First Simultaneous Observation of STEVE and SAR Arc Combining Data From Citizen Scientists, 630.0&nbsp;nm All‐Sky Images, and Satellites

Martinis, C.; Nishimura, Y.; Wroten, J.; Bhatt, A.; Dyer, A.; Baumgardner, J.; Gallardo‐Lacourt, B.

doi:10.1029/2020GL092169

First Simultaneous Observation of STEVE and SAR Arc Combining Data From Citizen Scientists, 630.0 nm All‐Sky Images, and Satellites

Journal Article · Sat Apr 24 00:00:00 EDT 2021 · Geophysical Research Letters

DOI:https://doi.org/10.1029/2020GL092169· OSTI ID:1786831

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Center for Space Physics Astronomy Department Boston University Boston MA USA
Department of Electrical and Computer Engineering Center for Space Physics Boston University Boston MA USA
Center for Geospace Studies SRI International Menlo Park CA USA
Citizen Scientist Alberta AB Canada
NASA Goddard Space Flight Center Greenbelt MD USA, Universities of Space Research Association Columbia MD USA

Abstract

On September 28, 2017 citizen scientist observations at Alberta, Canada (51°N, 113° W) detected aurora and a thin east‐west purplish arc, known as strong thermal emission velocity enhancement (STEVE) that lasted less than 20 min. All‐sky imagers at subauroral latitudes measured stable auroral red (SAR) arcs during the entire night. The imager at Bridger, MT (45.3°N, 108.9°W) also measured a STEVE. The overlapping geometry allowed to determine that the height of STEVE was 225–275 km. STEVE is brighter in the 630.0 nm images in the West and almost merges with the SAR arc in the East. A DMSP satellite pass in the southern hemisphere was at the conjugate location of the Bridger imager during the STEVE observation. When mapped into the northern hemisphere intense subauroral ion drift and subauroral polarization streams were detected associated with the two optical signatures measured in 630.0 nm.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

OSTI ID:: 1786831

Journal Information:: Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 8 Vol. 48; ISSN 0094-8276

Publisher:: American Geophysical Union (AGU)Copyright Statement

Country of Publication:: United States

Language:: English

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