Enhancement and modulation of cosmic noise absorption in the afternoon sector at subauroral location ( L = 5) during the recovery phase of 17 March 2015 geomagnetic storm
The present study has focused on the intense production of cosmic noise absorption (CNA) at Maitri, Antarctica (L = 5; CGM −62°S, 55°E) during the early recovery phase of the largest storm of the current solar cycle commenced on 17 March 2015 St. Patrick's Day. The enhancement of CNA during 15–...
Published in: | Journal of Geophysical Research: Space Physics |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2017
|
Subjects: | |
Online Access: | https://eprints.lancs.ac.uk/id/eprint/88236/ https://eprints.lancs.ac.uk/id/eprint/88236/1/Behera_et_al_2017_Journal_of_Geophysical_Research_Space_Physics.pdf https://eprints.lancs.ac.uk/id/eprint/88236/4/modulation_jgr_final_correction.pdf https://doi.org/10.1002/2017JA024226 |
id |
ftulancaster:oai:eprints.lancs.ac.uk:88236 |
---|---|
record_format |
openpolar |
spelling |
ftulancaster:oai:eprints.lancs.ac.uk:88236 2023-08-27T04:04:36+02:00 Enhancement and modulation of cosmic noise absorption in the afternoon sector at subauroral location ( L = 5) during the recovery phase of 17 March 2015 geomagnetic storm Behera, Jayanta K. Sinha, Ashwini K. Vichare, Geeta Bhaskar, Ankush Honary, Farideh Rawat, Rahul Singh, Rajesh 2017-09 application/pdf https://eprints.lancs.ac.uk/id/eprint/88236/ https://eprints.lancs.ac.uk/id/eprint/88236/1/Behera_et_al_2017_Journal_of_Geophysical_Research_Space_Physics.pdf https://eprints.lancs.ac.uk/id/eprint/88236/4/modulation_jgr_final_correction.pdf https://doi.org/10.1002/2017JA024226 en eng https://eprints.lancs.ac.uk/id/eprint/88236/1/Behera_et_al_2017_Journal_of_Geophysical_Research_Space_Physics.pdf https://eprints.lancs.ac.uk/id/eprint/88236/4/modulation_jgr_final_correction.pdf Behera, Jayanta K. and Sinha, Ashwini K. and Vichare, Geeta and Bhaskar, Ankush and Honary, Farideh and Rawat, Rahul and Singh, Rajesh (2017) Enhancement and modulation of cosmic noise absorption in the afternoon sector at subauroral location ( L = 5) during the recovery phase of 17 March 2015 geomagnetic storm. Journal of Geophysical Research: Space Physics, 122 (9). pp. 9528-9544. ISSN 2169-9380 creative_commons_attribution_4_0_international_license creative_commons_attribution_noncommercial_4_0_international_license Journal Article PeerReviewed 2017 ftulancaster https://doi.org/10.1002/2017JA024226 2023-08-03T22:32:01Z The present study has focused on the intense production of cosmic noise absorption (CNA) at Maitri, Antarctica (L = 5; CGM −62°S, 55°E) during the early recovery phase of the largest storm of the current solar cycle commenced on 17 March 2015 St. Patrick's Day. The enhancement of CNA during 15–18 UT (14–17 magnetic local time (MLT); MLT = UT − 1 at Maitri) was as large as the CNA enhancement occurred during the main phase of the storm. During this time the CNA pattern also exhibits oscillation in the Pc5 (2–7 mHz) range and is in simultaneity with geomagnetic pulsations in the same frequency range. We observed the amplitude of CNA pulsation is well correlated with the level of CNA production. High-amplitude Pc5 oscillations were observed in the vicinity of auroral oval near Maitri. Absence of electromagnetic ion cyclotron (EMIC) waves is marked suggesting the possible role of VLF waves in precipitation. The reason for the intense CNA production is found to be the precipitation caused mainly by hiss-driven subrelativistic electrons. The CNA enhancement event is located well inside the dusk plasmaspheric bulge region as suggested by Tsurutani et al. (2015). Signature of enhanced eastward electrojet at Maitri during 14–17 MLT could be an additional factor for such large CNA. In order to establish the cause and effect relationship between the geomagnetic and CNA oscillations at Maitri, transfer entropy method has been used, which confirmed the modulation of CNA by geomagnetic pulsations. Article in Journal/Newspaper Antarc* Antarctica Lancaster University: Lancaster Eprints Maitri ENVELOPE(11.733,11.733,-70.764,-70.764) Journal of Geophysical Research: Space Physics 122 9 9528 9544 |
institution |
Open Polar |
collection |
Lancaster University: Lancaster Eprints |
op_collection_id |
ftulancaster |
language |
English |
description |
