Zobrazeno 1 - 10
of 30
pro vyhledávání: '"M. Ala‐Lahti"'
Publikováno v:
Annales Geophysicae, Vol 42, Pp 163-177 (2024)
In this work, we perform a statistical study of magnetic field fluctuations in the solar wind at 1 au using permutation entropy and complexity analysis and the investigation of the temporal variations of the Hurst exponents. Slow and fast wind, magne
Externí odkaz:
https://doaj.org/article/4a2dd2893caf47b4ad4ab16ebbd9a950
Autor:
M. Akhavan-Tafti, L. Johnson, R. Sood, J. A. Slavin, T. Pulkkinen, S. Lepri, E. Kilpua, D. Fontaine, A. Szabo, L. Wilson, G. Le, T. Y. Atilaw, M. Ala-Lahti, S. L. Soni, D. Biesecker, L. K. Jian, D. Lario
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 10 (2023)
The Space Weather Investigation Frontier (SWIFT) mission will aim at making major discoveries on the three-dimensional structure and dynamics of heliospheric structures that drive space weather. The focus will be on Interplanetary Coronal Mass Ejecti
Externí odkaz:
https://doaj.org/article/4091f28d72de4a488db4843c4e8d2c62
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
Sheath regions of interplanetary coronal mass ejections (ICMEs) are formed when the upstream solar wind is deflected and compressed due to the propagation and expansion of the ICME. Small-scale flux ropes found in the solar wind can thus be swept int
Externí odkaz:
https://doaj.org/article/1a656ff6b165488598917518c4e8c76e
Autor:
E. K. J. Kilpua, D. Fontaine, S. W. Good, M. Ala-Lahti, A. Osmane, E. Palmerio, E. Yordanova, C. Moissard, L. Z. Hadid, M. Janvier
Publikováno v:
Annales Geophysicae, Vol 38, Pp 999-1017 (2020)
In this work, we investigate magnetic field fluctuations in three coronal mass ejection (CME)-driven sheath regions at 1 AU, with their speeds ranging from slow to fast. The data set we use consists primarily of high-resolution (0.092 s) magnetic
Externí odkaz:
https://doaj.org/article/d924c28382cf47a0819eb633cedea544
Autor:
A. Lakka, T. I. Pulkkinen, A. P. Dimmock, E. Kilpua, M. Ala-Lahti, I. Honkonen, M. Palmroth, O. Raukunen
Publikováno v:
Annales Geophysicae, Vol 37, Pp 561-579 (2019)
We study the response of the Earth's magnetosphere to fluctuating solar wind conditions during interplanetary coronal mass ejections (ICMEs) using the Grand Unified Magnetosphere-Ionosphere Coupling Simulation (GUMICS-4). The two ICME events occurred
Externí odkaz:
https://doaj.org/article/a8493871fbf7408bbea8542cc57d143f
Autor:
E. K. J. Kilpua, S. W. Good, M. Ala-Lahti, A. Osmane, D. Fontaine, L. Hadid, M. Janvier, E. Yordanova
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 7 (2021)
We report a statistical analysis of magnetic field fluctuations in 79 coronal mass ejection- (CME-) driven sheath regions that were observed in the near-Earth solar wind. Wind high-resolution magnetic field data were used to investigate 2 h regions a
Externí odkaz:
https://doaj.org/article/56c9549cac3c43159904a6a9e0c7425f
Interplanetary coronal mass ejections (ICMEs) contain magnetic field and velocity fluctuations across a wide range of scales. These fluctuations may be interpreted as Alfv\'enic wave packets propagating parallel or anti-parallel to the background mag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7ed425b092823d4d113fe6abcf4c443
http://arxiv.org/abs/2205.07751
http://arxiv.org/abs/2205.07751
Akademický článek
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Akademický článek
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Autor:
M. Palmroth, J. Praks, R. Vainio, P. Janhunen, E. K. J. Kilpua, A. Afanasiev, M. Ala‐Lahti, A. Alho, T. Asikainen, E. Asvestari, M. Battarbee, A. Binios, A. Bosser, T. Brito, M. Dubart, J. Envall, U. Ganse, N. Yu. Ganushkina, H. George, J. Gieseler, S. Good, M. Grandin, S. Haslam, H.‐P. Hedman, H. Hietala, N. Jovanovic, S. Kakakhel, M. Kalliokoski, V. V. Kettunen, T. Koskela, E. Lumme, M. Meskanen, D. Morosan, M. Rizwan Mughal, P. Niemelä, S. Nyman, P. Oleynik, A. Osmane, E. Palmerio, J. Peltonen, Y. Pfau‐Kempf, J. Plosila, J. Polkko, S. Poluianov, J. Pomoell, D. Price, A. Punkkinen, R. Punkkinen, B. Riwanto, L. Salomaa, A. Slavinskis, T. Säntti, J. Tammi, H. Tenhunen, P. Toivanen, J. Tuominen, L. Turc, E. Valtonen, P. Virtanen, T. Westerlund
Publikováno v:
Journal of Geophysical Research: Space Physics
Today, the near-Earth space is facing a paradigm change as the number of new spacecraft is literally sky-rocketing. Increasing numbers of small satellites threaten the sustainable use of space, as without removal, space debris will eventually make ce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f6b27f9feab65747ed8ac8cf587c499
http://urn.fi/urn:nbn:fi-fe2019082825952
http://urn.fi/urn:nbn:fi-fe2019082825952