Location of the North Magnetic Pole in April 2007

• Published in: Earth, Planets and Space
• Main Authors: Newitt, L. R., Chulliat, A., Orgeval, J. -J.
• Other Authors: Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2009
• Subjects: [SDU]Sciences of the Universe [physics]; Geomagnetic Pole; North Magnetic Pole
• Online Access: https://insu.hal.science/insu-03604901; https://insu.hal.science/insu-03604901/document; https://insu.hal.science/insu-03604901/file/BF03353178.pdf; https://doi.org/10.1186/BF03353178

International audience Observations have been made at five locations in the vicinity of the North Magnetic Pole (NMP)νll. These were used in four different analyses -- virtual geomagnetic pole, simple polynomial, spherical cap harmonic, best fitting grid -- to derive positions of the NMP. The average position at 2007.3 was 83.95°N, 120.72°W, with a positional uncertainty of 40 km. This position is only 27 km from the pole position given by the CHAOS magnetic model. The NMP continues to move in a northwesterly direction but its drift speed has stabilized at just over 50 km per year. The number of direct observations is insufficient to determine if the NMP has started to decelerate.