New evidence for extraordinarily rapid change of the geomagnetic field during a reversal

Details New evidence for extraordinarily rapid change of the geomagnetic field during a reversal New evidence for extraordinarily rapid change of the geomagnetic field during a reversal

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995natur.374..687c&link_type=abstract

Nature, Volume 374, Issue 6524, pp. 687-692 (1995).

Physics

23

Scientific paper

Palaeomagnetic results from lava flows recording a geomagnetic polarity reversal at Steens Mountain, Oregon suggest the occurrence of brief episodes of astonishingly rapid field change of six degrees per day. The evidence is large, systematic variations in the direction of remanent magnetization as a function of the temperature of thermal demagnetization and of vertical position within a single flow, which are most simply explained by the hypothesis that the field was changing direction as the flow cooled.

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