Items created by Laitinen, Timo Lauri mikael

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Dalla, Silvia ORCID: 0000-0002-7837-5780, Hutchinson, Adam, Hyndman, Ruth Alexandra, Kihara, K., Nitta, N., Rodríguez-García, L., Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783, Waterfall, Charlotte and Brown, D. S. (2025) Detection asymmetry in solar energetic particle events. Astronomy & Astrophysics, 696 (A12). ISSN 0004-6361

Hyndman, Ruth Alexandra, Dalla, Silvia ORCID: 0000-0002-7837-5780, Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783, Hutchinson, A., Cohen, C.M.S. and Wimmer-Schweingruber, R.F. (2025) Multi-spacecraft observations of the decay phase of solar energetic particle events. Astronomy & Astrophysics, 694 . ISSN 0004-6361

Rodríguez-García, L., Gómez-Herrero, R., Dresing, N., Balmaceda, L. A., Palmerio, E., Kouloumvakos, A., Jebaraj, I. C., Espinosa Lara, F., Roco, M. et al (2025) Solar energetic particles injected inside and outside a magnetic cloud: The widespread solar energetic particle event on 2022 January 20. Astronomy & Astrophysics, 694 . ISSN 0004-6361

Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 and Dalla, Silvia ORCID: 0000-0002-7837-5780 (2025) Interplay of large-scale drift and turbulence in the heliospheric propagation of solar energetic particles. The Astrophysical Journal, 979 (2). p. 106. ISSN 0004-637X

Reid, Hamish A. S., Musset, Sophie, Ryan, Daniel F., Andretta, Vincenzo, Auchère, Frédéric, Baker, Deborah, Benvenuto, Federico, Browning, Philippa, Buchlin, Éric et al (2023) The Solar Particle Acceleration Radiation and Kinetics (SPARK) Mission Concept. Aerospace, 10 (12).

Waterfall, Charlotte, Dalla, Silvia ORCID: 0000-0002-7837-5780, Marsh, M. S., Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 and Hutchinson, Adam (2023) Forecasting >300 MeV SEP Events: Extending SPARX to High Energies. Space Weather, 21 (6).

Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783, Dalla, Silvia ORCID: 0000-0002-7837-5780, Waterfall, Charlotte and Hutchinson, Adam (2023) Solar energetic particle event onsets at different heliolongitudes: The effect of turbulence in Parker spiral geometry. Astronomy & Astrophysics, 673 . ISSN 0004-6361

Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783, Dalla, Silvia ORCID: 0000-0002-7837-5780, Waterfall, Charlotte and Hutchinson, Adam (2023) An analytical model of turbulence in Parker spiral geometry and associated magnetic field line lengths. Astrophysical Journal, 943 (2). ISSN 0004-637X

Hutchinson, Adam, Dalla, Silvia ORCID: 0000-0002-7837-5780, Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 and Waterfall, Charlotte (2023) Modelling shock-like injections of solar energetic particles with 3D test particle simulations. Astronomy & Astrophysics . ISSN 0004-6361

Hutchinson, Adam, Dalla, Silvia ORCID: 0000-0002-7837-5780, Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 and Waterfall, Charlotte (2023) The impact of corotation on gradual solar energetic particle event intensity profiles. Astronomy & Astrophysics . ISSN 0004-6361

Waterfall, Charlotte, Dalla, Silvia ORCID: 0000-0002-7837-5780, Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783, Hutchinson, Adam and Marsh, Mike (2022) Modelling the transport of relativistic solar protons along a heliospheric current sheet during historic GLE events. The Astrophysical Journal .

