Magnetic Field and Electron Density Data Analysis from Swarm Satellites Searching for Ionospheric Effects by Great Earthquakes: 12 Case Studies from 2014 to 2016

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De Santis, Angelo and Marchetti, Dedalo and Spogli, Luca and Cianchini, Gianfranco and Pavón Carrasco, Francisco Javier and Franceschi, Giorgiana De and Di Giovambattista, Rita and Perrone, Loredana and Qamili, Enkelejda and Cesaroni, Claudio and De Santis, Anna and Ippolito, Alessandro and Piscini, Alessandro and Campuzano, Saioa A. and Sabbagh, Dario and Amoruso, Leonardo and Carbone, Marianna and Santoro, Francesca and Abbattista, Cristoforo and Drimaco, Daniela (2019) Magnetic Field and Electron Density Data Analysis from Swarm Satellites Searching for Ionospheric Effects by Great Earthquakes: 12 Case Studies from 2014 to 2016. Atmosphere, 10 (7). p. 371. ISSN 2073-4433

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Official URL: https://doi.org/10.3390/atmos10070371




Abstract

We analyse Swarm satellite magnetic field and electron density data one month before and one month after 12 strong earthquakes that have occurred in the first 2.5 years of Swarm satellite mission lifetime in the Mediterranean region (magnitude M6.1+) or in the rest of the world (M6.7+). The search for anomalies was limited to the area centred at each earthquake epicentre and bounded by a circle that scales with magnitude according to the Dobrovolsky’s radius. We define the magnetic and electron density anomalies statistically in terms of specific thresholds with respect to the same statistical quantity along the whole residual satellite track (|geomagnetic latitude| ≤ 50°, quiet geomagnetic conditions). Once normalized by the analysed satellite tracks, the anomalies associated to all earthquakes resemble a linear dependence with earthquake magnitude, so supporting the statistical correlation with earthquakes and excluding a relationship by chance.


Item Type:Article
Uncontrolled Keywords:geomagnetic field; electron density; seismic precursors; strong and intermediate earthquakes; Swarm satellites
Subjects:Sciences > Physics > Electromagnetism
Sciences > Physics > Geophysics
ID Code:65363
Deposited On:07 May 2021 16:44
Last Modified:10 May 2021 06:57

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