The deep structure of the Kulu earthquake-generating zone in the upper Kolyma highland from geophysical data |
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| Authors: | V M Sharafutdinov I M Khasanov |
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| Institution: | 1.Northeast Institute of Multidisciplinary Research, Far East Division,Russian Academy of Sciences,Magadan,Russia |
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| Abstract: | We measured and interpreted 30 physical magnetotelluric sounding sites using an SGS-E station and 20 km of electrical profiling
observations using SDVR-4M instrumentation. We constructed a map of seismicity, an interpretation map, and four geoelectric
sections, which give an idea of the deep structure for the Kulu earthquake-generating zone. A general geoelectric upper crustal
model was developed for the zone down to depths of 20–22 km. Three nearly vertical conductive volumes were identified (thickness
3–5 km, depth 10–22 km), which provide the positions of seismically active deep-seated faults that pinpoint the Kulu earthquake-generating
zone. The preliminary boundary of the zone was determined. It was found that earth-quake epicenters are confined to lithosphere
volumes with increased concentrations of conductive layers and zones. |
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