Substorm Activity as a Driver of Energetic Pulsating Aurora

Troyer, Riley; Jaynes, Allison; Kaeppler, S. R.; Varney, R. H.; Reimer, A. S.; Jones, S.

doi:10.1002/essoar.10510893.3

Cited by 2 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This data was captured over 51 days with the Poker Flat Research Range All Sky Imager (PFRR ASI). A table with the dates of all 51 days can be found in the supplemental material and the data can be found in Troyer et al (2022). The PFRR ASI takes an image approximately every 12 s at 428 nm, 557 nm, and 630 nm.…”

Section: Datamentioning

confidence: 99%

Substorm activity as a driver of energetic pulsating aurora

Troyer

Jaynes²,

Kaeppler³

et al. 2022

Front. Astron. Space Sci.

View full text Add to dashboard Cite

Pulsating aurora are common diffuse-like aurora. Studies have suggested that they contain higher energy particles than other types and are possibly linked to substorm activity. There has yet to be a quantitative statistical study of the variation in pulsating aurora energy content related to substorms. We analyzed the inverted energy content from 53 events using the Poker Flat Incoherent Scatter Radar. To reduce the uncertainty, we split the differential energy flux into low and high energy using the limit of 30 keV. We also analyzed the lower altitude boundary of the electron density profile, characterized by a number density of >1010 m−3, and used this as a proxy for high energy. We compared both of these to magnetic local time (MLT), AE index, and temporal proximity to substorm onset. There was a slight trend in MLT, but a much stronger one in relation to both substorm onset and AE index. For higher AE and closer to onset the total energy flux and flux above 30 keV increased. In addition, this higher energy remained enhanced for an hour after substorm onset. Our results confirm the high energy nature of pulsating aurora, demonstrate the connection to substorms, and imply their importance to coupling between the magnetosphere and atmosphere.

show abstract

Section: Datamentioning

confidence: 99%

Substorm activity as a driver of energetic pulsating aurora

Troyer

Jaynes²,

Kaeppler³

et al. 2022

Front. Astron. Space Sci.

View full text Add to dashboard Cite

show abstract

“…For instance, both LBC and pulsating aurora occur most frequently and with the strongest intensity between 3 and 6 MLT (Oguti, Kokubun, Hayashi, et al, 1981;Jones, Lessard, Rychert, et al, 2011;Meredith, Horne, Shen, et al, 2020). Additionally, pulsating aurora frequently have significant energy contributions from 10s to 100s of keV electrons, which, as we showed in Chapter 1.7.4, is the resonant energy range for lower-band chorus R. N. Troyer, Jaynes, Kaeppler, et al, 2022).…”

Section: Introductionmentioning

confidence: 56%

“…There also is a relation between greater energy flux and closer temporal proximity to the substorm (Hosokawa & Ogawa, 2015;Oyama, Kero, Rodger, et al, 2017;R. N. Troyer, Jaynes, Kaeppler, et al, 2022).…”

Section: Introductionmentioning

confidence: 99%