Ground Level Enhancement in the 2014 January 6 Solar Energetic Particle Event
We present a study of the 2014 January 6 solar energetic particle (SEP) event, which produced a small ground level enhancement (GLE), making it the second GLE of this unusual solar cycle 24. This event was primarily observed by the South Pole neutron monitors (increase of ~2.5%) whereas a few other...
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ftdatacite:10.48550/arxiv.1406.7172 2023-05-15T18:22:06+02:00 Ground Level Enhancement in the 2014 January 6 Solar Energetic Particle Event Thakur, N. Gopalswamy, N. Xie, H. Makela, P. Yashiro, S. Akiyama, S. Davila, J. M. 2014 https://dx.doi.org/10.48550/arxiv.1406.7172 https://arxiv.org/abs/1406.7172 unknown arXiv https://dx.doi.org/10.1088/2041-8205/790/1/l13 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences article-journal Article ScholarlyArticle Text 2014 ftdatacite https://doi.org/10.48550/arxiv.1406.7172 https://doi.org/10.1088/2041-8205/790/1/l13 2022-04-01T12:50:35Z We present a study of the 2014 January 6 solar energetic particle (SEP) event, which produced a small ground level enhancement (GLE), making it the second GLE of this unusual solar cycle 24. This event was primarily observed by the South Pole neutron monitors (increase of ~2.5%) whereas a few other neutron monitors recorded smaller increases. The associated coronal mass ejection (CME) originated behind the western limb and had the speed of 1960 km/s. The height of the CME at the start of the associated metric type II radio burst, which indicates the formation of a strong shock, was measured to be 1.61 Rs using a direct image from STEREO-A/EUVI. The CME height at the time of GLE particle release (determined using the South Pole neutron monitor data) was directly measured as 2.96 Rs, from the STEREO-A/COR1 white-light observations. These CME heights are consistent with those obtained for the GLE71, the only other GLE of the current cycle as well as cycle-23 GLEs derived using back-extrapolation. GLE72 is of special interest because it is one of the only two GLEs of cycle 24, one of the two behind-the-limb GLEs and one of the two smallest GLEs of cycles 23 and 24. Text South pole DataCite Metadata Store (German National Library of Science and Technology) South Pole |
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Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences |
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Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences Thakur, N. Gopalswamy, N. Xie, H. Makela, P. Yashiro, S. Akiyama, S. Davila, J. M. Ground Level Enhancement in the 2014 January 6 Solar Energetic Particle Event |
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Solar and Stellar Astrophysics astro-ph.SR FOS Physical sciences |
description |
We present a study of the 2014 January 6 solar energetic particle (SEP) event, which produced a small ground level enhancement (GLE), making it the second GLE of this unusual solar cycle 24. This event was primarily observed by the South Pole neutron monitors (increase of ~2.5%) whereas a few other neutron monitors recorded smaller increases. The associated coronal mass ejection (CME) originated behind the western limb and had the speed of 1960 km/s. The height of the CME at the start of the associated metric type II radio burst, which indicates the formation of a strong shock, was measured to be 1.61 Rs using a direct image from STEREO-A/EUVI. The CME height at the time of GLE particle release (determined using the South Pole neutron monitor data) was directly measured as 2.96 Rs, from the STEREO-A/COR1 white-light observations. These CME heights are consistent with those obtained for the GLE71, the only other GLE of the current cycle as well as cycle-23 GLEs derived using back-extrapolation. GLE72 is of special interest because it is one of the only two GLEs of cycle 24, one of the two behind-the-limb GLEs and one of the two smallest GLEs of cycles 23 and 24. |
format |
Text |
author |
Thakur, N. Gopalswamy, N. Xie, H. Makela, P. Yashiro, S. Akiyama, S. Davila, J. M. |
author_facet |
Thakur, N. Gopalswamy, N. Xie, H. Makela, P. Yashiro, S. Akiyama, S. Davila, J. M. |
author_sort |
Thakur, N. |
title |
Ground Level Enhancement in the 2014 January 6 Solar Energetic Particle Event |
title_short |
Ground Level Enhancement in the 2014 January 6 Solar Energetic Particle Event |
title_full |
Ground Level Enhancement in the 2014 January 6 Solar Energetic Particle Event |
title_fullStr |
Ground Level Enhancement in the 2014 January 6 Solar Energetic Particle Event |
title_full_unstemmed |
Ground Level Enhancement in the 2014 January 6 Solar Energetic Particle Event |
title_sort |
ground level enhancement in the 2014 january 6 solar energetic particle event |
publisher |
arXiv |
publishDate |
2014 |
url |
https://dx.doi.org/10.48550/arxiv.1406.7172 https://arxiv.org/abs/1406.7172 |
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South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://dx.doi.org/10.1088/2041-8205/790/1/l13 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1406.7172 https://doi.org/10.1088/2041-8205/790/1/l13 |
_version_ |
1766201456738697216 |