Details of the abstract
Title of paper | Investigation of Lithosphere Structure of Northwestern Anatolia with long-period magnetotelluric: Part 1. acquisition data by using remotely controlled system and comparison to previously collected broadband magnetotelluric data |
List of authors | Demirci, İ., Gündoğdu, N.Y., Oskay, M.D., Candansayar, M.E., |
Affiliation(s) | Ankara University, Faculty of Engineering, Geophysical Engineering Department, Geophysical Modelling Group |
Summary | In our previous study, we collected magnetotelluric (MT) data in broadband period ranges (T=0.0031s to 2000s) on 2006-2011 to reveal the crustal structure of North-Western Anatolia. Due to the low resistivity structure of the study area, the relationship between the crustal structure and the lithosphere could not be clearly defined in our previous project. Therefore, long period (T=0.00001s to 10000s) MT measurements are planned in order to reveal the relationship of deep earthquakes in the area with the lithospheric mantle and to complete the deficiencies in 3-D interpretation due to profile intervals. For this purpose, Long Period MT measurements were collected with a station spacing of approximately 15 km along four South-North profile. The data collected by new generation MT measurement system developed by Phoenix (MTU-5C) that enable us to remotely control the data during measurements. This part of the study describes and discusses the effectiveness of remotely controlled measurement system by using MT data collected in North-Western Anatolia. During the MT data collection phase, real-time data transfer was made with the help of a modem using a cellular network, which has recently been used in our country and in the world. Due to the very low signal amplitudes of long-term MT measurements, it is difficult to collect, especially in noisy area where settlements are located at frequent intervals. Thanks to remotely controlled measurement innovation, data quality is controlled during data collection. If the data quality is not good because of the unpredictable noise sources, the station location can be changed or precautions can be taken. In this study, real-time analysis of data and initial data processing results of measured data during long-period MT data collection will be presented. We also compare the broadband data collected from the same stations between the years 2008 to 2011. |
Session Keyword | 1.0 Instrumentation, sources and data processing |
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