EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Three-dimensional Hybrid-Vlasov Simulations of Geomagnetic Storms

Konstantinos Horaites, Markku Alho, Markus Battarbee, Maxime Dubart, Urs Ganse, Harriet George, Maxime Grandin, Talgat Manglayev, Minna Palmroth, Konstantinos Papadakis, Jonas Suni, Vertti Tarvus, Lucile Turc, Ivan Zaitsev, and Hongyang Zhou
Konstantinos Horaites et al.
  • University of Helsinki, Physics, Helsinki, Finland (

Vlasiator ( is a high-performance kinetic code that is now conducting the first ever 3D hybrid-Vlasov simulations of the global magnetospheric system. In recent months, the driving conditions of these simulations have been scaled up to emulate intense space weather events. Specifically, we have investigated the impact of a pressure pulse with southward-oriented Bz on the Earth's magnetosphere. Our simulations reproduce many known effects, for example the expansion of the auroral oval, compression of the magnetopause, the development of field-aligned currents, and enhanced particle precipitation near the open/closed field line boundary. We compare our data with spacecraft observations of real events that exhibit similar parameters to those imposed in the simulation. Our analysis shows that the hybrid-Vlasov approach captures many of the important aspects of the magnetospheric response to an incoming pressure pulse. With sufficient validation of our simulations by comparison with moderate storms, we aim to show that Vlasiator can be used as a tool to study even the most extreme events and their potential impacts on Earth's critical infrastructure.

How to cite: Horaites, K., Alho, M., Battarbee, M., Dubart, M., Ganse, U., George, H., Grandin, M., Manglayev, T., Palmroth, M., Papadakis, K., Suni, J., Tarvus, V., Turc, L., Zaitsev, I., and Zhou, H.: Three-dimensional Hybrid-Vlasov Simulations of Geomagnetic Storms, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-4687,, 2022.

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