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Timo Pitkänen
Contact
E-mail
timo.pitkanen@umu.se
Phone
+46 90 786 50 49
Works as
Affiliation
Other position
at
Department of Physics
Location
Fysikhuset, plan 4, Linnaeus väg 24, -
Umeå universitet, 901 87 Umeå
Publications
Publications
Research
Research
2025
Ion moment variability across substorm phases: statistical insights
Journal of Geophysical Research - Space Physics
, American Geophysical Union (AGU) 2025, Vol. 130, (3)
Kumar, Sanjay; Pulkkinen, Tuija I.; Pitkänen, Timo
2025
IMF By influence on fast earthward convection flows in the near-lunar magnetotail
Geoscience Letters
, Springer Nature 2025, Vol. 12, (1)
Liu, T.C.; Pitkänen, Timo; Nilsson, S.; et al.
2025
Statistical observations in support of bow shock current closure to earth's high-latitude ionosphere during non-zero IMF B
y
Journal of Geophysical Research - Space Physics
, American Geophysical Union (AGU) 2025, Vol. 130, (6)
Nordin, Gabriella; Hamrin, Maria; Krämer, Eva; et al.
2024
Statistical features of polar cap North and South indices in response to interplanetary and terrestrial conditions: a revisit
Space Weather: The International Journal of Research and Application
, American Geophysical Union (AGU) 2024, Vol. 22, (4)
Park, Jong-Sun; Shi, Quan Qi; Troshichev, Oleg A.; et al.
2024
Importance of the dusk-dawn interplanetary magnetic field component (IMF B
y
) to magnetospheric convection in Earth's magnetotail plasma sheet
Frontiers in Astronomy and Space Sciences
, Frontiers Media S.A. 2024, Vol. 11
Pitkänen, Timo; Kullen, Anita; Chong, Ghai Siung
2024
Statistical analysis of whistler precursors upstream of foreshock transient shocks: MMS observations
Geophysical Research Letters
, American Geophysical Union (AGU) 2024, Vol. 51, (8)
Wang, Mengmeng; Liu, Terry Z.; Zhang, Hui; et al.
2023
Space weather disturbances in non-stormy times: occurrence of dB/dt spikes during three solar cycles
Journal of Geophysical Research - Space Physics
, American Geophysical Union (AGU) 2023, Vol. 128, (10)
Hamrin, Maria; Schillings, Audrey; Opgenoorth, Hermann J.; et al.
2023
Auroral electrojet activity for long-duration radial interplanetary magnetic field events
Journal of Geophysical Research - Space Physics
, American Geophysical Union (AGU) 2023, Vol. 128, (3)
Park, Jong-Sun; Shi, Quan Qi; Shue, Jih-Hong; et al.
2023
Statistical survey of magnetic forces associated with earthward bursty bulk flows measured by MMS 2017–2021
Journal of Geophysical Research - Space Physics
, American Geophysical Union (AGU) 2023, Vol. 128, (5)
Pitkänen, Timo; Chong, Ghai Siung; Hamrin, Maria; et al.
2023
Fast Earthward Convection in the Magnetotail and Nonzero IMF
B
y
: MMS Statistics
Journal of Geophysical Research - Space Physics
, American Geophysical Union (AGU) 2023, Vol. 128, (12)
Pitkänen, Timo; Chong, Ghai Siung; Hamrin, Maria; et al.
2023
Statistical properties of the distribution and generation of kinetic-scale flux ropes in the terrestrial dayside magnetosheath
Geophysical Research Letters
, American Geophysical Union (AGU) 2023, Vol. 50, (23)
Xiao, Y.C.; Yao, S.T.; Guo, R.L.; et al.
2023
Ion-Vortex Magnetic Hole With Reversed Field Direction in Earth's Magnetosheath
Journal of Geophysical Research - Space Physics
, John Wiley & Sons 2023, Vol. 128, (7)
Yao, S.T.; Li, J.H.; Zhou, X.-Z.; et al.
2022
Dawn-Dusk Ion Flow Asymmetry in the Plasma Sheet: Interplanetary Magnetic Field By Versus Distance With Respect to the Neutral Sheet
Journal of Geophysical Research - Space Physics
, John Wiley & Sons 2022, Vol. 127, (4)
Chong, Ghai Siung; Pitkänen, Timo; Hamrin, Maria; et al.
2022
Radial Interplanetary Magnetic Field-Induced North-South Asymmetry in the Solar Wind-Magnetosphere-Ionosphere Coupling: A Case Study
Journal of Geophysical Research - Space Physics
, John Wiley & Sons 2022, Vol. 127, (2)
Park, Jong-Sun; Shi, Quan Qi; Shi, Xueling; et al.
2022
Structure of Pc 5 Compressional Waves Observed in the Duskside Outer Magnetosphere: MMS Observations
Journal of Geophysical Research - Space Physics
, John Wiley & Sons 2022, Vol. 127, (3)
Tian, Anmin; Degeling, Alexander W.; Park, Jong-Sun; et al.
