Rise of Magnetotelluric Data QualityBased on Coherence Prameter in Savu Basin, East Nusa Tenggara

Dwiyantoro, Rizky Ramadhan and Junursyah, Lucky and Yatini, Yatini (2018) Rise of Magnetotelluric Data QualityBased on Coherence Prameter in Savu Basin, East Nusa Tenggara. In: Indonesian Society of Petroleum Geologist 2nd ISPG Research Forum, 22-23 March 2018, Universitas Indonesia.


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Magnetotelluric (MT) is a passive geophysical method that utilizing natural electromagnetic wave source by measuring electric field variation in a upright and changing towards time with the result that sub surface resistivity variation can be defined. Estimated time for MT measuring was 12 hours so data was affected by noise and caused decreasing grade of coherence araound 0 ≤ψ≤ 1. Increasing grade of coherence can be done by choosing proper robust technique and time series analysis at function transfer time series into frequency. Series, and then continued by selecting the correct XPR. Increasing grade of coherence analysis was done in 22 points of MT measuring on Sawu Island, East Nusa Tenggara by Pusat Survei Geologi on 2014. The components parameter of coherence include electric field (E) and magnetic field (H) will icrease by equal value or coheren value, so that erros in inversion part and interpretation part will decrease. Correct data processing by using parameter of coherence. Impact of this increase is affecting the trend of resistivity value into more representative than before while the data was still affected by noise which means the grade of coherence is capable to be inverted and interpreted.

Item Type: Conference or Workshop Item (Paper)
Subjects: Q Science > Q Science (General)
Depositing User: Dr Y Yatini
Date Deposited: 16 Oct 2019 08:12
Last Modified: 16 Oct 2019 08:14
URI: http://eprints.upnyk.ac.id/id/eprint/18955

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