| 1. Identity statement | ||||
| Reference Type | Journal Article | |||
| Site | mtc-m21c.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Identifier | 8JMKD3MGP3W34R/3T3HSMP | |||
| Repository | sid.inpe.br/mtc-m21c/2019/04.02.16.38 (restricted access) | |||
| Last Update | 2019:04.02.16.38.34 (UTC) simone | |||
| Metadata Repository | sid.inpe.br/mtc-m21c/2019/04.02.16.38.34 | |||
| Metadata Last Update | 2022:03.18.22.11.29 (UTC) administrator | |||
| DOI | 10.1029/2018SW002094 | |||
| ISSN | 1542-7390 | |||
| Citation Key | EspinosaSarmientoPadiAlve:2019:CaStLo | |||
| Title | Effects of ionospheric conductivity and ground conductance on geomagnetically induced currents during geomagnetic storms: case studies at low-latitude and Equatorial regions  | |||
| Year | 2019 | |||
| Month | Feb. | |||
| Access Date | 2024, May 17 | |||
| Type of Work | journal article | |||
| Secondary Type | PRE PI | |||
| Number of Files | 1 | |||
| Size | 3553 KiB | |||
| 2. Context | ||||
| Author | 1 Espinosa Sarmiento, Karen Viviana 2 Padilha, Antonio Lopes 3 Alves, Livia Ribeiro | |||
| Resume Identifier | 1 2 8JMKD3MGP5W/3C9JGJG | |||
| Group | 1 GESAST-CEA-SESPG-INPE-MCTIC-GOV-BR 2 DIDGE-CGCEA-INPE-MCTIC-GOV-BR 3 DIDGE-CGCEA-INPE-MCTIC-GOV-BR | |||
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais (INPE) 2 Instituto Nacional de Pesquisas Espaciais (INPE) 3 Instituto Nacional de Pesquisas Espaciais (INPE) | |||
| Author e-Mail Address | 1 karen.sarmiento@inpe.br 2 antonio.padilha@inpe.br 3 livia.alves@inpe.br | |||
| Journal | Space Weather | |||
| Volume | 17 | |||
| Number | 2 | |||
| Pages | 252-268 | |||
| Secondary Mark | B1_INTERDISCIPLINAR B1_GEOCIÊNCIAS B2_ASTRONOMIA_/_FÍSICA | |||
| History (UTC) | 2019-04-02 16:38:44 :: simone -> administrator :: 2019 2022-03-18 22:11:29 :: administrator -> simone :: 2019 | |||
| 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 | Geomagnetic field variations recorded by fluxgate magnetometers are used to evaluate geomagnetically induced currents (GICs) under the equatorial electrojet (EEJ) and South Atlantic Magnetic Anomaly (SAMA) during two geomagnetic storms in March and June 2015. Geomagnetic stations with information about the underground electrical conductivity structure and that can be approximated by unidimensional (1-D) models for calculation of the geoelectric field are selected. GICs levels are estimated using a realistic local power grid model located in the central region of Brazil, artificially moved to the sites where the geomagnetic measurements are available. GIC magnitudes are not large during the storms, and a maximum amplitude of 3.8 A was estimated at an equatorial station positioned over high resistivity underground during the main phase of the June storm. Effects of the ionospheric currents over the measurement sites and of the conductivity distribution beneath these sites are also evaluated. It is observed that both (EEJ) and (SAMA) increase the GICs amplitudes, with the greatest effects associated with daytime (EEJ) currents. A cutoff frequency was identified for both the (EEJ) and (SAMA) so that signals with frequencies lower than 2 mHz (periods longer than 500 s) are not amplified by the ionospheric currents. In relation to the underlying conductivity structure, GIC magnitude is affected by variation of the surface impedance and the sampling rate of the geomagnetic field. In our case, differences in amplitude of the surface impedance at the Nyquist frequency control the relative effects of the ground conductance between the stations. | |||
| Area | CEA | |||
| Arrangement 1 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDGE > Effects of ionospheric... | |||
| Arrangement 2 | urlib.net > BDMCI > Fonds > Produção pgr ATUAIS > GES > Effects of ionospheric... | |||
| doc Directory Content | access | |||
| source Directory Content | there are no files | |||
| agreement Directory Content |
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| 4. Conditions of access and use | ||||
| Language | en | |||
| Target File | Espinosa_et_al-2019-Space_Weather.pdf | |||
| User Group | simone | |||
| Reader Group | administrator simone | |||
| Visibility | shown | |||
| Read Permission | deny from all and allow from 150.163 | |||
| Update Permission | not transferred | |||
| 5. Allied materials | ||||
| Next Higher Units | 8JMKD3MGPCW/3EU29DP 8JMKD3MGPCW/3F2PBEE | |||
| Citing Item List | sid.inpe.br/bibdigital/2013/10.01.22.11 4 sid.inpe.br/mtc-m21/2012/07.13.14.40.26 2 | |||
| Dissemination | WEBSCI; SCOPUS. | |||
| Host Collection | urlib.net/www/2017/11.22.19.04 | |||
| 6. Notes | ||||
| Empty Fields | alternatejournal archivingpolicy archivist callnumber copyholder copyright creatorhistory descriptionlevel e-mailaddress format isbn keywords label lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project rightsholder schedulinginformation secondarydate secondarykey session shorttitle sponsor subject tertiarymark tertiarytype url | |||
| 7. Description control | ||||
| e-Mail (login) | simone | |||
| update | ||||