Features and Source Current of Long‐Period Induced Geoelectric Field During Magnetic Storms: A Case Study
Abstract We present a case study on the long‐period ( >105 s) induced geoelectric field disturbance during magnetic storms. A set of continuous 33‐day measurements of the geoelectric field, geomagnetic field, geomagnetic indices, and interplanetary magnetic field are analyzed. In the studied 33 d...
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Space Weather |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2019SW002298 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841536461281689600 |
|---|---|
| author | S. Y. Wu S. Yao X. D. Feng W. B. Wei Y. T. Yin L. T. Zhang H. Dong G. W. Wang J. L. Liu Y. Q. Yu D. Wei |
| author_facet | S. Y. Wu S. Yao X. D. Feng W. B. Wei Y. T. Yin L. T. Zhang H. Dong G. W. Wang J. L. Liu Y. Q. Yu D. Wei |
| author_sort | S. Y. Wu |
| collection | DOAJ |
| description | Abstract We present a case study on the long‐period ( >105 s) induced geoelectric field disturbance during magnetic storms. A set of continuous 33‐day measurements of the geoelectric field, geomagnetic field, geomagnetic indices, and interplanetary magnetic field are analyzed. In the studied 33 days, two magnetic storms occurred after 10 geomagnetic quiet days. To exclude the effects from the different underground electrical structures, geomagnetic and geoelectric field measurements from the same ground observatory enrolled in Chinese Meridian Project are studied. Besides, Space Weather Modeling Framework is adopted to calculate the global geomagnetic field disturbances and the contribution from different current systems. The wavelet power spectra analysis reveals that the long‐period geoelectric field disturbance appears only during magnetic storms. Especially, stronger magnetic storm generates weaker geoelectric disturbances at the same observatory. The opposite‐direction eastward geomagnetic field disturbance, which is generated mainly by the field‐aligned current at different magnetic local time, significantly changes the magnitude and direction of the induced geoelectric field via the underground impedance tensor. Therefore, both the effects caused by ring current and field‐aligned current should be considered in analyzing the ground induced geoelectric field. Excluding the effect from the geospace current source, the more accurate electrical conductivity in the upper mantle would be obtained in future. |
| format | Article |
| id | doaj-art-140b92d2793f445e9f3b34c0220cc3d9 |
| institution | Kabale University |
| issn | 1542-7390 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Space Weather |
| spelling | doaj-art-140b92d2793f445e9f3b34c0220cc3d92025-01-14T16:27:13ZengWileySpace Weather1542-73902020-01-01181n/an/a10.1029/2019SW002298Features and Source Current of Long‐Period Induced Geoelectric Field During Magnetic Storms: A Case StudyS. Y. Wu0S. Yao1X. D. Feng2W. B. Wei3Y. T. Yin4L. T. Zhang5H. Dong6G. W. Wang7J. L. Liu8Y. Q. Yu9D. Wei10School of Geophysics and Information Technology China University of Geosciences (Beijing) Beijing ChinaSchool of Geophysics and Information Technology China University of Geosciences (Beijing) Beijing ChinaSchool of Geophysics and Information Technology China University of Geosciences (Beijing) Beijing ChinaSchool of Geophysics and Information Technology China University of Geosciences (Beijing) Beijing ChinaSchool of Geophysics and Information Technology China University of Geosciences (Beijing) Beijing ChinaSchool of Geophysics and Information Technology China University of Geosciences (Beijing) Beijing ChinaSchool of Geophysics and Information Technology China University of Geosciences (Beijing) Beijing ChinaSchool of Geophysics and Information Technology China University of Geosciences (Beijing) Beijing ChinaPolar Research Institute of China Shanghai ChinaSchool of Space and Environment Beihang University Beijing ChinaSchool of Space and Environment Beihang University Beijing ChinaAbstract We present a case study