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Forbush decrease observed by SEVAN particle detector network on November 4, 2021
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Forbush decrease observed by SEVAN particle detector network on November 4, 2021
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On November 3-4 2021, an interplanetary coronal mass injection (ICME) hits the magnetosphere, sparking a strong G3-class geomagnetic storm and auroras as far south as California and New Mexico. All detectors of the SEVAN network registered a Forbush decrease (FD) of 5-10 percentdeep in 1 minute time series of count rates. We present the results of a comparison of Fd registered on mountain altitudes on Aragats (Armenia), Lomnicky Stit (Slovakia), Musala (Bulgaria), and at sea level DESY (Hamburg, Germany), and in Mileshovka, Czechia. We present as well purity and barometric coefficients of different coincidences of SEVAN detector layers on Aragats. We demonstrate disturbances of the near-surface electric (NSEF) and geomagnetic fields at the arrival of the ICME on Earth.
Forward citations
Cited by 2 Pith papers
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Morphological Fingerprints of Forbush Decreases and Their Relation to Geomagnetic Storm Severity
Graph-based morphological fingerprints from cosmic-ray station data show moderate skill at classifying and regressing geomagnetic storm intensity linked to Forbush decreases.
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Morphological Fingerprints of Forbush Decreases and Their Relation to Geomagnetic Storm Severity
Graph fingerprints of neutron-monitor responses to Forbush decreases carry a moderate, likely optimistic signal for classifying storm severity and predicting FD magnitude.
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