Hutchinson, Adam, Dalla, Silvia ORCID: 0000-0002-7837-5780, Laitinen, Timo Lauri Mikael ORCID: 0000-0002-7719-7783, de Nolfo, Georgia, Bruno, Alessandro, Ryan, James M. and Waterfall, Charlotte O.G. (2022) Energetic proton back-precipitation onto the solar atmosphere in relation to long-duration gamma-ray flares. Astronomy and Astrophysics, 658 . ISSN 0004-6361

Kollhoff, A., Kouloumvakos, A., Lario, D., Dresing, N., Gómez-Herrero, R., Rodríguez-García, L., Malandraki, O. E., Richardson, I. G., Posner, A. et al (2021) The first widespread solar energetic particle event observed by Solar Orbiter on 2020 November 29. Astronomy and Astrophysics . ISSN 0004-6361

Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 and Dalla, Silvia ORCID: 0000-0002-7837-5780 (2020) "Access of energetic particles to a magnetic flux rope from external magnetic field lines". The Astrophysical Journal, 906 (1). ISSN 0004-637X

Strauss, R D, van den Berg, J P, Steyn, P J, Effenberger, F J, Wijsen, N, Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 and le Roux, J A (2020) Perpendicular diffusion of solar energetic particles: When is the diffusion approximation valid? Journal of Physics: Conference Series, 1620 (1). 012021. ISSN 1742-6588

Dalla, Silvia ORCID: 0000-0002-7837-5780, Nolfo, G. De, Bruno, A., Giacalone, J., Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783, Thomas, S., Batterbee, M. and Marsh, M.S (2020) 3D propagation of relativistic solar protons through interplanetary space. Astronomy and Astrophysics, 639 (A105). ISSN 0004-6361

Kocharov, Leon, Pesce-Rollins, Melissa, Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783, Mishev, Alexander, Kühl, Patrick, Klassen, Andreas, Jin, Meng, Omodei, Nicola, Longo, Francesco et al (2020) Interplanetary Protons versus Interacting Protons in the 2017 September 10 Solar Eruptive Event. The Astrophysical Journal, 890 (1). p. 13. ISSN 0004-637X

Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 and Dalla, Silvia ORCID: 0000-0002-7837-5780 (2019) From Sun to Interplanetary Space: What is the Pathlength of Solar Energetic Particles? The Astrophysical Journal, 887 (2). p. 222. ISSN 0004-637X

Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783, Dalla, Silvia ORCID: 0000-0002-7837-5780, Battarbee, Markus ORCID: 0000-0001-7055-551X and Marsh, M.S. (2018) Forecasting Solar Energetic Particle Fluence with Multi-Spacecraft Observations. Proceedings of IAU Symposium 335: Space Weather of the Heliosphere: Processes and Forecasts, 13 (s335). pp. 298-300. ISSN 1743-9213

Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783, Effenberger, Frederic, Kopp, Andreas and Dalla, Silvia ORCID: 0000-0002-7837-5780 (2018) The effect of turbulence strength on meandering field lines and Solar Energetic Particle event extents. Journal of Space Weather and Space Climate, 8 (A13).

Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783, Dalla, Silvia ORCID: 0000-0002-7837-5780 and Marriott, D. (2017) Early propagation of energetic particles across the mean field in turbulent plasmas. Monthly Notices of the Royal Astronomical Society, 470 (3). pp. 3149-3158. ISSN 0035-8711

Kocharov, Leon, Pohjolainen, Silja, Mishev, Alexander, Reiner, Mike J, Lee, Jeongwoo, Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783, Didkovsky, Leonid V, Pizzo, Victor J, Roksoon, Kim et al (2017) Investigating the origins of two extreme solar particle events: proton source profile and associated electromagnetic emissions. The Astrophysical Journal, 839 (79). ISSN 0004-637X

Dalla, Silvia ORCID: 0000-0002-7837-5780, Marsh, Michael, Zelina, p and Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 (2017) Time dependence of Fe/O ratio within a 3D solar energetic particle propagation model including drift. Astronomy and astrophysics, 598 . ISSN 0004-6361

Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 and Dalla, Silvia ORCID: 0000-0002-7837-5780 (2017) Energetic particle transport across the mean magnetic field: before diffusion. The Astrophysical Journal, 834 (2). p. 127. ISSN 0004-637X

Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783, Kopp, A, Effenberger, F, Dalla, S ORCID: 0000-0002-7837-5780 and Marsh, M.S. (2016) Solar energetic particle access to distant longitudes through turbulent field-line meandering. Astronomy and Astrophysics, 591 . A18. ISSN 0004-6361

Dalla, Silvia ORCID: 0000-0002-7837-5780, Marsh, Michael and Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 (2015) Drift-induced deceleration of Solar Energetic Particles. Astrophysical Journal, 808 (1). ISSN 0004-637X

Laitinen, Timo ORCID: 0000-0002-7719-7783, Huttunen-Heikinmaa, K, Valtonen, E and Dalla, Silvia ORCID: 0000-0002-7837-5780 (2015) Correcting for interplanetary scattering in velocity dispersion analysis of solar energetic particles. The Astrophysical Journal, 806 (1). ISSN 0004-637X

Kocharov, L, Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783, Vainio, R, Afanasiev, A, Mursula, M and Ryan, JM (2015) Solar interacting protons versus interplanetary protons in the core plus halo model of diffusive shock acceleration and stochastic re-acceleration. The Astrophysical Journal, 806 (80). ISSN 0004-637X

Marsh, M.S., Dalla, Silvia ORCID: 0000-0002-7837-5780, Dierckxsens, M, Laitinen, Timo Lauri Mikael ORCID: 0000-0002-7719-7783 and Crosby, N.B. (2015) SPARX: A modeling system for Solar Energetic Particle Radiation SpaceWeather forecasting. Space Weather: The International, 13 (6). pp. 386-394. ISSN 1539-4956

Kocharov, Leon, Laitinen, Timo Lauri Mikael ORCID: 0000-0002-7719-7783, Usoskin, Ilya and Vainio, Rami (2014) Transmission and Emission of Solar Energetic Particles in Semi-transparent Shocks. Astrophysical Journal Letters, 787 (2). L21.

Vainio, Rami, Pönni, Arttu, Battarbee, Markus, Koskinen, Hannu E. J., Afanasiev, Alexandr and Laitinen, Timo Lauri Mikael ORCID: 0000-0002-7719-7783 (2014) A semi-analytical foreshock model for energetic storm particle events inside 1 AU. Journal of Space Weather and Space Climate, 4 . A08. ISSN 2115-7251

Laitinen, Timo Lauri Mikael ORCID: 0000-0002-7719-7783, Dalla, Silvia ORCID: 0000-0002-7837-5780, Kelly, J. and Marsh, Michael (2013) ENERGETIC PARTICLE DIFFUSION IN CRITICALLY BALANCED TURBULENCE. The Astrophysical Journal, 764 (2). pp. 168-176. ISSN 0004-637X

Marsh, Michael, Dalla, Silvia ORCID: 0000-0002-7837-5780, Kelly, J. and Laitinen, Timo Lauri Mikael ORCID: 0000-0002-7719-7783 (2013) Drift induced perpendicular transport of solar energetic particles. The Astrophysical Journal, 774 (1). p. 4. ISSN 0004-637X

Kocharov, Leon, Laitinen, Timo Lauri Mikael ORCID: 0000-0002-7719-7783 and Vainio, Rami (2013) THE EFFECT OF TURBULENCE INTERMITTENCE ON THE EMISSION OF SOLAR ENERGETIC PARTICLES BY CORONAL AND INTERPLANETARY SHOCKS. Astrophysical Journal, 778 (1). L5. ISSN 2041-8205

Laitinen, Timo Lauri Mikael ORCID: 0000-0002-7719-7783, Dalla, Silvia ORCID: 0000-0002-7837-5780 and Marsh, M.S. (2013) Energetic particle cross-field propagation early in a solar event. The Astrophysical Journal, 773 (2). L29. ISSN 2041-8205

