Timo Pitkänen

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timo.pitkanen@umu.se

090-786 50 49

Verksam vid

Anknuten som övrig/annan befattning till Institutionen för fysik

Fysikhuset, plan 4, Linnaeus väg 24, - Umeå universitet, 901 87 Umeå

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Asymmetry in the Earth's magnetotail neutral sheet rotation due to IMF B_ysign?

Geoscience Letters, Springer 2021, Vol. 8, (1)

Pitkänen, Timo; Kullen, Anita; Cai, Lei; et al.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Spacecraft potential influenced by meteoroid hypervelocity impacts

IEEE Transactions on Plasma Science

Vaverka, Jakub; Pellinen-Wannberg, Asta; Kero, Johan; et al.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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

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.

EISCAT-Cluster observations of quiet-time near-Earth magnetotail fast flows and their signatures in the ionosphere

Annales Geophysicae, Vol. 29 : 299-319

Pitkänen, Timo; Aikio, Anita T.; Amm, Olaf; et al.

Comparison of the open-closed field line boundary location inferred using IMAGE-FUV SI12 images and EISCAT radar observations

Annales Geophysicae, Copernicus Publications 2010, Vol. 28 : 883-892

Hubert, Benoit; Aikio, Anita T.; Amm, Olaf; et al.

Comparison of the open-closed field line boundary location inferred using IMAGE-FUV SI12 images and EISCAT radar observations

Annales Geophysicae, Vol. 28 : 883-892

Hubert, Benoit; Aikio, Anita T.; Amm, Olaf; et al.

Conjugate EISCAT-Cluster observations of quiet-time near-Earth magnetotail fast flows and their signatures in the ionosphere

URSI Finnish XXXII Convention on Radio Science and Electromagnetism 2010 meeting, Oulu, Finland, 26 August 2010

Pitkänen, Timo; Aikio, Anita T.; Amm, Olaf; et al.

Nordic ionospheric sounding rocket seeding experiment (NISSE)

Proc. 19th ESA Symposium on European Rocket and Balloon Programmes and Related Research, Bad Reichenhall, Germany, 7-11 June 2009 : 467-472

Hølland, Vidar; Pitkänen, Timo; Baumann, Gisela; et al.

Nordic ionospheric sounding rocket seeding experiment (NISSE)

Proc. 19th ESA Symposium on European Rocket and Balloon Programmes and Related Research, Bad Reichenhall, Germany, 7-11 June 2009 : 467-472

Hølland, Vidar; Pitkänen, Timo; Baumann, Gisela; et al.

Reconnection electric field estimates and dynamics of high-latitude boundaries during a substorm

Annales Geophysicae, Vol. 27 : 2157-2171

Pitkänen, Timo; Aikio, Anita T.; Kozlovsky, Alexander; et al.

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Rymdplasmafysik