Please use this identifier to cite or link to this item:
http://library.iigm.res.in:8080/xmlui/handle/123456789/880
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Veenadhari, B. | |
dc.contributor.author | Selvakumaran, R. | |
dc.contributor.author | Singh, Rajesh | |
dc.contributor.author | Maurya, A.K. | |
dc.contributor.author | Gopalswamy, N. | |
dc.contributor.author | Kumar, Sushil | |
dc.contributor.author | Kikuchi, T. | |
dc.date.accessioned | 2016-04-04T10:17:05Z | |
dc.date.accessioned | 2021-02-12T09:21:30Z | - |
dc.date.available | 2016-04-04T10:17:05Z | |
dc.date.available | 2021-02-12T09:21:30Z | - |
dc.date.issued | 2012 | |
dc.identifier.citation | JGR-Space Physics, v.117/A4, 2012, doi: 10.1029/2011JA017216 | en_US |
dc.identifier.uri | http://localhost:8080/xmlui/handle/123456789/880 | - |
dc.description.abstract | Interplanetary (IP) shocks are mainly responsible for the sudden compression of the magnetosphere, causing storm sudden commencement (SC) and sudden impulses (SIs) which are detected by ground-based magnetometers. On the basis of the list of 222 IP shocks compiled by Gopalswamy et al. (2010), we have investigated the dependence of SC/SIs amplitudes on the speed of the coronal mass ejections (CMEs) that drive the shocks near the Sun as well as in the interplanetary medium. We find that about 91% of the IP shocks were associated with SC/SIs. The average speed of the SC/SI-associated CMEs is 1015 km/s, which is almost a factor of 2 higher than the general CME speed. When the shocks were grouped according to their ability to produce type II radio burst in the interplanetary medium, we find that the radio-loud (RL) shocks produce a much larger SC/SI amplitude (average ∼32 nT) compared to the radio-quiet (RQ) shocks (average ∼19 nT). Clearly, RL shocks are more effective in producing SC/SIs than the RQ shocks. We also divided the IP shocks according to the type of IP counterpart of interplanetary CMEs (ICMEs): magnetic clouds (MCs) and nonmagnetic clouds. We find that the MC-associated shock speeds are better correlated with SC/SI amplitudes than those associated with non-MC ejecta. The SC/SI amplitudes are also higher for MCs than ejecta. Our results show that RL and RQ type of shocks are important parameters in producing the SC/SI amplitude. | en_US |
dc.language.iso | en | en_US |
dc.subject | Interplanetary | en_US |
dc.subject | Coronal mass ejection | en_US |
dc.subject | Shocks | en_US |
dc.subject | CMEs | en_US |
dc.subject | Radio-loud | en_US |
dc.title | Coronal mass ejection–driven shocks and the associated sudden commencements/sudden impulses | en_US |
dc.type | Article | en_US |
dc.identifier.accession | 091202 | |
Appears in Collections: | ODA_Reprints |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
VeenadhariB_etal_JGR_2012.pdf | Reprint | 977.85 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.