Elevated paleomagnetic dispersion at Saint Helena suggests long-lived anomalous behavior in the South Atlantic

• Published in: Proceedings of the National Academy of Sciences - PNAS Vol. 117; no. 31; pp. 18258 - 18263
• Main Authors: Engbers, Yael A., Biggin, Andrew J., Bono, Richard K.
• Format: Journal Article
• Language: English
• Published: United States National Academy of Sciences 04.08.2020
• Subjects: Dipoles; Dispersion; Earth surface; Geology; Geomagnetic field; Geomagnetism; Magnetic fields; Magnetism; Paleomagnetism; Physical Sciences; Polarity; Secular variations; Volcanic islands; United States > US; Atlantic Ocean; reversals; secular variation; core dynamics; core−mantle boundary; South Atlantic Anomaly

Earth’s magnetic field is presently characterized by a large and growing anomaly in the South Atlantic Ocean. The question of whether this region of Earth’s surface is preferentially subject to enhanced geomagnetic variability on geological timescales has major implications for core dynamics, core−m...