Observations of Geomagnetic Crochet at High‐Latitudes Due To X1.5 Class Solar Flare on 3 July 2021
Abstract On 3 July 2021, an X1.5 solar flare from the National Oceanic and Atmospheric Administration solar Active Region AR12838 (24°N, 88°W) occurred at 14:18 UT, peaked at 14:29 UT, and decayed at 14:34 UT. The study of this X1.5 solar flare is significant due to its unique geomagnetic crochet fe...
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| Format: | Article |
| Language: | English |
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Wiley
2024-02-01
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| Series: | Space Weather |
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| Online Access: | https://doi.org/10.1029/2023SW003719 |
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| author | S. S. Rao Nandita Srivastava Monti Chakraborty Sandeep Kumar D. Chakrabarty |
| author_facet | S. S. Rao Nandita Srivastava Monti Chakraborty Sandeep Kumar D. Chakrabarty |
| author_sort | S. S. Rao |
| collection | DOAJ |
| description | Abstract On 3 July 2021, an X1.5 solar flare from the National Oceanic and Atmospheric Administration solar Active Region AR12838 (24°N, 88°W) occurred at 14:18 UT, peaked at 14:29 UT, and decayed at 14:34 UT. The study of this X1.5 solar flare is significant due to its unique geomagnetic crochet feature at high latitudes and its effective signature on Earth. The study examined X‐rays, the extreme ultraviolet spectrum, ionospheric equivalent current (IEC), and geomagnetic field components. The study reveals a sudden increase in IEC during the X1.5 flare episode, forming a zonal current region and producing a geomagnetic crochet signature in geomagnetic field components at high latitudes (50°–80°N) along the 11°–26°E longitude sector during the flare peak time. All three geomagnetic field components show different sensitivity to the solar flare effect (sfe), and the amplitude and phase of the geomagnetic crochet across latitudes (for a given longitude) are consistent with the variations in the IEC. The present study is the first to appraise geomagnetic crochets of low magnitude (8–40 nT) and short duration (10–15 min) at high latitudes, particularly in the polar cusp region, during the X‐class limb flare. |
| format | Article |
| id | doaj-art-c9e0a5f9669745d18739a01ce60b2b36 |
| institution | Kabale University |
| issn | 1542-7390 |
| language | English |
| publishDate | 2024-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Space Weather |
| spelling | doaj-art-c9e0a5f9669745d18739a01ce60b2b362025-01-14T16:30:41ZengWileySpace Weather1542-73902024-02-01222n/an/a10.1029/2023SW003719Observations of Geomagnetic Crochet at High‐Latitudes Due To X1.5 Class Solar Flare on 3 July 2021S. S. Rao0Nandita Srivastava1Monti Chakraborty2Sandeep Kumar3D. Chakrabarty4Udaipur Solar Observatory Physical Research Laboratory Udaipur IndiaUdaipur Solar Observatory Physical Research Laboratory Udaipur IndiaDepartmentof Electronics and Communication Engineering Tripura University Agartala IndiaUdaipur Solar Observatory Physical Research Laboratory Udaipur IndiaSpace and Atmospheric Sciences Division Physical Research Laboratory Ahmedabad Ahmedabad IndiaAbstract On 3 July 2021, an X1.5 solar flare from the National Oceanic and Atmospheric Administration solar Active Region AR12838 (24°N, 88°W) occurred at 14:18 UT, peaked at 14:29 UT, and decayed at 14:34 UT. The study of this X1.5 solar flare is significant due to its unique geomagnetic crochet feature at high latitudes and its effective signature on Earth. The study examined X‐rays, the extreme ultraviolet spectrum, ionospheric equivalent current (IEC), and geomagnetic field components. The study reveals a sudden increase in IEC during the X1.5 flare episode, forming a zonal current region and producing a geomagnetic crochet signature in geomagnetic field components at high latitudes (50°–80°N) along the 11°–26°E longitude sector during the flare peak time. All three geomagnetic field components show different sensitivity to the solar flare effect (sfe), and the amplitude and phase of the geomagnetic crochet across latitudes (for a given longitude) are consistent with the variations in the IEC. The present study is the first to appraise geomagnetic crochets of low magnitude (8–40 nT) and short duration (10–15 min) at high latitudes, particularly in the polar cusp region, during the X‐class limb flare.https://doi.org/10.1029/2023SW003719solar flaregeomagnetic crochethigh latitudesolar active regionionospheric equivalent currentpolar cusp |
| spellingShingle | S. S. Rao Nandita Srivastava Monti Chakraborty Sandeep Kumar D. Chakrabarty Observations of Geomagnetic Crochet at High‐Latitudes Due To X1.5 Class Solar Flare on 3 July 2021 Space Weather solar flare geomagnetic crochet high latitude solar active region ionospheric equivalent current polar cusp |
| title | Observations of Geomagnetic Crochet at High‐Latitudes Due To X1.5 Class Solar Flare on 3 July 2021 |
| title_full | Observations of Geomagnetic Crochet at High‐Latitudes Due To X1.5 Class Solar Flare on 3 July 2021 |
| title_fullStr | Observations of Geomagnetic Crochet at High‐Latitudes Due To X1.5 Class Solar Flare on 3 July 2021 |
| title_full_unstemmed | Observations of Geomagnetic Crochet at High‐Latitudes Due To X1.5 Class Solar Flare on 3 July 2021 |
| title_short | Observations of Geomagnetic Crochet at High‐Latitudes Due To X1.5 Class Solar Flare on 3 July 2021 |
| title_sort | observations of geomagnetic crochet at high latitudes due to x1 5 class solar flare on 3 july 2021 |
| topic | solar flare geomagnetic crochet high latitude solar active region ionospheric equivalent current polar cusp |
| url | https://doi.org/10.1029/2023SW003719 |
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