Vol. 33 No. 2 (1994)
Articles

Evaluación preliminar del campo geomagnético de referencia internacional IGRF-1990 para México y anomalías magnéticas corticales

E. Hérnandez Quintero
Instituto de Geofísica, UNAM, México.
H. Nolasco Chávez
Instituto de Geofísica, UNAM, México.
J. O. Campos Enríquez
Instituto de Geofísica, UNAM, México.
C. Cañon Amaro
Instituto de Geofísica, UNAM, México.
A. Orozco Torres
Instituto de Geofísica, UNAM, México.
J. Urrutia Fucugauchi
Instituto de Geofísica, UNAM, México.
G. Alvarez García
Instituto Nacional de Geografía, Estadística e Informática (INEGI), México.

Published 1994-04-01

Keywords

  • Geomagnetism,
  • International Geomagnetic Reference Field,
  • Mexico.
  • Geomagnetismo,
  • Campo Geomagnético de Referencia Internacional,
  • México.

How to Cite

Hérnandez Quintero, E., Nolasco Chávez, H., Campos Enríquez, J. O., Cañon Amaro, C., Orozco Torres, A., Urrutia Fucugauchi, J., & Alvarez García, G. (1994). Evaluación preliminar del campo geomagnético de referencia internacional IGRF-1990 para México y anomalías magnéticas corticales. Geofísica Internacional, 33(2), 235-241. https://doi.org/10.22201/igeof.00167169p.1994.33.2.472

Abstract

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.