Interpretation of the magnetic anomalies over the Mid-Atlantic Ocean Ridge using Swarm-A satellite

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Ozsoz I., PAMUKÇU O.

GEOFIZIKA, cilt.39, sa.1, ss.197-217, 2022 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 39 Sayı: 1
  • Basım Tarihi: 2022
  • Doi Numarası: 10.15233/gfz.2022.39.3
  • Dergi Adı: GEOFIZIKA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Directory of Open Access Journals
  • Sayfa Sayıları: ss.197-217
  • Anahtar Kelimeler: Keywords, SWARM, magnetic data processing, analytic signal, qualitative and, quantitative interpretation, FIELD, ALTITUDE, CRUSTAL, BODIES, MANTLE, CHAMP, MODEL, FLOOR
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

The procedures and interpretation of the magnetic data measured over the Mid-Atlantic Ocean Ridge by Swarm-A satellite is discussed in this paper. The data processing procedure has four phases after the data format conversion. The first phase is the selecting data whose Kp index is lower than 1. Secondly, the main magnetic field should be subtracted from the measured data for example through the IGRF model. This step is followed by removing trend, related to the satellite trajectory. The final step is eliminating the dipole nature of the magnetic field via Reduction to the Pole (RTP). Nonetheless, the RTP process might cause misinterpretation over the large study area and lower latitudes. Therefore, the amplitude of the analytic signal (AS) is used as an alternative to the RTP. The qualitative interpretation of the magnetic anomaly is conducted via AS anomaly, bathymetry, heat flow and tectonic map. Quantitatively correlation coefficients of bathymetry and heat flow with respect to AS are interpreted.