Statistical comparison of electron precipitation during auroral breakups occurring either near the open–closed field line boundary or in the central part of the auroral oval
Grandin, Maxime, Partamies, Noora, Virtanen, Ilkka I.
Published in Annales geophysicae (1988) (06.09.2024)
Published in Annales geophysicae (1988) (06.09.2024)
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Journal Article
Reconstructing solar magnetic fields from historical observations
Virtanen, I. O. I., Virtanen, I. I., Pevtsov, A. A., Yeates, A., Mursula, K.
Published in Astronomy and astrophysics (Berlin) (01.08.2017)
Published in Astronomy and astrophysics (Berlin) (01.08.2017)
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Journal Article
IMF Dependence of Midnight Bifurcation in the Thermospheric Wind at an Auroral Latitude Based on Nine Winter Measurements in Tromsø, Norway
Oyama, S., Hosokawa, K., Vanhamäki, H., Aikio, A., Sakanoi, T., Cai, L., Virtanen, I. I., Shiokawa, K., Nishitani, N., Shinbori, A., Ogawa, Y.
Published in Geophysical research letters (28.07.2023)
Published in Geophysical research letters (28.07.2023)
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Journal Article
Reconstructing solar magnetic fields from historical observations: III. Activity in one hemisphere is sufficient to cause polar field reversals in both hemispheres
Virtanen, I. O. I., Virtanen, I. I., Pevtsov, A. A., Mursula, K.
Published in Astronomy and astrophysics (Berlin) (01.08.2018)
Published in Astronomy and astrophysics (Berlin) (01.08.2018)
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Journal Article
Reconstructing solar magnetic fields from historical observations
Virtanen, I. O. I., Virtanen, I. I., Pevtsov, A. A., Mursula, K.
Published in Astronomy and astrophysics (Berlin) (01.12.2019)
Published in Astronomy and astrophysics (Berlin) (01.12.2019)
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Journal Article
Spatial–temporal evolution of photospheric weak-field shifts in solar cycles 21–24
Mursula, K., Getachew, T., Virtanen, I. I.
Published in Astronomy and astrophysics (Berlin) (01.01.2021)
Published in Astronomy and astrophysics (Berlin) (01.01.2021)
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Journal Article
Asymmetry of solar polar fields and the southward shift of HCS observed by Ulysses
Virtanen, I. I., Mursula, K.
Published in Journal of Geophysical Research: Space Physics (01.09.2010)
Published in Journal of Geophysical Research: Space Physics (01.09.2010)
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Journal Article
Reconstructing solar magnetic fields from historical observations
Virtanen, I. O. I., Virtanen, I. I., Pevtsov, A. A., Mursula, K.
Published in Astronomy and astrophysics (Berlin) (01.08.2018)
Published in Astronomy and astrophysics (Berlin) (01.08.2018)
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Journal Article
Reconstructing solar magnetic fields from historical observations
Virtanen, I O I, Pevtsov, A A, Virtanen, I I, Mursula, K
Published in Astronomy and astrophysics (Berlin) (01.08.2021)
Published in Astronomy and astrophysics (Berlin) (01.08.2021)
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Journal Article
EISCAT Observations of Depleted High‐Latitude F‐Region During an HSS/SIR‐Driven Magnetic Storm
Ellahouny, N. M., Aikio, A. T., Vanhamäki, H., Virtanen, I. I., Cai, L., Marchaudon, A., Blelly, P.‐L., Coster, A., Norberg, J., Maute, A., Oyama, S.‐I.
Published in Journal of geophysical research. Space physics (01.09.2024)
Published in Journal of geophysical research. Space physics (01.09.2024)
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Journal Article
Hierarchical deconvolution for incoherent scatter radar data
Ross, Snizhana, Arjas, Arttu, Virtanen, Ilkka I, Sillanpää, Mikko J, Roininen, Lassi, Hauptmann, Andreas
Published in Atmospheric measurement techniques (28.06.2022)
Published in Atmospheric measurement techniques (28.06.2022)
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Journal Article
Volumetric Reconstruction of Ionospheric Electric Currents From Tri‐Static Incoherent Scatter Radar Measurements
Reistad, J. P., Hatch, S. M., Laundal, K. M., Oksavik, K., Zettergren, M., Vanhamäki, H., Virtanen, I.
Published in Journal of geophysical research. Space physics (01.08.2024)
Published in Journal of geophysical research. Space physics (01.08.2024)
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Journal Article