally.</p>\",\"PeriodicalId\":45174,\"journal\":{\"name\":\"Seismic Instruments\",\"volume\":\"60 1-3\",\"pages\":\"1 - 9\"},\"PeriodicalIF\":0.3000,\"publicationDate\":\"2025-06-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Seismic Instruments\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://link.springer.com/article/10.3103/S0747923925700070\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Seismic Instruments","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.3103/S0747923925700070","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
Experience in Earthquake Detection with a Distributed Fiber Optic Acoustic Sensor (DAS) Deployed on the Bottom of the Black Sea from August 25 to November 30, 2021
The practical results of earthquake detection with a distributed acoustic sensor (DAS) developed by PetroFibre LLC are reported. The operating principle of the DAS is based on interferometric detection of light resulting from Rayleigh scattering in optical fibers. The detected earthquake occurred in Iran. A fiber optic cable used as the sensitive element of the DAS was placed at the bottom of a shallow water region of the Black Sea, supervised by the Southern Branch of the Shirshov Institute of Oceanology, Russian Academy of Sciences. Gravity waves are shown to be a significant interference factor, preventing analysis of the wavefield for seismic event detection. Filtering the wavefield with a lower cutoff frequency exceeding 0.05 Hz was used to suppress the influence of the gravity waves. The specific features of the directivity pattern of the fiber optic cable as a sensitive element are considered; results are given indicating a lack of susceptibility of the cable to acoustic perturbations acting on it transversally.
期刊介绍：
Seismic Instruments is a journal devoted to the description of geophysical instruments used in seismic research. In addition to covering the actual instruments for registering seismic waves, substantial room is devoted to solving instrumental-methodological problems of geophysical monitoring, applying various methods that are used to search for earthquake precursors, to studying earthquake nucleation processes and to monitoring natural and technogenous processes. The description of the construction, working elements, and technical characteristics of the instruments, as well as some results of implementation of the instruments and interpretation of the results are given. Attention is paid to seismic monitoring data and earthquake catalog quality Analysis.
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