Naslov
Regional geomagnetic field model for Croatia at 2009.5

Autori
Vujić, Eugen ; Brkić, Mario ; Kovác, Peter

Izvornik
Acta geophysica (1895-6572) 64 (2016), 1; 26-42

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
geomagnetic repeat stations ; geomagnetic field model ; crustal field

Sažetak
Geomagnetic data of north, east and vertical components at Croatian repeat stations and ground survey sites, as well as European geomagnetic observatories and repeat stations, were used to obtain a regional geomagnetic model over Croatia at 2009.5 epoch. Different models were derived, depending on input data, and three modelling techniques were used: Taylor polynomial, Adjusted Spherical Harmonic Analysis and Spherical Harmonic Analysis. It was derived that the most accurate model over Croatia was the one when only Croatian data were used, and by using the Adjusted Spherical Harmonic Analysis. Based on Croatian repeat stations' data in interval 2007.5-2010.5, and a global Enhanced Magnetic Model, it was possible to estimate the crustal field at those sites. It was also done by taking into account the empirical adjustment for long-term external field variations. The higher crustal field values were found at those stations which are on or close to the Adriatic anomaly.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geologija

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