Bastille Day Event: A Radio Perspective |
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| Authors: | Reiner MJ Kaiser ML Karlický M Jiřička K Bougeret J-L |
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| Institution: | (1) NASA/GSFC, Greenbelt, MD and Center for Solar Physics and Space Weather, The Catholic University of America, Washington, DC, U.S.A.;(2) NASA/GSFC, Laboratory for Extraterrestrial Physics, Greenbelt, MD, 20771, U.S.A;(3) Astronomical Institute of the Academy of Sciences of the, Czech Republic;(4) Observatoire de Paris, Meudon, France |
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| Abstract: | We describe the radio signatures that led up to and concluded the solar eruptive event of 14 July 2000 (Bastille Day Event).
These radio signatures provide a means of remotely sensing the associated solar activity and transient phenomena. For many
days prior to the Bastille Day Event kilometric Type III radio storm emissions were observed that were presumably associated
with the active region NOAA 9077. These storm emissions continued until the X5.7 flare at ∼ 10 UT on 14 July 2000 that characterized
the Bastille Day Event, then ceased abruptly. The Bastille Day Event itself produced very intense, complex, long-duration
Type III-like radio emissions, which appear to have been associated with electrons generated (accelerated) deep in the solar
corona. The coronal mass ejection (CME) associated with the Bastille Day Event generated decametric to kilometric Type II
radio emissions as the CME propagated through the solar corona and interplanetary medium. The frequency drift of these Type II
radio emissions are related to the dynamics of the propagating CME and indicate that the CME experienced significant deceleration
as it propagated from the high corona into the interplanetary medium. |
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