| 1. Identity statement | ||||
| Reference Type | Journal Article | |||
| Site | mtc-m21c.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Identifier | 8JMKD3MGP3W34R/44LJCFP | |||
| Repository | sid.inpe.br/mtc-m21c/2021/05.10.16.02 | |||
| Last Update | 2021:05.10.16.02.31 (UTC) administrator | |||
| Metadata Repository | sid.inpe.br/mtc-m21c/2021/05.10.16.02.31 | |||
| Metadata Last Update | 2022:04.03.19.24.42 (UTC) administrator | |||
| DOI | 10.1029/2020JA028695 | |||
| ISSN | 2169-9402 | |||
| Citation Key | HajraFranEcheBolz:2021:CoThSt | |||
| Title | Long-Term Variations of the Geomagnetic Activity: A Comparison Between the Strong and Weak Solar Activity Cycles and Implications for the Space Climate  | |||
| Year | 2021 | |||
| Month | Apr. | |||
| Access Date | 2024, May 17 | |||
| Type of Work | journal article | |||
| Secondary Type | PRE PI | |||
| Number of Files | 1 | |||
| Size | 2761 KiB | |||
| 2. Context | ||||
| Author | 1 Hajra, Rajkumar 2 Franco, Adriane Marques de Souza 3 Echer, Ezequiel 4 Bolzan, Maurício José Alves | |||
| Resume Identifier | 1 2 3 8JMKD3MGP5W/3C9JH3D | |||
| ORCID | 1 0000-0003-0447-1531 2 0000-0003-4729-0925 3 0000-0002-8351-6779 4 0000-0002-6037-5483 | |||
| Group | 1 2 GES-CEA-DIPGR-INPE-MCTI-GOV-BR 3 DIHPA-CGCE-INPE-MCTI-GOV-BR | |||
| Affiliation | 1 Indian Institute of Technology Indore 2 Instituto Nacional de Pesquisas Espaciais (INPE) 3 Instituto Nacional de Pesquisas Espaciais (INPE) 4 Universidade Federal de Jataí | |||
| Author e-Mail Address | 1 rajkumarhajra@yahoo.co.in 2 3 ezequiel.echer@gmail.com | |||
| Journal | Journal of Geophysical Research: Space Physics | |||
| Volume | 126 | |||
| Number | 4 | |||
| Pages | e2020JA028695 | |||
| History (UTC) | 2021-05-10 16:02:31 :: simone -> administrator :: 2021-05-10 16:02:32 :: administrator -> simone :: 2021 2021-05-10 16:03:09 :: simone -> administrator :: 2021 2022-04-03 19:24:42 :: administrator -> simone :: 2021 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Content Type | External Contribution | |||
| Version Type | publisher | |||
| Abstract | We study the long-term variations of geomagnetic activity using more than five solar cycles of geomagnetic and solar wind observations. From the Dst index variation, 1523 geomagnetic storms were identified during January 1957 through December 2019, and 145 high-intensity long-duration continuous auroral electrojet (AE) activity (HILDCAA) events were identified using the AE index from January 1975 through December 2017. Among the storms, ∼3/4th were moderate (−50 nT ≥ Dst > −100 nT), and only ∼1/4th were stronger in intensity (Dst ≤ −100 nT). Cross-correlation analysis reveals a strong correlation (r = 0.58−0.78) between the magnetic storms and the F10.7 solar flux at 0−1-year time lag and a weaker correlation (r = 0.59) between HILDCAAs and F10.7 at a ∼3-year lag. This result is consistent with the magnetic storm occurrence rate centered around the solar cycle maximum with a secondary peak after the maximum, and HILDCAAs peaking around the descending phase. Wavelet analysis reveals a dominating ∼1011-year periodicity in the number of geomagnetic storms and HILDCAAs, geomagnetic activity indices, solar wind, and interplanetary parameters. The periodicity is attributed to the solar activity cycle variation. Solar wind speed induces additional longer (∼15−16 years) and shorter (∼3−5 years) scale variations in geomagnetic activity. Solar cycles 20 and 24 are found to be significantly weaker compared to the cycles 19, 21, 22, and 23 in solar flux, solar wind-magnetosphere coupling, and resultant geomagnetic activity. If the decreasing trend of the solar and geomagnetic activities continues in cycle 25, this may have important implications for the space weather science and operations. | |||
| Area | CEA | |||
| Arrangement 1 | urlib.net > BDMCI > Fonds > Produção pgr ATUAIS > GES > Long-Term Variations of... | |||
| Arrangement 2 | urlib.net > BDMCI > Fonds > Produção a partir de 2021 > CGCE > Long-Term Variations of... | |||
| doc Directory Content | access | |||
| source Directory Content | there are no files | |||
| agreement Directory Content |
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| 4. Conditions of access and use | ||||
| data URL | http://urlib.net/ibi/8JMKD3MGP3W34R/44LJCFP | |||
| zipped data URL | http://urlib.net/zip/8JMKD3MGP3W34R/44LJCFP | |||
| Language | en | |||
| Target File | 2020JA028695.pdf | |||
| User Group | simone | |||
| Visibility | shown | |||
| Archiving Policy | denypublisher6 allowfinaldraft | |||
| Read Permission | allow from all | |||
| Update Permission | not transferred | |||
| 5. Allied materials | ||||
| Next Higher Units | 8JMKD3MGPCW/3F2PBEE 8JMKD3MGPCW/46KTFK8 | |||
| Citing Item List | sid.inpe.br/mtc-m21/2012/07.13.14.45.47 3 sid.inpe.br/bibdigital/2013/10.12.21.02 1 sid.inpe.br/bibdigital/2022/04.03.17.52 1 | |||
| Dissemination | WEBSCI; AGU; MGA; COMPENDEX. | |||
| Host Collection | urlib.net/www/2017/11.22.19.04 | |||
| 6. Notes | ||||
| Empty Fields | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel e-mailaddress format isbn keywords label lineage mark mirrorrepository nextedition notes parameterlist parentrepositories previousedition previouslowerunit progress project readergroup rightsholder schedulinginformation secondarydate secondarykey secondarymark session shorttitle sponsor subject tertiarymark tertiarytype url | |||
| 7. Description control | ||||
| e-Mail (login) | simone | |||
| update | ||||