m2) is not so low when compared with recent paleomagnetic data for the Holocene (last 12 ka) and for the entire Brunhes geomagnetic normal polarity (last ~0.8 Ma), although the rate of decay is similar to that given by previous documented geomagnetic reversals or excursions.However, the current value of the dipolar moment (7.7 1022A The presence of the reversal patches at the CMB seems to be characteristic during the preparation phase of a geomagnetic transition. In addition, we demonstrate that the quadrupole field mainly controls this reversal patch along with the rapid decay of the dipolar field. Our results reveal that one of the reversed polarity patch located at the CMB under the South Atlantic Ocean is growing with a pronounced rate of −2.54♱05 nT per century and with western drift. In this paper we carry out a detailed study about this issue using the most recent models that also include data from the last ESA mission Swarm. Several studies associate this anomaly as an indicator of an upcoming geomagnetic transition, such an excursion or reversal. Its extent area at the Earth's surface is continuously growing since the intensity instrumental measurements are available covering part of the Southern Hemisphere and centered in South America. The magnetic anomaly in the South Atlantic Ocean was first discovered in 1958. Details of these results are reported in this paper.The South Atlantic Anomaly is nowadays one of the most important features of the Earth's magnetic field. Small solar transient events, such as corotating interaction region (CIR) and We show that it is correlated with the pre-reversalĮlectric field, and propitiate the observation of muon enhancements due to Increase of the muon intensity ($E_>0.2GeV$) at ground, in the day side, With energies above the pion production threshold. Unusually large particle flux present in the SAA region, including particles Magnetosphere, propitiate the magnetic reconnections of the IMF lines that will Particles in this region and an zonal electric field known as the pre-reversalĮlectric field (PRE) with an enhancement at evening hours. Magnetosphere's dip is responsible for several processes, such as the highĬonductivity of the atmospheric layers due to the precipitation of energetic This solar cycle modulation of the inner belt is mainly due to losses by increased atmospheric interactions during solar maximum. Rigidity of response to cosmic protons and ions ($\geq 0.4$ GV). Scientists trace back strange behavior in South Atlantic magnetic field 11 million years The motions of the planet’s outer core are variable, causing fluctuations in the magnetic field, and the. At solar minimum, the fluxes are higher at low L corresponding to the northern border of the South Atlantic Anomaly (SAA). This characteristic offers to the muon telescopes the lowest TheseĬoordinates are inside of the South Atlantic Anomaly (SAA) region, a dip in the Based on theĭata of two directional muon telescopes and located at 22S and 43W. (AP) South Carolina Republicans are pushing new abortion restrictions in a late attempt to curtail access after a near-total ban failed last month. Intensity at ground, due to magnetic anomaly over south Atlantic. Augusto and 3 other authors Download PDF Abstract: The goal of this study is to examine the response and changes of the muon Download a PDF of the paper titled Effects of the South Atlantic Anomaly on the muon flux at sea level, by C.
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