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<p>Dear Colleagues,<br>
</p>
<p>We warmly invite abstracts to our session at Asia Oceania
Geosciences Society meeting (<a
href="https://www.asiaoceania.org/aogs2024/public.asp?page=home.asp"
target="_blank" class="moz-txt-link-freetext">https://www.asiaoceania.org/aogs2024/public.asp?page=home.asp</a>)
in Pyeongchang, Gangwon-do (23rd-28th June 2024). Our session ST20
is entitled "<i>Observations and Modelling of Geomagnetic Sudden
Commencements: the Effects of Solar Wind Pressure Pulses</i>".
Abstracts are due for submission on 2nd January 2024. <br>
</p>
<p>Please see session abstract below:</p>
<p><i>Pockets of solar wind plasma that are faster and/or denser
than the surrounding ambient plasma are known as solar wind
pressure pulses. When these pressure pulses impact the
terrestrial magnetopause, they rapidly compress the
magnetosphere and excite the electrodynamics within. As the
effects propagate inwards a well observed enhancement in the
horizontal ground magnetic field occurs; this communication of
pressure pulse effects into the magnetosphere is known as a
geomagnetic sudden commencement (SC). SCs can be further
subdivided into sudden impulses (SIs) and sudden storm
commencements (SSCs), where in the latter case, the pressure
pulse is followed by a geomagnetic storm. Even for small
enhancements in solar wind dynamic pressure, the internal
magnetospheric effects can be dramatic. Among these effects,
observations and modelling suggest: enhancements and
restructuring of high latitude ionospheric currents and
convection; auroral emission excited by particle precipitation;
energisation of the plasmasphere; excitation of magnetospheric
current systems; enhanced ULF wave activity; space weather
effects such as geomagnetically-induced currents (GICs).<br>
<br>
In this session we warmly invite contributions based on either
observations or modelling of the effects of geomagnetic sudden
commencements on the coupled solar wind – magnetosphere –
ionosphere system. Papers may present results on phenomena
including (but not limited to): ULF wave propagation;
ionospheric convection; ionospheric and magnetospheric current
systems; auroral emission; terrestrial radio emissions;
plasmasphere effects; GIC effects. We seek to facilitate
cross-over discussion between the observational and modelling
communities, and provide fertile ground for future collaborative
work in the community.</i><br>
</p>
<p>We look forward to seeing you in Gangwon-do!</p>
<p>Session conveners: </p>
Dr Alexandra Fogg (Dublin Institute for Advanced Studies)<br>
Dr Igino Coco (Istituto Nazionale di Geofisica e Vulcanologia, Rome,
Italy)<br>
Dr Andy Smith (Department of Mathematics, Physics and Electrical
Engineering, Northumbria University, Newcastle upon Tyne, UK)
<p></p>
<pre class="moz-signature" cols="72">--
Dr. Alexandra Ruth Fogg (she/her)
IRC Government of Ireland Postdoctoral Fellow
School of Cosmic Physics - Astronomy & Astrophysics
Dublin Institute for Advanced Studies
<a class="moz-txt-link-freetext" href="https://orcid.org/0000-0002-1139-5920">https://orcid.org/0000-0002-1139-5920</a></pre>
<br>
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