Evaluación preliminar del campo geomagnético de referencia internacional IGRF-1990 para México y anomalías magnéticas corticales
A regional comparison between the International Geomagnetic Reference Field (IGRF) for 1990 and the observed geomagnetic field derived from measurements taken at 51 localities is reported. The IGRF model provides a satisfactory reference field for Mexico. The differences between the IGRF model and t...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1994 |
| País: | México |
| Institución: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Geofísica Internacional |
| Idioma: | español |
| OAI Identifier: | oai:revistagi.geofisica.unam.mx:article/492 |
| Acceso en línea: | http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/492 |
| Access Level: | acceso abierto |
| Palabra clave: | Geomagnetismo Campo Geomagnético de Referencia Internacional México Geomagnetism International Geomagnetic Reference Field Mexico |
| Sumario: | A regional comparison between the International Geomagnetic Reference Field (IGRF) for 1990 and the observed geomagnetic field derived from measurements taken at 51 localities is reported. The IGRF model provides a satisfactory reference field for Mexico. The differences between the IGRF model and the observed field seem to define regional anomalies. The total field mean difference is 10.6 nT, with a root mean square (RMS) deviation of 206 nT. Corresponding mean differences for the horizontal component and the declination are 24.4 nT and -0.6', with RMS deviations of 116 nT and 18.7', respectively. Long-wavelength features in the total field correlate with aeromagnetic and satellite magnetic anomalies, which suggests a possible association with crustal sources. |
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