A tool for Swarm satellite data analysis and anomaly detection

In this work we introduce a system pipeline for the analysis of earth's electromagnetic field that is used to analyse precursors to earthquakes. Data gathered by the Swarm satellites are used to present the utility of our system. Our objective is to provide a streamlined method to analyze elect...

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Bibliographic Details
Published in:PloS one 2019-04, Vol.14 (4), p.e0212098-e0212098
Main Authors: Christodoulou, Vyron, Bi, Yaxin, Wilkie, George
Format: Article
Language:English
Subjects:
Algorithms
Analysis
Anomalies
China
Computer and Information Sciences
Data Analysis
Data processing
Earth Sciences
Earthquake prediction
Earthquakes
Electromagnetic Fields
Electromagnetism
Engineering
Engineering and Technology
Environmental aspects
Forecasts and trends
Magnetic fields
Physical Sciences
Precursors
Research and Analysis Methods
Satellite Communications
Satellite data
Satellite data analysis
Satellites
Seismic activity
Seismology
Sensors
Signal processing
Software
Time series
Visualization (Psychology)
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Summary:In this work we introduce a system pipeline for the analysis of earth's electromagnetic field that is used to analyse precursors to earthquakes. Data gathered by the Swarm satellites are used to present the utility of our system. Our objective is to provide a streamlined method to analyze electromagnetic data over a region and investigate the relationship of precursory signals to seismic events. The process follows three distinct stages: data extraction, data pre-processing and anomaly detection. The first stage consists of the region selection and data extraction. The second stage consists of four different pre-processing methods that address the data sparsity problem and the cause of artificial anomalies. The last stage is the Anomaly Detection (AD) of the Swarm satellite data, over the investigated region. The different methods that are implemented are known to perform well in the field of AD. Following the presentation of our system, a case study is described where the seismic event of 6.2 Mw is in Ludian, China and occurred on 3rd August 2014. The event is used to present the usefulness of our approach and pinpoint some critical problems regarding satellite data that were identified.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0212098