Solar Energetic Particle Events and Forbush Decreases Driven by the Same Solar Sources

被引：4
作者：
Belov, Anatoly [1 ]
Shlyk, Nataly [1 ]
Abunina, Maria [1 ]
Belova, Elena [1 ]
Abunin, Artem [1 ]
Papaioannou, Athanasios [2 ]
机构：
[1] Russian Acad Sci IZMIRAN, Pushkov Inst Terr Magnetism Ionosphere & Radio Wa, Kaluzhskoe Hw 4, Moscow 108840, Russia
[2] Natl Observ Athens, Inst Astron Astrophys Space Applicat & Remote Sen, I Metaxa & Vas Pavlou St, Penteli 15236, Greece
来源：
UNIVERSE | 2022年 / 8卷 / 08期
基金：
俄罗斯科学基金会;
关键词：
ground level enhancements; Forbush decreases; solar flares; coronal mass ejections; CORONAL MASS EJECTIONS; MAGNETIC CLOUDS; PROTON EVENTS; FLARES; ENHANCEMENTS; CATALOG; VOYAGER;
D O I：
10.3390/universe8080403
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The characteristics of Forbush decreases (FDs) and solar energetic particle (SEP) events driven by the same solar source (i.e., coronal mass ejection and associated solar flare) are investigated. The part of the solar disk (04 degrees E-35 degrees W) in which most of the solar events lead both to an FD and SEP event on Earth was chosen. SEPs for different energies (E > 10 MeV, E > 100 MeV, and Ground Level Enhancements) and with different flux thresholds were considered independently. The obtained results were compared with the control group of FDs that had solar sources within the same longitudinal zone but were not accompanied by any SEPs. It is shown that coronal mass ejections (CMEs) followed by SEPs have a very high probability of creating a large FD in the Earth's orbit and to further cause a geomagnetic storm. It is also found that the accelerative and modulating efficiencies of powerful solar events are well correlated; this can be explained mostly by high speeds of the corresponding CMEs.
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页数：18
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