2021
DOI: 10.3389/feart.2020.607049
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South Atlantic Anomaly Areal Extent as a Possible Indicator of Geomagnetic Jerks in the Satellite Era

Abstract: Geomagnetic jerks are sudden changes in the geomagnetic field secular variation related to changes in outer core flow patterns. Finding geophysical phenomena related to geomagnetic jerks provides a vital contribution to better understand the geomagnetic field behavior. Here, we link the geomagnetic jerks occurrence with one of the most relevant features of the geomagnetic field nowadays, the South Atlantic Anomaly (SAA), which is due to the presence of reversed flux patches (RFPs) at the Core-Mantle Boundary (… Show more

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Cited by 7 publications
(3 citation statements)
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“…Apart from the previous approach to identify the occurrence of jerks, there are other mathematical techniques for this purpose, such as the use of wavelets (Alexandrescu et al 1996), Slepian functions (Kim and von Frese 2013) or nonlinear approaches (Qamili et al 2013). Recently, Campuzano et al (2021) have studied the occurrence of jerks using the characteristics of the South Atlantic Anomaly (SAA). They found a correlation between the occurrence of jerks and the minima of acceleration of the areal extent of the SAA.…”
Section: Introductionmentioning
confidence: 99%
“…Apart from the previous approach to identify the occurrence of jerks, there are other mathematical techniques for this purpose, such as the use of wavelets (Alexandrescu et al 1996), Slepian functions (Kim and von Frese 2013) or nonlinear approaches (Qamili et al 2013). Recently, Campuzano et al (2021) have studied the occurrence of jerks using the characteristics of the South Atlantic Anomaly (SAA). They found a correlation between the occurrence of jerks and the minima of acceleration of the areal extent of the SAA.…”
Section: Introductionmentioning
confidence: 99%
“…A recent finding regarding the SAA evolution is the possible relation between the occurrence of geomagnetic jerks and the SAA areal extent (Campuzano et al 2021). Geomagnetic jerks are abrupt and sharp changes in the secular variation of the geomagnetic field (see Fig.…”
Section: Magnetic Field Observations Providing Information On the Corementioning
confidence: 97%
“…Tarduno et al (2015) propose that the unusual CMB composition and structure beneath Southern Africa leads to core flux expulsion, resulting in observed low field strengths in this region. Recently, Campuzano et al (2021) have linked the geomagnetic jerks occurrence with the SAA by studying the changes of the RFPs at the CMB and the area of the SAA at Earth's surface. The SAA region with very weak geomagnetic field, less protected against high-energy particles, is a concern to modern technology as the increased radiation during geomagnetic storms can cause faults in spacecraft electronics and can induce false instrument readings (Schaefer et al, 2016).…”
Section: Introductionmentioning
confidence: 99%