FRACTAL CHARACTERISTICS OF ULF EMISSIONS REGISTERED IN THE HIGH LATITUDE SEISMIC-QUIET REGION OF SPITSBERGEN ISLAND
Abstract. ULF frequency range (f = 0.001-5Hz) is now considered as a promising one for manifestation of electromagnetic earthquake precursors. To support the registration of ULF emissions in seismic-active areas, and to exclude magnetospheric effects from the lithospheric ones, the reference station...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.586.473 http://geo.phys.spbu.ru/materials_of_a_conference_2008/SEMP/Smirnova_Isavnin.pdf |
| Summary: | Abstract. ULF frequency range (f = 0.001-5Hz) is now considered as a promising one for manifestation of electromagnetic earthquake precursors. To support the registration of ULF emissions in seismic-active areas, and to exclude magnetospheric effects from the lithospheric ones, the reference stations in seismic quiet but magnetic active regions are required. Here we are starting to analyze the magnetic field data obtained with high resolution (10 Hz sampling rate) in the high latitude seismic-quiet region of Spitsbergen Island (Barentsburg station, Φm=76 ° N; Λm=115°). Fractal analysis of the ULF data has been fulfilled using Higuchi method and Burlaga-Klein approach. The first preliminary results of the fractal analysis are presented. Variations of the fractal dimensions of the ULF emissions time series are considered along the local time. The possible physical interpretation of the results obtained is suggested. A possibility of using the Barentsburg observatory as a reference station in seismo-electromagnetic research is discussed. |
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