Geomagnetic activity during the passage of the earth through Halley's tail in 1910

Details Geomagnetic activity during the passage of the earth through Halley's tail in 1910 Geomagnetic activity during the passage of the earth through Halley's tail in 1910

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.333..338r&link_type=abstract

Nature (ISSN 0028-0836), vol. 333, May 26, 1988, p. 338-340. NASA-supported research.

Computer Science

2

Comet Tails, Geomagnetism, Halley'S Comet, Magnetic Disturbances, Earth Surface, Magnetoactivity, Solar Wind

Scientific paper

The magnetic disturbance expected when the earth passed through the center of Comet Halley's tail in 1910 apparently occurred 12 hr too early. A detailed study of the records reveals that the discrepancy is due to a change in the convention for determining the start of the day. The magnetic disturbance did in fact arrive at the expected time and no unusual aberration of the solar wind need be invoked to explain the timing. The disturbance consisted of two troughs in the horizontal component of the earth's magnetic field, separated by about 14 hr, presumably associated with wakes in the solar wind momentum flux on either side of the ion tail. The disturbance was independent of latitude, indicating that the responsible current system flowed far above the earth's surface. After the comet's passage the magnetosphere was left in a mildly disturbed condition, with a weak ring current present.

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