Spatial distribution of historical geomagnetic measurements in Mexico. (June 2020)

• Record Type: Journal Article
• Authors: Hernández-Quintero, Esteban; Goguitchaichvili, Avto; Cejudo, Rubén; Cifuentes, Gerardo; García, Rafael; Cervantes, Miguel
• Is Part Of: Journal of South American earth sciences. Volume 100(2020)
• Publication Date: 2020-06
• Subjects: Geomagnetism -- Declination -- Inclination -- Total intensity -- Historical record -- Spatial distribution; Geology -- Latin America -- Periodicals; Earth sciences -- Latin America -- Periodicals; Geology -- Antarctica -- Periodicals; Earth sciences -- Antarctica -- Periodicals; Geology -- Caribbean Area -- Periodicals; Earth sciences -- Caribbean Area -- Periodicals; Géologie -- Amérique latine -- Périodiques; Sciences de la terre -- Amérique latine -- Périodiques; Géologie -- Antarctique -- Périodiques; Sciences de la terre -- Antarctique -- Périodiques; Géologie -- Caraïbes (Région) -- Périodiques; Sciences de la terre -- Caraïbes (Région) -- Périodiques; Earth sciences; Geology; Antarctica; Caribbean Area; Latin America; Periodicals; 550.5
• DOI: 10.1016/j.jsames.2020.102556
• Languages: English
• ISSNs: 0895-9811

Abstract

Abstract: The spatial analysis of the geomagnetic field through time allows obtaining some crucial information about the evolution of the Earth's deep interiors and outer core-mantle conditions. Apart from discrete palaeomagnetic and archaeomagnetic records, the direct magnetic measurements of declination, inclination and intensity may largely contribute to unearthing historical geomagnetic distribution maps. The available historical data in Mexico (https://doi.org/10.1016/j.pepi.2020.106433, Physics of the Earth and Planetary Interiors 300, 2020, 106433) may be divided into two large groups: Data from the different observatories in Mexico between 1879 and 2018 (139 years); and the historical values of magnetic cartography accumulated in several documents between 1587 and 2018 (431 years). Part of the specific objectives of magnetic mapping in Mexico is the estimation and analysis of the local and global behavior of the geomagnetic phenomena. The historical geomagnetic record gathers data on the declination, inclination and total geomagnetic intensity obtained initially by sailors that represent a unique scientific heritage in Latin America. Highlights: The historical geomagnetic record gathers data on the declination, inclination and total geomagnetic intensity. Direct magnetic measurements largely contribute to unearth historical geomagnetic distribution maps. The Magnetic Declination distribution allows to detect the possible influence of the Westward Drift. Geomagnetic intensity decreased during the last century nearly 9% in agreement with worldwide data.