TY - JOUR AU - Courtillot, V. AU - Le Mouël, J-L PY - 2007// TI - The study of Earth's magnetism (1269–1950): A foundation by Peregrinus and subsequent development of geomagnetism and paleomagnetism JO - Reviews of geophysics VL - 45 PB - American Geophysical Union KW - history KW - geomagnetism KW - paleomagnetism KW - 1599 Geomagnetism and Paleomagnetism: General or miscellaneous KW - 1714 History of Geophysics: Geomagnetism and paleomagnetism KW - 5440 Planetary Sciences: Solid Surface Planets: Magnetic fields and magnetism KW - 7999 Space Weather: General or miscellaneous KW - 9820 General or Miscellaneous: Techniques applicable in three or more fields N2 - This paper summarizes the histories of geomagnetism and paleomagnetism (1269–1950). The role of Peregrinus is emphasized. In the sixteenth century a debate on local versus global departures of the field from that of an axial dipole pitted Gilbert against Le Nautonier. Regular measurements were undertaken in the seventeenth century. At the turn of the nineteenth century, de Lamanon, de Rossel, and von Humboldt discovered the decrease of intensity as one approaches the equator. Around 1850, three figures of rock magnetism were Fournet (remanent and induced magnetizations), Delesse (remagnetization in a direction opposite to the original), and Melloni (direction of lava magnetization acquired at time of cooling). Around 1900, Brunhes discovered magnetic reversals. In the 1920s, Chevallier produced the first magnetostratigraphy and hypothesized that poles had undergone enormous displacements. Matuyama showed that the Earth's field had reversed before the Pleistocene. Our review ends in the 1940s, when exponential development of geomagnetism and paleomagnetism starts. SN - 8755-1209 UR - http://dx.doi.org/10.1029/2006RG000198 N1 - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=5486), last updated on Wed, 15 Apr 2009 14:15:15 +0200 ID - Courtillot+LeMouel2007 ER -