CEDAR email: [Announcement ISWI Seminar] From Discovery to Insight: Understanding STEVE and Its Relevance to Space Weather

[Maria Graciela Molina]

Dear colleagues,

We are pleased to announce the next ISWI Webinar of 2025 by *Dr. Bea
Gallardo-Lacourt * scheduled for* July 30th, 2025 at 3 PM Central European
Time (9 AM EDT; 7:30 PM IST*).
To watch past Webinars, please check the following link:
 https://cdaw.gsfc.nasa.gov/webinars/ISWI/
<https://cdaw.gsfc.nasa.gov/webinars/ISWI/>
Remember to register for the virtual seminar by sending an email to:
iswisupport at bc.edu. Please include “ISWI Seminar Registration” in the
subject line. There is a limit of 300 participants, so please register your
interest as soon as possible. The MS Teams link will be sent to registered
participants 2 days before the event.

With kind regards,

Graciela Molina
on behalf of the ISWI Seminar Committee
https://iswi-secretariat.org/home-page/organization/iswi-webinar-committee/

***********************************************
*Title:* From Discovery to Insight: Understanding STEVE and Its Relevance
to Space Weather
Speaker: Dr. Bea Gallardo-Lacourt
NASA/GSFC

*Abstract:*
The aurora is among the most captivating and scientifically rich natural
phenomena observed in the night sky, typically occurring in the polar
regions within a zone known as the auroral oval. This region hosts a range
of visually striking and physically complex structures. Just equatorward of
this lies the subauroral region—an area historically considered less
visually dynamic but nonetheless critical to
magnetosphere-ionosphere-thermosphere coupling. This view was upended by
the discovery of a striking optical phenomenon: STEVE (Strong Thermal
Emission Velocity Enhancement). Characterized by a narrow, purplish-white
arc extending across the sky, STEVE is not a traditional aurora and
originates in the subauroral ionosphere.
First brought to scientific attention through observations by citizen
scientists, STEVE has rapidly become a focal point of interest for both the
public and the research community. Its occurrence highlights previously
underexplored subauroral processes and raises new questions about energy
transfer and particle dynamics in near-Earth space.
This seminar will explore what we currently know about STEVE, review recent
multi-instrument findings—including those from ground-based imagers,
satellites, and citizen scientist reports—and identify key open questions.
We will also examine the potential space weather implications of STEVE,
particularly as they relate to ionospheric dynamics, subauroral electric
fields, and the broader coupling between the magnetosphere and ionosphere.

[image: ISWI Seminar Series (4).png]
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*Dra. María Graciela Molina*
Prof. Asociada FACET-UNT / Associate Professor FACET -UNT
Inv. Adjunta CONICET / Researcher CONICET
Investigadora Asociada INGV/ Associated researcher INGV
President of ALAGE (https://alage.org/)

Av. Independencia 1800, Tucumán - Argentina
Tel: +54-381-4364093 (ext.7765)
gmolina at herrera.unt.edu.ar /
*m.graciela.molina at gmail.com* <m.graciela.molina at gmail.com>
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