Limb Flares, CMEs & Metric Type II Radio Bursts: A New Statistical Study

Details Limb Flares, CMEs & Metric Type II Radio Bursts: A New Statistical Study Limb Flares, CMEs & Metric Type II Radio Bursts: A New Statistical Study

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsh42a0767h&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SH42A-0767

Physics

7513 Coronal Mass Ejections, 7519 Flares, 7534 Radio Emissions

Scientific paper

Past studies of the relationship between flares, coronal mass ejections(CMEs), and metric typeII radio bursts have been accomplished without the significantly larger and more detailed CME database that is available today through SOHO/LASCO observations. This abundance of CME data allows us to more accurately study the flare-CME-typeII relationship thereby permitting better substantiated conclusions. Our study examines the relationship between solar flares and their correlated CMEs and metric typeII bursts by sampling all (approximately 900) X-ray/H-alpha limb flares occurring between January 1996 and June 2001. Flare events are collected from Solar Geophysical Data (SGD) and flare location is confirmed with SOHO EIT, Yokhoh SXT, and Nobeyama Radioheliograph movies. All correlated CMEs are confirmed in LASCO/EIT movies and their parameters are obtained from the CSPSW/NRL maintained, SOHO/LASCO CME catalog. Metric typeII burst data are also obtained from SGD and from the websites of several individual observatories (Potsdam, Hiraiso, Learmonth, Izmiran, and Nancay). We will present statistical analysis on the occurrences between all three solar phenomena and how these relationships change when flare, CME, and typeII parameters change. Additionally, we will analyze how the data relates to past results (e.g. CME Speed vs. Flare Intensity, CME Speed vs. TypeII Occurrence, TypeII Onset - Flare Start vs. Starting Frequency, etc.). We will also present relationships between CME-flare-typeII onset times in addition to solar cycle effects.

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