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The Multifractal Detrended Fluctuation Analysis (Mf-Dfa) and Anomalies in Geomagnetic Total Field Intensity Prior To Mw~5.5 Earthquake

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Title The Multifractal Detrended Fluctuation Analysis (Mf-Dfa) and Anomalies in Geomagnetic Total Field Intensity Prior To Mw~5.5 Earthquake
 
Creator Chetia, Timangshu
Baruah, Saurabh
Dey, Chandan
Baruah, Santanu
Sharma, Sangeeta
 
Subject Multifractal
Iterated amplitude adjust fourier transform
Geomagnetic field
Earthquake
Anomalies
 
Description 193-197
In the research article, we report the anomalies observed in geomagnetic total field intensity (BTotal) prior to Mw 5.5 Kokrajhar event. The multifractal analysis was scrutinized to reveal the underlying dynamics in the Geomagnetic Total field intensity time series. The multifractal spectrum on the day when the event occurred (TEvent day) and its surrogate (TSurrogate) was investigated to understand the behavior and dynamics hidden in BTotal time series. A significant variation in the multifractal spectrum was observed between TDay one (multifractal spectrum a day prior to the event) and TEvent day. It was also observed that the mulfractality of BTotal when the event occurred (TEvent day) got stronger than the multifractality of TDay one and was sourced from low values distribution. The multifractality in TDay one and TEvent day time series was not from source type long range correlation or sourced from broad probability density function. The investigation also manifests some non-linear features which probably evinces the anomalies to be seismic induced. The observations are elaborately emphasized in the article. The study scrutinizes the underlying dynamics in geomagnetic field intensity time series for earthquake precursory and forecast studies.
 
Date 2022-04-07T11:27:39Z
2022-04-07T11:27:39Z
2022-03
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscair.res.in/handle/123456789/59500
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJPAP Vol.60(03) [March 2022]