Lauri Holappa
Lauri Holappa
Verified email at oulu.fi - Homepage
Title
Cited by
Cited by
Year
Correct normalization of the Dst index
K Mursula, L Holappa, A Karinen
Astrophysics and Space Sciences Transactions 4 (2), 41-45, 2008
322008
Annual fractions of high‐speed streams from principal component analysis of local geomagnetic activity
L Holappa, K Mursula, T Asikainen, IG Richardson
Journal of Geophysical Research: Space Physics 119 (6), 4544-4555, 2014
312014
Occurrence of high-speed solar wind streams over the Grand Modern Maximum
K Mursula, R Lukianova, L Holappa
The Astrophysical Journal, 2015
302015
Ring current development during high speed streams
VK Jordanova, H Matsui, PA Puhl-Quinn, MF Thomsen, K Mursula, ...
Journal of atmospheric and solar-terrestrial physics 71 (10-11), 1093-1102, 2009
282009
A new method to estimate annual solar wind parameters and contributions of different solar wind structures to geomagnetic activity
L Holappa, K Mursula, T Asikainen
Journal of Geophysical Research: Space Physics 119 (12), 9407-9418, 2014
242014
Seasonal solar wind speeds for the last 100 years: Unique coronal hole structures during the peak and demise of the Grand Modern Maximum
K Mursula, L Holappa, R Lukianova
Geophysical Research Letters 44 (1), 30-36, 2017
132017
Average properties of geomagnetic storms in 1932–2009
OS Yakovchouk, K Mursula, L Holappa, IS Veselovsky, A Karinen
Journal of Geophysical Research: Space Physics 117 (A3), 2012
122012
Uneven weighting of stations in the Dst index
K Mursula, L Holappa, A Karinen
Journal of atmospheric and solar-terrestrial physics 73 (2-3), 316-322, 2011
112011
Explicit IMF By Dependence in High‐Latitude Geomagnetic Activity
L Holappa, K Mursula
Journal of Geophysical Research: Space Physics 123 (6), 4728-4740, 2018
82018
Centennial evolution of monthly solar wind speeds: Fastest monthly solar wind speeds from long‐duration coronal holes
R Lukianova, L Holappa, K Mursula
Journal of Geophysical Research: Space Physics 122 (3), 2740-2747, 2017
52017
Explicit IMF By‐Effect Maximizes at Subauroral Latitudes (Dedicated to the Memory of Eigil Friis‐Christensen)
L Holappa, N Gopalswamy, K Mursula
Journal of Geophysical Research: Space Physics 124 (4), 2854-2863, 2019
22019
Toward more reliable long‐term indices of geomagnetic activity: Correcting a new inhomogeneity problem in early geomagnetic data
L Holappa, K Mursula
Journal of Geophysical Research: Space Physics 120 (10), 8288-8297, 2015
22015
Explicit IMF Dependence in Geomagnetic Activity: Modulation of Precipitating Electrons
L Holappa, T Asikainen, K Mursula
Geophysical Research Letters 47 (4), e2019GL086676, 2020
2020
Explicit IMF By-dependence in geomagnetic activity.
L Holappa, K Mursula
Geophysical Research Abstracts 21, 2019
2019
The story of the Grand Modern Maximum: Evolution of solar magnetic fields during the 20th century
K Mursula, L Holappa
42nd COSPAR Scientific Assembly 42, D2. 4-14-18, 2018
2018
The story of the Grand Modern Maximum: How did the solar magnetic field evolve during the 20th century?
K Mursula, L Holappa, R Lukianova
EGU General Assembly Conference Abstracts, 16501, 2018
2018
Relative Contributions of Coronal Mass Ejections and High-speed Streams to the Long-term Variation of Annual Geomagnetic Activity: Solar Cycle Variation and Latitudinal Differences
L Holappa, K Mursula
AGU Fall Meeting Abstracts 2017, SH53A-2553, 2017
2017
Principal component analysis of geomagnetic activity: New information on solar wind
K Mursula, L Holappa
Proceedings of the International Astronomical Union 13 (S335), 197-200, 2017
2017
A new method to estimate contributions of coronal mass ejections and high-speed streams to geomagnetic activity
L Holappa, K Mursula, T Asikainen
AGU Fall Meeting Abstracts 2016, GP31C-1321, 2016
2016
Towards more reliable long-term indices of geomagnetic activity: correcting a new inhomogeneity problem in early geomagnetic data
L Holappa, K Mursula
41st COSPAR Scientific Assembly 41, D2. 5-38-16, 2016
2016
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