on the long‐period ( >105 s) induced geoelectric field disturbance during magnetic storms. A set of continuous 33‐day measurements of the geoelectric field, geomagnetic field, geomagnetic indices, and interplanetary magnetic field are analyzed. In the studied 33 days, two magnetic storms occurred after 10 geomagnetic quiet days. To exclude the effects from the different underground electrical structures, geomagnetic and geoelectric field measurements from the same ground observatory enrolled in Chinese Meridian Project are studied. Besides, Space Weather Modeling Framework is adopted to calculate the global geomagnetic field disturbances and the contribution from different current systems. The wavelet power spectra analysis reveals that the long‐period geoelectric field disturbance appears only during magnetic storms. Especially, stronger magnetic storm generates weaker geoelectric disturbances at the same observatory. The opposite‐direction eastward geomagnetic field disturbance, which is generated mainly by the field‐aligned current at different magnetic local time, significantly changes the magnitude and direction of the induced geoelectric field via the underground impedance tensor. Therefore, both the effects caused by ring current and field‐aligned current should be considered in analyzing the ground induced geoelectric field. Excluding the effect from the geospace current source, the more accurate electrical conductivity in the upper mantle would be obtained in future.https://doi.org/10.1029/2019SW002298space weatherlong‐period induced geoelectric fieldmagnetic storm and substorminterplanetary coronal mass ejection |
| spellingShingle | S. Y. Wu S. Yao X. D. Feng W. B. Wei Y. T. Yin L. T. Zhang H. Dong G. W. Wang J. L. Liu Y. Q. Yu D. Wei Features and Source Current of Long‐Period Induced Geoelectric Field During Magnetic Storms: A Case Study Space Weather space weather long‐period induced geoelectric field magnetic storm and substorm interplanetary coronal mass ejection |
| title | Features and Source Current of Long‐Period Induced Geoelectric Field During Magnetic Storms: A Case Study |
| title_full | Features and Source Current of Long‐Period Induced Geoelectric Field During Magnetic Storms: A Case Study |
| title_fullStr | Features and Source Current of Long‐Period Induced Geoelectric Field During Magnetic Storms: A Case Study |
| title_full_unstemmed | Features and Source Current of Long‐Period Induced Geoelectric Field During Magnetic Storms: A Case Study |
| title_short | Features and Source Current of Long‐Period Induced Geoelectric Field During Magnetic Storms: A Case Study |
| title_sort | features and source current of long period induced geoelectric field during magnetic storms a case study |
| topic | space weather long‐period induced geoelectric field magnetic storm and substorm interplanetary coronal mass ejection |
| url | https://doi.org/10.1029/2019SW002298 |
| work_keys_str_mv | AT sywu featuresandsourcecurrentoflongperiodinducedgeoelectricfieldduringmagneticstormsacasestudy AT syao featuresandsourcecurrentoflongperiodinducedgeoelectricfieldduringmagneticstormsacasestudy AT xdfeng featuresandsourcecurrentoflongperiodinducedgeoelectricfieldduringmagneticstormsacasestudy AT wbwei featuresandsourcecurrentoflongperiodinducedgeoelectricfieldduringmagneticstormsacasestudy AT ytyin featuresandsourcecurrentoflongperiodinducedgeoelectricfieldduringmagneticstormsacasestudy AT ltzhang featuresandsourcecurrentoflongperiodinducedgeoelectricfieldduringmagneticstormsacasestudy AT hdong featuresandsourcecurrentoflongperiodinducedgeoelectricfieldduringmagneticstormsacasestudy AT gwwang featuresandsourcecurrentoflongperiodinducedgeoelectricfieldduringmagneticstormsacasestudy AT jlliu featuresandsourcecurrentoflongperiodinducedgeoelectricfieldduringmagneticstormsacasestudy AT yqyu featuresandsourcecurrentoflongperiodinducedgeoelectricfieldduringmagneticstormsacasestudy AT dwei featuresandsourcecurrentoflongperiodinducedgeoelectricfieldduringmagneticstormsacasestudy |