Galactic Cosmic Ray Intensity Response to Interplanetary Coronal Mass Ejections/Magnetic Clouds in 1995 – 2009

Solar Physics ◽  
2011 ◽  
Vol 270 (2) ◽  
pp. 609-627 ◽  
Author(s):  
I. G. Richardson ◽  
H. V. Cane
Keyword(s):  
Coronal Mass Ejections ◽  
Cosmic Ray ◽  
Magnetic Clouds ◽  
Interplanetary Coronal Mass Ejections ◽  
Cosmic Ray Intensity ◽  
Intensity Response ◽  
Galactic Cosmic Ray

Testing the Impact of Coronal Mass Ejections on Cosmic Ray Intensity Modulation with Algorithm selected Forbush Decreases

2020 ◽  
Author(s):  
O Okike ◽  
O C Nwuzor ◽  
F C Odo ◽  
E U Iyida ◽  
J E Ekpe ◽  
...  
Keyword(s):  
Coronal Mass Ejections ◽  
Cosmic Ray ◽  
Forbush Decreases ◽  
Cosmic Ray Intensity ◽  
Event Identification ◽  
Diurnal Anisotropy ◽  
Current Article ◽  
Galactic Cosmic Ray ◽  
The Impact ◽  
The Relationship

Abstract The relationship between coronal mass ejections (CMEs) and Forbush decreases (FDs) has been investigated in the past. But selection of both solar events are difficult. Researchers have developed manual and automated methods in efforts to identify CMEs as well as FDs. While scientists investigating CMEs have made significant advancement, leading to several CME catalogues, including manual and automated events catalogues, those analyzing FDs have recorded relatively less progress. Till date, there are no comprehensive manual FD catalogues, for example. There are also paucity of Automated FD lists. Many investigators, therefore, attempt to manually select FDs which are subsequently used in the analysis of the impact of CMEs on galactic cosmic ray (GCR) flux depressions. However, some of the CME versus FD correlation results might be biased since manual event identification is usually subjective, unable to account for the presence of solar-diurnal anisotropy which characterizes GCR flux variations. The current article investigates the relation between CMEs and FDs with emphasis on accurate and careful Forbush event selection.

scholarly journals Multipoint, high time resolution galactic cosmic ray observations associated with two interplanetary coronal mass ejections

2009 ◽  
Vol 114 (A7) ◽  
pp. n/a-n/a ◽  
Author(s):  
A. P. Jordan ◽  
H. E. Spence ◽  
J. B. Blake ◽  
T. Mulligan ◽  
D. N. A. Shaul ◽  
...  
Keyword(s):  
Time Resolution ◽  
Coronal Mass Ejections ◽  
Cosmic Ray ◽  
High Time ◽  
High Time Resolution ◽  
Interplanetary Coronal Mass Ejections ◽  
Galactic Cosmic Ray

scholarly journals Galactic cosmic ray decreases associated with non-interacting magnetic clouds in the 23rd solar cycle

2013 ◽  
Vol 8 (S300) ◽  
pp. 483-484
Author(s):  
J. J. Masías-Meza ◽  
S. Dasso
Keyword(s):  
Solar Cycle ◽  
Cosmic Ray ◽  
Total Sample ◽  
Magnetic Clouds ◽  
Neutron Monitors ◽  
Interplanetary Coronal Mass Ejections ◽  
23Rd Solar Cycle ◽  
Preliminary Study ◽  
Galactic Cosmic Ray ◽  
Selection Of

AbstractSudden Galactic Cosmic Ray (GCR) intensity decreases are related to the passage of Interplanetary Coronal Mass Ejections (ICMEs). These phenomena are also known as Forbush Decreases (FDs). The deepest FDs are associated with the passage of Magnetic Clouds (MCs). In this preliminary study we select “non-interacting” MCs associated with FDs observed from ground Neutron Monitors in the period 1996-2009, with the aim of reducing the complexity and the number of parameters involved in the GCR-MC interactions. We introduce a method to determine properties of the “ejecta component” of the FD. We analyze properties of the ejecta component in combination with properties of MCs. From the resulting selection of events, we find that those FDs containing ejecta components show stronger correlations with MC parameters than our total sample of events.

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