Heliolatitude regularities of magnetically disturbed days with daily average geomagnetic index Dst<–100 nT
This paper considers storm days for a period 1966–2015 when the daily average geomagnetic Dst index was <–100 nT. The distribution of the number of days with a high daily average Dst is shown to depend on Earth’s heliolatitude φ: the number of days increases with the absolute value of φ in both s...
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| Format: | Article |
| Language: | English |
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INFRA-M
2018-09-01
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| Series: | Solar-Terrestrial Physics |
| Subjects: | |
| Online Access: | https://naukaru.ru/en/nauka/article/23004/view |
| _version_ | 1830212015933620224 |
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| author | Makarov G.A. |
| author_facet | Makarov G.A. |
| author_sort | Makarov G.A. |
| collection | DOAJ |
| description | This paper considers storm days for a period 1966–2015 when the daily average geomagnetic Dst index was <–100 nT. The distribution of the number of days with a high daily average Dst is shown to depend on Earth’s heliolatitude φ: the number of days increases with the absolute value of φ in both solar hemispheres. It is found, as expected, that the seasonal distribution of storm days with Dst<–100 nT has equinoctial maxima. Moreover, there is a noticeable increase in the number of such days in July and November. It is noted that at Earth’s heliolatitudes 4.1°–5.0° there is a sharp increase in the number of storm days. It is established that this increase occurs during storm events in July and November, which stand out against the seasonal distribution of highly disturbed days. |
| first_indexed | 2024-12-18T05:53:47Z |
| format | Article |
| id | doaj.art-148f475953b54cf38d67fac4f33760a4 |
| institution | Directory Open Access Journal |
| issn | 2500-0535 |
| language | English |
| last_indexed | 2024-12-18T05:53:47Z |
| publishDate | 2018-09-01 |
| publisher | INFRA-M |
| record_format | Article |
| series | Solar-Terrestrial Physics |
| spelling | doaj.art-148f475953b54cf38d67fac4f33760a42022-12-21T21:18:50ZengINFRA-MSolar-Terrestrial Physics2500-05352018-09-0143202310.12737/stp-43201803Heliolatitude regularities of magnetically disturbed days with daily average geomagnetic index Dst<–100 nTMakarov G.A. 0Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS, Yakutsk, RussiaThis paper considers storm days for a period 1966–2015 when the daily average geomagnetic Dst index was <–100 nT. The distribution of the number of days with a high daily average Dst is shown to depend on Earth’s heliolatitude φ: the number of days increases with the absolute value of φ in both solar hemispheres. It is found, as expected, that the seasonal distribution of storm days with Dst<–100 nT has equinoctial maxima. Moreover, there is a noticeable increase in the number of such days in July and November. It is noted that at Earth’s heliolatitudes 4.1°–5.0° there is a sharp increase in the number of storm days. It is established that this increase occurs during storm events in July and November, which stand out against the seasonal distribution of highly disturbed days.https://naukaru.ru/en/nauka/article/23004/viewgeomagnetic Dst indexgeomagnetic stormseasonal variation of magnetic activityEarth’s heliolatitude |
| spellingShingle | Makarov G.A. Heliolatitude regularities of magnetically disturbed days with daily average geomagnetic index Dst<–100 nT Solar-Terrestrial Physics geomagnetic Dst index geomagnetic storm seasonal variation of magnetic activity Earth’s heliolatitude |
| title | Heliolatitude regularities of magnetically disturbed days with daily average geomagnetic index Dst<–100 nT |
| title_full | Heliolatitude regularities of magnetically disturbed days with daily average geomagnetic index Dst<–100 nT |
| title_fullStr | Heliolatitude regularities of magnetically disturbed days with daily average geomagnetic index Dst<–100 nT |
| title_full_unstemmed | Heliolatitude regularities of magnetically disturbed days with daily average geomagnetic index Dst<–100 nT |
| title_short | Heliolatitude regularities of magnetically disturbed days with daily average geomagnetic index Dst<–100 nT |
| title_sort | heliolatitude regularities of magnetically disturbed days with daily average geomagnetic index dst 100 nt |
| topic | geomagnetic Dst index geomagnetic storm seasonal variation of magnetic activity Earth’s heliolatitude |
| url | https://naukaru.ru/en/nauka/article/23004/view |
| work_keys_str_mv | AT makarovga heliolatituderegularitiesofmagneticallydisturbeddayswithdailyaveragegeomagneticindexdst100nt |