Date of Award

2018

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Space Science

Committee Chair

Robert Preece

Committee Member

Michael S. Briggs

Committee Member

Valerie Connaughton

Committee Member

Eric Grove

Committee Member

Phillip Bitzer

Committee Member

Jacob Heerikhuisen

Subject(s)

Thunderstorms., Gamma ray bursts., Electron beams.

Abstract

Terrestrial Gamma-ray Flashes (TGFs) and Terrestrial Electron Beams (TEBs) make up an emerging field of study that unites the fields of atmospheric and space science. In this work, I investigate pairs of TGFs to find if their members are consistent with originating from the same thunderstorm cell. Ten pairs are found to have origins consistent form the same thunderstorm cell, which leads to a minimum electric field recharge time to be 10 s or less. TGFs with multiple pulses are analyzed in relation to their radio atmospheric signals (sferics). Previous work showed only an association with the last peak of multiple-pulsed TGFs, but we find that seven of the events have an association with either the first pulse or both pulses. This work leads to further implications to models of TGFs. Additionally, I search for TEB candidates in \textit{Fermi} Gamma-ray Burst Monitor (\textit{Fermi}-GBM) data. The search identifies six preponderance criteria and finds 30 possible TEBs. Lastly, a unique event, consisting of a TGF and TEB and observed by \textit{Fermi}-GBM, is analyzed. Using GRESS, I perform Monte Carlo simulations to compare with observations of both the TGF and TEB. The source relativistic electrons are independently calculated for each phenomenon and are found to be consistent from being produced by the same source.

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