Battarbee, M., Vainio, R., Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 and Hietala, H. (2013) Injection of thermal and suprathermal seed particles into coronal shocks of varying obliquity. Astronomy and Astrophysics, 558 . A110. ISSN 0004-6361

Lange, S., Spanier, F., Battarbee, M., Vainio, R. and Laitinen, T. ORCID: 0000-0002-7719-7783 (2013) Particle scattering in turbulent plasmas with amplified wave modes. Astronomy & Astrophysics, 553 . A129. ISSN 0004-6361

Dalla, Silvia ORCID: 0000-0002-7837-5780, Marsh, M.S., Kelly, J. and Laitinen, T. ORCID: 0000-0002-7719-7783 (2013) Solar energetic particle drifts in the Parker spiral. Journal of Geophysical Research: Space Physics, 118 (10). pp. 5979-5985. ISSN 21699380

Kelly, J, Dalla, S. ORCID: 0000-0002-7837-5780 and Laitinen, T. ORCID: 0000-0002-7719-7783 (2012) Cross-field transport of solar energetic particles in a large-scale fluctuating magnetic field. The Astrophysical Journal, 750 (1). p. 47. ISSN 0004-637X

Battarbee, M., Laitinen, Timo Lauri Mikael ORCID: 0000-0002-7719-7783 and Vainio, R. (2011) Heavy-ion acceleration and self-generated waves in coronal shocks. Astronomy & Astrophysics, 535 (-). pp. 1-6. ISSN 0004-6361

Conference or Workshop Item

Rodríguez-García, Laura, Gómez-Herrero, Raúl, Dresing, Nina, Balmaceda, Laura A., Palmerio, Erika, Espinosa Lara, Francisco, Kouloumvakos, Athanasios, Jebarah, Immanuel, Palmroos, Christian et al (2024) The circumsolar solar energetic particle event on 2022 January 2022, particle spread within and outside a magnetic cloud. In: EGU General Assembly 2024, 14-19 April 2024, Vienna, Austria & Online.

Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 and Dalla, Silvia ORCID: 0000-0002-7837-5780 (2024) Modelling Solar Energetic Particle event onsets in the turbulent heliosphere. In: EGU General Assembly 2024, 14-19 April 2024, Vienna, Austria & Online.

Hutchinson, Adam, Dalla, Silvia ORCID: 0000-0002-7837-5780, Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 and Waterfall, Charlotte (2022) Test-Particle Simulations of SEPs Originating from an Expanding Shock-like Source. In: 37th International Cosmic Ray Conference (ICRC 2021), Online – Berlin, Germany, 12-23 July 2021.

Dalla, Silvia ORCID: 0000-0002-7837-5780, Bruno, Alessandro, Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783, de Nolfo, Georgia, Ryan, Jim, Hutchinson, Adam and Waterfall, Charlotte O.G. (2021) Can the number of relativistic solar proton 1 AU crossings be determined from neutron monitor data? In: 37th International Cosmic Ray Conference (ICRC2021), 12-23 July 2021, Online – Berlin, Germany.

Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 and Dalla, Silvia ORCID: 0000-0002-7837-5780 (2021) Access of cosmic rays to an ICME from external field lines. In: 37th International Cosmic Ray Conference (ICRC 2021), 12-23 July 2021, Online – Berlin, Germany.

Dalla, Silvia ORCID: 0000-0002-7837-5780, Swalwell, Bill ORCID: 0000-0002-8411-8000, Battarbee, Markus ORCID: 0000-0001-7055-551X, Marsh, M.S, Laitinen, Timo Lauri mikael ORCID: 0000-0002-7719-7783 and Proctor, S.J. (2018) Application of Test Particle Simulations to Solar Energetic Particle Forecasting. In: Space Weather of the Helisophere: Processes and Forecasts, July 2017.

Kelly, J., Dalla, S. and Laitinen, T. ORCID: 0000-0002-7719-7783 (2012) Test-particle simulations of SEP propagation in IMF with large-scale fluctuations. In: AIP Conference.