The present study has focused on the intense production of cosmic noise absorption (CNA) at Maitri, Antarctica (L = 5; CGM −62°S, 55°E) during the early recovery phase of the largest storm of the current solar cycle commenced on 17 March 2015 St. Patrick's Day. The enhancement of CNA during 15–18 UT (14–17 magnetic local time (MLT); MLT = UT − 1 at Maitri) was as large as the CNA enhancement occurred during the main phase of the storm. During this time the CNA pattern also exhibits oscillation in the Pc5 (2–7 mHz) range and is in simultaneity with geomagnetic pulsations in the same frequency range. We observed the amplitude of CNA pulsation is well correlated with the level of CNA production. High-amplitude Pc5 oscillations were observed in the vicinity of auroral oval near Maitri. Absence of electromagnetic ion cyclotron (EMIC) waves is marked suggesting the possible role of VLF waves in precipitation. The reason for the intense CNA production is found to be the precipitation caused mainly by hiss-driven subrelativistic electrons. The CNA enhancement event is located well inside the dusk plasmaspheric bulge region as suggested by Tsurutani et al. (2015). Signature of enhanced eastward electrojet at Maitri during 14–17 MLT could be an additional factor for such large CNA. In order to establish the cause and effect relationship between the geomagnetic and CNA oscillations at Maitri, transfer entropy method has been used, which confirmed the modulation of CNA by geomagnetic pulsations. |
format |
Article in Journal/Newspaper |
author |
Behera, Jayanta K. Sinha, Ashwini K. Vichare, Geeta Bhaskar, Ankush Honary, Farideh Rawat, Rahul Singh, Rajesh |
spellingShingle |
Behera, Jayanta K. Sinha, Ashwini K. Vichare, Geeta Bhaskar, Ankush Honary, Farideh Rawat, Rahul Singh, Rajesh Enhancement and modulation of cosmic noise absorption in the afternoon sector at subauroral location ( L = 5) during the recovery phase of 17 March 2015 geomagnetic storm |
author_facet |
Behera, Jayanta K. Sinha, Ashwini K. Vichare, Geeta Bhaskar, Ankush Honary, Farideh Rawat, Rahul Singh, Rajesh |
author_sort |
Behera, Jayanta K. |
title |
Enhancement and modulation of cosmic noise absorption in the afternoon sector at subauroral location ( L = 5) during the recovery phase of 17 March 2015 geomagnetic storm |
title_short |
Enhancement and modulation of cosmic noise absorption in the afternoon sector at subauroral location ( L = 5) during the recovery phase of 17 March 2015 geomagnetic storm |
title_full |
Enhancement and modulation of cosmic noise absorption in the afternoon sector at subauroral location ( L = 5) during the recovery phase of 17 March 2015 geomagnetic storm |
title_fullStr |
Enhancement and modulation of cosmic noise absorption in the afternoon sector at subauroral location ( L = 5) during the recovery phase of 17 March 2015 geomagnetic storm |
title_full_unstemmed |
Enhancement and modulation of cosmic noise absorption in the afternoon sector at subauroral location ( L = 5) during the recovery phase of 17 March 2015 geomagnetic storm |
title_sort |
enhancement and modulation of cosmic noise absorption in the afternoon sector at subauroral location ( l = 5) during the recovery phase of 17 march 2015 geomagnetic storm |
publishDate |
2017 |
url |
https://eprints.lancs.ac.uk/id/eprint/88236/ https://eprints.lancs.ac.uk/id/eprint/88236/1/Behera_et_al_2017_Journal_of_Geophysical_Research_Space_Physics.pdf https://eprints.lancs.ac.uk/id/eprint/88236/4/modulation_jgr_final_correction.pdf https://doi.org/10.1002/2017JA024226 |
long_lat |
ENVELOPE(11.733,11.733,-70.764,-70.764) |
geographic |
Maitri |
geographic_facet |
Maitri |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://eprints.lancs.ac.uk/id/eprint/88236/1/Behera_et_al_2017_Journal_of_Geophysical_Research_Space_Physics.pdf https://eprints.lancs.ac.uk/id/eprint/88236/4/modulation_jgr_final_correction.pdf Behera, Jayanta K. and Sinha, Ashwini K. and Vichare, Geeta and Bhaskar, Ankush and Honary, Farideh and Rawat, Rahul and Singh, Rajesh (2017) Enhancement and modulation of cosmic noise absorption in the afternoon sector at subauroral location ( L = 5) during the recovery phase of 17 March 2015 geomagnetic storm. Journal of Geophysical Research: Space Physics, 122 (9). pp. 9528-9544. ISSN 2169-9380 |
op_rights |
creative_commons_attribution_4_0_international_license creative_commons_attribution_noncommercial_4_0_international_license |
op_doi |
https://doi.org/10.1002/2017JA024226 |
container_title |
Journal of Geophysical Research: Space Physics |
container_volume |
122 |
container_issue |
9 |
container_start_page |
9528 |
op_container_end_page |
9544 |
_version_ |
1775352325600182272 |