| Autor: |
Kalpesh Ghag, Bhagyashri Sathe, Anil Raghav, Zubair Shaikh, Digvijay Mishra, Ankush Bhaskar, Tarun Kumar Pant, Omkar Dhamane, Prathmesh Tari, Prachi Pathare, Vinit Pawaskar, Kishor Kumbhar, Greg Hilbert |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Universe, Vol 9, Iss 8, p 350 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2218-1997 |
| DOI: |
10.3390/universe9080350 |
| Popis: |
Interplanetary coronal mass ejections (ICME) are large-scale eruptions from the Sun and prominent drivers of space weather disturbances, especially intense/extreme geomagnetic storms. Recent studies by our group showed that ICME sheaths and/or magnetic clouds (MC) could be transformed into a planar magnetic structure (PMS) and speculate that these structures might be more geo-effective. Thus, we statistically investigated the geo-effectiveness of planar and non-planar ICME sheaths and MC regions. We analyzed 420 ICME events observed from 1998 to 2017, and we found that the number of intense (−100 to −200 nT) and extreme (<−200 nT) geomagnetic storms are large during planar ICMEs (almost double) compared to non-planar ICMEs. In fact, almost all the extreme storm events occur during PMS molded ICME crossover. The observations suggest that planar structures are more geo-effective than non-planar structures. Thus, the current study helps us to understand the energy transfer mechanism from the ICME/solar wind into the magnetosphere, and space-weather events. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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