2021
Tailward Flows in the Vicinity of Fast Earthward Flows
Journal of Geophysical Research - Space Physics
, Blackwell Publishing 2021, Vol. 126, (4)
Chong, Ghai Siung; De Spiegeleer, Alexandre; Hamrin, Maria; et al.
2021
Ion Convection as a Function of Distance to the Neutral Sheet in Earth's Magnetotail
Journal of Geophysical Research - Space Physics
, John Wiley & Sons 2021, Vol. 126, (12)
Chong, Ghai Siung; Pitkänen, Timo; Hamrin, Maria; et al.
2021
In Which Magnetotail Hemisphere is a Satellite? Problems Using in Situ Magnetic Field Data
Journal of Geophysical Research - Space Physics
, Blackwell Publishing 2021, Vol. 126, (2)
De Spiegeleer, Alexandre; Hamrin, Maria; Gunell, Herbert; et al.
2021
Ground-Based Magnetometer Response to Impacting Magnetosheath Jets
Journal of Geophysical Research - Space Physics
, John Wiley & Sons 2021, Vol. 126, (8)
Norenius, Linus; Hamrin, Maria; Goncharov, O.; et al.
2021
Transpolar Arcs During a Prolonged Radial Interplanetary Magnetic Field Interval
Journal of Geophysical Research - Space Physics
, John Wiley & Sons 2021, Vol. 126, (6)
Park, Jong-Sun; Shi, Quan Qi; Nowada, Motoharu; et al.
2021
Relevance of the North-South Electric Field Component in the Propagation of Fast Convective Earthward Flows in the Magnetotail: An Event Study
Journal of Geophysical Research - Space Physics
, American Geophysical Union (AGU) 2021, Vol. 126, (7)
Pitkänen, Timo; Hamrin, Maria; Chong, Ghai Siung; et al.
2021
Asymmetry in the Earth's magnetotail neutral sheet rotation due to IMF
B
y
sign?
Geoscience Letters
, Springer 2021, Vol. 8, (1)
Pitkänen, Timo; Kullen, Anita; Cai, Lei; et al.
2020
Reconstruction of Plasma Structure with Anisotropic Pressure: Application to Pc5 Compressional Wave
Astrophysical Journal
, Institute of Physics Publishing (IOPP) 2020, Vol. 889, (1)
Tian, Anmin; Xiao, Kai; Degeling, Alexander William; et al.
2019
Oscillatory Flows in the Magnetotail Plasma Sheet: Cluster Observations of the Distribution Function
Journal of Geophysical Research - Space Physics
, AMER GEOPHYSICAL UNION 2019, Vol. 124, (4) : 2736-2754
De Spiegeleer, Alexandre; Hamrin, Maria; Gunell, Herbert; et al.
2019
Oxygen Ion Flow Reversals in Earth's Magnetotail: A Cluster Statistical Study
Journal of Geophysical Research - Space Physics
, Wiley-Blackwell 2019, Vol. 124, (11) : 8928-8942
De Spiegeleer, Alexandre; Hamrin, Maria; Volwerk, M.; et al.
2019
Can Reconnection be Triggered as a Solar Wind Directional Discontinuity Crosses the Bow Shock?: A Case of Asymmetric Reconnection
Journal of Geophysical Research - Space Physics
, American Geophysical Union (AGU) 2019, Vol. 124, (11) : 8507-8523
Hamrin, Maria; Gunell, Herbert; Goncharov, Oleksandr; et al.
2019
IMF B-y Influence on Magnetospheric Convection in Earth's Magnetotail Plasma Sheet
Geophysical Research Letters
, American Geophysical Union (AGU) 2019, Vol. 46, (21) : 11698-11708
Pitkänen, Timo; Kullen, A.; Laundal, K. M.; et al.
2018
Energy conversion in cometary atmospheres: Hybrid modeling of 67P/Churyumov-Gerasimenko
Astronomy and Astrophysics
, EDP Sciences 2018, Vol. 616
Lindkvist, Jesper; Hamrin, Maria; Gunell, Herbert; et al.
2018
Convection electric field and plasma convection in a twisted magnetotail: t THEMIS case study 1-2 January 2009
Journal of Geophysical Research - Space Physics
, American Geophysical Union (AGU) 2018, Vol. 123, (9) : 7486-7497
Pitkänen, Timo; Kullen, A.; Shi, Q. Q.; et al.
2017
Low-frequency oscillatory flow signatures and high-speed flows in the Earth's magnetotail
Journal of Geophysical Research - Space Physics
, Washington: American Geophysical Union (AGU) 2017, Vol. 122, (7) : 7042-7056
De Spiegeleer, Alexandre; Hamrin, Maria; Pitkänen, Timo; et al.
2017
The Delayed Time Response of Geomagnetic Activity to the Solar Wind
Journal of Geophysical Research - Space Physics
, AMER GEOPHYSICAL UNION 2017, Vol. 122, (11) : 109-127
Maggiolo, R.; Hamrin, Maria; De Keyser, J.; et al.
