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Ionospheric currents during geomagnetic storms and substorms

 

Project description

INGENIOUS is a consortium project between the university of Oulu and Finnish Meteorological Institute. It is funded by the Academy of Finland during 1.9.2018 - 31.8.2022

PI: Heikki Vanhamäki, UO

Co-PI: Ari Viljanen, FMI

 

Understanding the detailed spatial and temporal dynamics of the space environment is the key task in the basic solar-terrestrial research. This is inevitably related to the success in providing space weather forecasts to protect vulnerable technological systems. For example, power grids can be compromised by geomagnetically induced currents (GIC) that are created during large auroral storms. In this project we study the spatial and temporal variations of ionospheric current systems during major geomagnetic disturbances, such as storms and substorms. As currents are most easily detected by the magnetic fields they create, we use data from magnetometers onboard satellites at low Earth orbit as well as on the ground around the auroral oval. Our results will pave way to more accurate predictions of auroral activity and GICs.

 

Publications

Remember to include sentence "This work was supported by the Academy of Finland project 314664" in the acknowledgements of all publications related to the INGENIOUS project.

Cai L., S. Oyama, A. Aikio, H. Vanhamäki and I. Virtanen: "Fabry-Perot interferometer observations of thermospheric horizontal winds during magnetospheric substorms", J. Geophys. Res. Space, 124, doi: 10.1029/2018JA026241, 2019.

Dimmock, A.P., L. Rosenqvist, J.-O. Hall, A. Viljanen, E. Yordanova, I. Honkonen, M. André and E.C. Sjöberg: "The GIC and geomagnetic response over Fennoscandia to the 7‐8 September 2017 geomagnetic storm", Space Weather, 17, doi: 10.1029/2018SW002132, 2019.

Vanhamäki H. and L. Juusola: "Introduction to Spherical Elementary Current Systems", in review, chapter in book "Ionospheric Multi-Spacecraft Analysis Tools", 2018.

Vanhamäki H., L. Juusola, K. Kauristie, A. Workayehu and S. Käki: "Spherical Elementary Current Systems applied to Swarm data", in review, chapter in book "Ionospheric Multi-Spacecraft Analysis Tools", 2018.

Waters C.L., B.J. Anderson, D.L. Green, H. Korth, R.J. Barnes and H. Vanhamäki: "Science data products for AMPERE", in review, chapter in book "Ionospheric Multi-Spacecraft Analysis Tools", 2018.

Workayehy A., H. Vanhamäki, and A. Aikio: "Field-aligned and horizontal currents in the Northern and Southern hemispheres from the Swarm satellite", accepted for publication in Journal of Geophysical Research, 2019.

 

Presentations

Pedersen M.N., H. Vanhamäki, A. Aikio, A. Käki, A. Viljanen, and A. Workayehu: "Impact of Solar Wind High Speed Streams on Ionospheric Current Systems and Associated Space Weather Effects", poster presentation, 27th IUGG general assembly, Montreal, Canada, 8-18 July, 2019.

Vanhamäki H., S. Oyama, M. Conde, A. Aikio, L. Cai and I. Virtanen: "Estimating 2D neutral wind pattern using line-of-sight data from multiple Scanning Doppler Imagers", poster presentation, AGU fall meeting, Washington DC, 10-14 December 2018.

Vanhamäki H. "Using the SECS method to estimate ionospheric currents from Swarm magnetic data at middle and low latitudes", Oral presentation, X Observatory Days, Sodankylä Geophysical Observatory, Finland, 9-11 January 2019.

Vanhamäki H., A. Maute, P. Alken, and H. Liu: "Estimating Interhemispheric Field-Aligned and Sq-Currents and the Equatorial Electrojet with Swarm Satellite Data", oral presentation, 27th IUGG general assembly, Montreal, Canada, 8-18 July, 2019.

Workayehu A., H. Vanhamäki and A. Aikio: "Ionospheric currents in the two hemispheres during low and high magnetic activity by the Swarm satellite", poster presentation, AGU fall meeting, Washington DC, 10-14 December 2018.

Workayehu A., H. Vanhamäki, and A. Aikio: "Field-aligned and horizontal currents in the Northern and Southern hemispheres from the Swarm satellite", oral presentation, 27th IUGG general assembly, Montreal, Canada, 8-18 July, 2019.

 

 

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