Physical meaning of the equinoctial effect for semi-annual variation in geomagnetic activity

Yoshida, A.

doi:https://doi.org/10.5194/angeo-27-1909-2009

Articles | Volume 27, issue 5

https://doi.org/10.5194/angeo-27-1909-2009

© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/angeo-27-1909-2009

© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 27, issue 5

04 May 2009

| 04 May 2009

Physical meaning of the equinoctial effect for semi-annual variation in geomagnetic activity

A. Yoshida

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Total article views: 1,920 (including HTML, PDF, and XML)

HTML	PDF	XML	Total	BibTeX	EndNote
894	956	70	1,920	87	113

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PDF: 956
XML: 70
Total: 1,920
BibTeX: 87
EndNote: 113

Views and downloads (calculated since 01 Feb 2013)

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Mar 2013	2	23	0	25
Apr 2013	2	9	1	12
May 2013	17	1	18
Jun 2013	6	18	0	24
Jul 2013	1	19	0	20
Aug 2013	10	18	2	30
Sep 2013	3	19	0	22
Oct 2013	4	19	0	23
Nov 2013	18	0	18
Dec 2013	4	11	2	17
Jan 2014	3	11	1	15
Feb 2014	5	13	2	20
Mar 2014	10	7	1	18
Apr 2014	10	0	10
May 2014	2	9	0	11
Jun 2014	1	13	0	14
Jul 2014	2	15	0	17
Aug 2014	3	11	0	14
Sep 2014	6	18	0	24
Oct 2014	31	0	31
Nov 2014	3	27	0	30
Dec 2014	1	15	0	16
Jan 2015	8	0	8
Feb 2015	3	1	1	5
Mar 2015	6	6	0	12
Apr 2015	8	0	8
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Aug 2015	5	5	0	10
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Oct 2015	8	1	0	9
Nov 2015	11	3	0	14
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Jan 2016	12	4	1	17
Feb 2016	8	2	1	11
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Oct 2019	1	10	0	11
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Jan 2020	6	5	1	12
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Mar 2020	1	4	0	5
Apr 2020	1	3	0	4
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Jun 2020	8	10	1	19
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Aug 2020	9	4	3	16
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Jan 2024	1	0	1
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May 2024	10	6	5	21
Jun 2024	6	5	2	13
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Aug 2024	13	4	3	20
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Feb 2025	18	14	3	35
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Apr 2025	8	16	0	24
May 2025	11	8	3	22
Jun 2025	30	16	0	46
Jul 2025	16	11	1	28
Aug 2025	12	17	2	31
Sep 2025	26	13	1	40
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Cumulative views and downloads (calculated since 01 Feb 2013)

Month	HTML	PDF	XML	Total
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Mar 2013	2	23	0	25
Apr 2013	2	9	1	12
May 2013	17	1	18
Jun 2013	6	18	0	24
Jul 2013	1	19	0	20
Aug 2013	10	18	2	30
Sep 2013	3	19	0	22
Oct 2013	4	19	0	23
Nov 2013	18	0	18
Dec 2013	4	11	2	17
Jan 2014	3	11	1	15
Feb 2014	5	13	2	20
Mar 2014	10	7	1	18
Apr 2014	10	0	10
May 2014	2	9	0	11
Jun 2014	1	13	0	14
Jul 2014	2	15	0	17
Aug 2014	3	11	0	14
Sep 2014	6	18	0	24
Oct 2014	31	0	31
Nov 2014	3	27	0	30
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Feb 2015	3	1	1	5
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Apr 2015	8	0	8
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Sep 2015	3	9	0	12
Oct 2015	8	1	0	9
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Feb 2016	8	2	1	11
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Oct 2021	4	21	0	25
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Oct 2024	6	3	0	9
Nov 2024	4	6	1	11
Dec 2024	3	8	0	11
Jan 2025	5	6	0	11
Feb 2025	18	14	3	35
Mar 2025	6	4	0	10
Apr 2025	8	16	0	24
May 2025	11	8	3	22
Jun 2025	30	16	0	46
Jul 2025	16	11	1	28
Aug 2025	12	17	2	31
Sep 2025	26	13	1	40
Oct 2025	5	2	0	7

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Latest update: 07 Oct 2025

Physical meaning of the equinoctial effect for semi-annual variation in geomagnetic activity

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