Development of an auroral absorption substorm - Studies of substorm related absorption events in the afternoon-early evening sector

Details Development of an auroral absorption substorm - Studies of substorm related absorption events in the afternoon-early evening sector Development of an auroral absorption substorm - Studies of substorm related absorption events in the afternoon-early evening sector

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983p%26ss...31.1415r&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 31, Dec. 1983, p. 1415-1421, 1423-1434. Research supported by the Academy of

Physics

9

Auroral Absorption, Evening, Magnetic Storms, Particle Precipitation, Polar Substorms, Diurnal Variations, Energetic Particles, Magnetic Flux

Scientific paper

Northern-Hemisphere afternoon/evening-sector observations of auroral absorption substorms on November 3, 1975, September 28, 1977, and February 14, 1976, obtained with the Finnish riometer chain, a large number of additional riometer stations, and seven pulsation-magnetometer stations are reported in tables and graphs and discussed. The events considered occurred during magnetically disturbed periods (Kp greater than 3), with substorm onset in the magnetic midnight sector. The main features observed are a southward-moving preonset absorption bay, rapid westward propagation (separately at high and low L) of the onset, and slowly varying absorption (without pulsation activity) at L = 3-4 about 1 h after onset; these features are characterized in detail. The westward propagation correlates with PiB or IPDP magnetic-pulsation activity at L greater than about 6 or less than 4.8, respectively.

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