CEDAR email: AOGS Session ST20 Observations and Modelling of Geomagnetic Sudden Commencements: the Effects of Solar Wind Pressure Pulses

[Alexandra Ruth Fogg]

Dear Colleagues,

We warmly invite abstracts to our session at Asia Oceania Geosciences 
Society meeting 
(https://www.asiaoceania.org/aogs2024/public.asp?page=home.asp) in 
Pyeongchang, Gangwon-do (23rd-28th June 2024). Our session ST20 is 
entitled "/Observations and Modelling of Geomagnetic Sudden 
Commencements: the Effects of Solar Wind Pressure Pulses/". Abstracts 
are due for submission on 2nd January 2024.

Please see session abstract below:

/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).

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./

We look forward to seeing you in Gangwon-do!

Session conveners:

Dr Alexandra Fogg (Dublin Institute for Advanced Studies)
Dr Igino Coco (Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy)
Dr Andy Smith (Department of Mathematics, Physics and Electrical 
Engineering, Northumbria University, Newcastle upon Tyne, UK)

-- 
Dr. Alexandra Ruth Fogg (she/her)

IRC Government of Ireland Postdoctoral Fellow
School of Cosmic Physics - Astronomy & Astrophysics
Dublin Institute for Advanced Studies

https://orcid.org/0000-0002-1139-5920


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