Other
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..259b&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 17, March 1990, p. 259-262.
Other
20
Ionospheric Disturbances, Lightning, Whistlers, Electron Precipitation, Electron Scattering, Radiation Belts, Southern Hemisphere, Very Low Frequencies
Scientific paper
Characteristic whistler-associated amplitude perturbations of subionospheric VLF or LF signals observed within one second of each other at Palmer Station, Antarctica and at Arecibo suggest that ionospheric regions in both Northern and Southern Hemispheres are disturbed together in association with individual lightning flashes. During a one hour period on March 21, 1989, the onsets of 44 out of 47 perturbations measured on a 21.4 kHz signal from Maryland to Arecibo occurred within 1 sec of perturbation onsets measured on a 23.4 kHz signal from Hawaii to Palmer Station. The observations are consistent with the disturbance of geomagnetically conjugate ionospheric regions by multiple bounces between hemispheres of bursts of radiation belt electrons, scattered in pitch angle by whistlers in the magnetosphere. The results suggest that there were at least two distinct ionospheric disturbances in each hemisphere.
Burgess W. C.
Inan Umran S.
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