dor_id: 4133281

506.#.#.a: Público

590.#.#.d: Los artículos enviados a la revista "Geofísica Internacional", se juzgan por medio de un proceso de revisión por pares

510.0.#.a: Consejo Nacional de Ciencia y Tecnología (CONACyT); Scientific Electronic Library Online (SciELO); SCOPUS, Dialnet, Directory of Open Access Journals (DOAJ); Geobase

561.#.#.u: https://www.geofisica.unam.mx/

650.#.4.x: Físico Matemáticas y Ciencias de la Tierra

336.#.#.b: article

336.#.#.3: Artículo de Investigación

336.#.#.a: Artículo

351.#.#.6: http://revistagi.geofisica.unam.mx/index.php/RGI

351.#.#.b: Geofísica Internacional

351.#.#.a: Artículos

harvesting_group: RevistasUNAM

270.1.#.p: Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

590.#.#.c: Open Journal Systems (OJS)

270.#.#.d: MX

270.1.#.d: México

590.#.#.b: Concentrador

883.#.#.u: https://revistas.unam.mx/catalogo/

883.#.#.a: Revistas UNAM

590.#.#.a: Coordinación de Difusión Cultural

883.#.#.1: https://www.publicaciones.unam.mx/

883.#.#.q: Dirección General de Publicaciones y Fomento Editorial

850.#.#.a: Universidad Nacional Autónoma de México

856.4.0.u: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/707/698

100.1.#.a: Rangarajan, G. K.; Barreto, L. M.

524.#.#.a: Rangarajan, G. K., et al. (2000). Secular change in the location of the magnetic dip equator in the twentieth century. Geofísica Internacional; Vol. 39 Núm. 4: Octubre 1, 2000; 323-336. Recuperado de https://repositorio.unam.mx/contenidos/4133281

245.1.0.a: Secular change in the location of the magnetic dip equator in the twentieth century

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Instituto de Geofísica, UNAM

264.#.0.c: 2000

264.#.1.c: 2000-10-01

653.#.#.a: Ecuador magnético; variación secular; deriva al oeste; centro magnético; anomalía magnética del Atlántico del Sur; Dip equator; secular variation; westward drift; magnetic center; South Atlantic magnetic anomaly

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-SA 4.0 Internacional, https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.es, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico revistagi@igeofisica.unam.mx

884.#.#.k: http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/707

001.#.#.#: 063.oai:revistagi.geofisica.unam.mx:article/707

041.#.7.h: spa

520.3.#.a: Using the spherical harmonic coefficients defining the International Geomagnetic Reference Field Models for the 21 epochs 1900 to 2000, the geographic locations of the dip equator in different longitudes were computed. It is shown that the migratory trends in the dip equator are widely different in the American, African and Indian sectors.The largest change is seen over 30°W to 40°W while there is practically no secular movement over 100 years in the 30°E longitude. It is seen that the geographic longitude of the dip equator farthest away from the geographic equator in the American sector shows a westward migration at the rate of ~0.2°/year which compares favorably with the average westward drift of the non-dipolar field discussed in the literature. The distance between the magnetic center of the eccentric dipole and the Earth’s center, the South Atlantic Geomagnetic Anomaly (SAGA) center and the migration of the local minimum of the dip equatorial longitude in the American center are all linearly related. In addition, the westward drift in the agonic line over the geographic equator in the American sector, indicative of the contributions from non-dipolar terms, is also linearly related to the three parameters. As the observed location of the dip equator in the American sector closely matches the model-based one, it is suggested that identification of the geographic longitude of the dip equator in the American zone based on a survey over a small area can provide useful information on several other parameters of the westward drift of the geomagnetic field.doi: https://doi.org/10.22201/igeof.00167169p.2000.39.4.243

773.1.#.t: Geofísica Internacional; Vol. 39 Núm. 4: Octubre 1, 2000; 323-336

773.1.#.o: http://revistagi.geofisica.unam.mx/index.php/RGI

022.#.#.a: ISSN-L: 2954-436X; ISSN impreso: 0016-7169

310.#.#.a: Trimestral

300.#.#.a: Páginas: 323-336

264.#.1.b: Instituto de Geofísica, UNAM

doi: https://doi.org/10.22201/igeof.00167169p.2000.39.4.243

handle: 008d375fae51ff61

harvesting_date: 2023-06-20 16:00:00.0

856.#.0.q: application/pdf

file_creation_date: 2000-10-19 13:11:27.0

file_modification_date: 2022-07-13 19:31:33.0

file_creator: G.K. Rangarajan and L.M. Barreto

file_name: 78f79e34c68b99875bda2d2f583b9f356811022129f2248677d991a960b2bdaf.pdf

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245.1.0.b: Secular change in the location of the magnetic dip equator in the twentieth century

last_modified: 2023-06-20 16:00:00

license_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.es

license_type: by-nc-sa

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