2017
On IMF
B
y
-induced dawn-dusk asymmetries in earthward convective fast flows
Dawn-dusk asymmetries in planetary plasma environments
, American Geophysical Union (AGU) 2017 : 95-106
Pitkänen, Timo; Hamrin, Maria; Karlsson, Tomas; et al.
2017
Detection of EMPs generated by meteoroid impacts on the MMS spacecraft and problems with signal interpretation
2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)
Vaverka, Jakub; Pellinen-Wannberg, Asta; Kero, Johan; et al.
2017
Potential of Earth Orbiting Spacecraft Influenced by Meteoroid Hypervelocity Impacts
IEEE Transactions on Plasma Science
, Vol. 45, (8) : 2048-2055
Vaverka, Jakub; Pellinen-Wannberg, Asta; Kero, Johan; et al.
2017
Detection of meteoroid hypervelocity impacts on the Cluster spacecraft: First results
Journal of Geophysical Research - Space Physics
, Vol. 122, (6) : 6485-6494
Vaverka, Jakub; Pellinen-Wannberg, Asta; Kero, Johan; et al.
2017
Observations of kinetic-size magnetic holes in the magnetosheath
Journal of Geophysical Research - Space Physics
, AMER GEOPHYSICAL UNION 2017, Vol. 122, (2) : 1990-2000
Yao, Shutao; Wang, X. G.; Shi, Q. Q.; et al.
2016
Oxygen ion response to proton bursty bulk flows
Journal of Geophysical Research - Space Physics
, Vol. 121, (8) : 7535-7546
Nilsson, Hans; Hamrin, Maria; Pitkänen, Timo; et al.
2016
Response of magnetotail twisting to variations in IMF B-y: a THEMIS case study 1-2 January 2009
Geophysical Research Letters
, Wiley-Blackwell 2016, Vol. 43, (15) : 7822-7830
Pitkänen, Timo; Hamrin, Maria; Kullen, A.; et al.
2016
Spacecraft potential influenced by meteoroid hypervelocity impacts
IEEE Transactions on Plasma Science
Vaverka, Jakub; Pellinen-Wannberg, Asta; Kero, Johan; et al.
2016
Propagation of small size magnetic holes in the magnetospheric plasma sheet
Journal of Geophysical Research - Space Physics
, Wiley-Blackwell 2016, Vol. 121, (6) : 5510-5519
Yao, S. T.; Shi, Q. Q.; Li, Z. Y.; et al.
2015
The use of the power density for identifying reconnection regions
Journal of Geophysical Research - Space Physics
, Vol. 120, (10) : 8644-8662
Hamrin, Maria; Andersson, L.; Vaivads, A.; et al.
2015
Magnetic forces associated with bursty bulk flows in Earth's magnetotail
Geophysical Research Letters
, Vol. 42, (9) : 3122-3128
Karlsson, Tomas; Hamrin, Maria; Nilsson, Hans; et al.
2015
Azimuthal velocity shear within an Earthward fast flow: further evidence for magnetotail untwisting?
Annales Geophysicae
, Vol. 33 : 245-255
Pitkänen, Timo; Hamrin, Maria; Norqvist, Patrik; et al.
2014
Evidence for the braking of flow bursts as they propagate toward the Earth
Journal of Geophysical Research - Space Physics
, Vol. 119, (11) : 9004-9018
Hamrin, Maria; Pitkänen, Timo; Norqvist, Patrik; et al.
2013
IMF effect on the polar cap contraction and expansion during a period of substorms
Annales Geophysicae
, Vol. 31 : 1021-1034
Aikio, Anita T.; Pitkänen, Timo; Honkonen, Ilja; et al.
2013
A reexamination of latitudinal limits of substorm-produced energetic electron precipitation
Journal of Geophysical Research - Space Physics
, Vol. 118 : 6694-6705
Cresswell-Moorcock, Kathy; Rodger, Craig J.; Kero, Antti; et al.
2013
The evolution of flux pileup regions in the plasma sheet: Cluster observations
Journal of Geophysical Research - Space Physics
, American Geophysical Union (AGU) 2013, Vol. 118, (10) : 6279-6290
Hamrin, Maria; Norqvist, Patrik; Karlsson, T.; et al.
2013
Ionospheric signatures of a plasma sheet rebound flow during a substorm onset
Journal of Geophysical Research - Space Physics
, Vol. 118 : 350-363
Juusola, Liisa; Kubyshkina, Marina; Nakamura, Rumi; et al.
2013
Observations of polar cap flow channel and plasma sheet flow bursts during substorm expansion
Journal of Geophysical Research - Space Physics
, Vol. 118 : 774-784
Pitkänen, Timo; Aikio, Anita T.; Juusola, Liisa
2013
IMF dependence of the azimuthal direction of earthward magnetotail fast flows
Geophysical Research Letters
, American Geophysical Union (AGU) 2013, Vol. 40, (21) : 5598-5604
Pitkänen, Timo; Hamrin, Maria; Norqvist, Patrik; et al.
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Solar-terrestrial physics and space weather
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