Publications: DR Heli Johanna Hietala

Nakamura R, de Wit TD, Jones GH, Taylor MGGT, André N, Goetz C, Hadid LZ, Hayes LA et al. ( 2025 ) . Establishing a European Heliophysics Community (EHC) . Annales Geophysicae vol. 43 , ( 2 ) 855 - 879 .

Ala-Lahti M, Pulkkinen TI, Suni J, Hietala H, Good SW, Akhavan-Tafti M, Palmroth M, Kilpua EKJ ( 2025 ) . Magnetic Reconnection in the Heliospheric Current Sheet Embedded in an Interplanetary Coronal Mass Ejection Sheath . The Astrophysical Journal Letters vol. 994 , ( 1 )

Lindberg M, Shi X, Hietala H, Vuorinen L, Raptis S, Koller F, Lalti A ( 2025 ) . Fermi Acceleration of Electrons at Earth's Bow Shock Due To Current Sheet Interaction . Journal of Geophysical Research: Space Physics vol. 130 , ( 9 ) Article e2025JA034314 ,

Lindberg M, Hietala H, Shirazul K, Trotta D, Sulaiman AH, Burkholder BL, Dimmock A ( 2025 ) . Statistical Study of Magnetic Overshoots at Collisionless Shocks . Journal of Geophysical Research Space Physics vol. 130 , ( 5 )

Trotta D, Dimmock A, Hietala H, Blanco-Cano X, Horbury TS, Vainio R, Dresing N, Jebaraj IC et al. ( 2025 ) . An Overview of Solar Orbiter Observations of Interplanetary Shocks in Solar Cycle 25 . The Astrophysical Journal Supplement Series vol. 277 , ( 1 )

Krämer E, Koller F, Suni J, LaMoury AT, Pöppelwerth A, Glebe G, Mohammed-Amin T, Raptis S et al. ( 2024 ) . Jets Downstream of Collisionless Shocks: Recent Discoveries and Challenges . Space Science Reviews vol. 221 , ( 1 ) Article 4 ,

Trotta D, Dimmock AP, Blanco-Cano X, Forsyth RJ, Hietala H, Fargette N, Larosa A, Lugaz N et al. ( 2024 ) . Observation of a Fully-formed Forward–Reverse Shock Pair due to the Interaction between Two Coronal Mass Ejections at 0.5 au . The Astrophysical Journal Letters vol. 971 , ( 2 ) l35 - l35 .

Hietala H, Trotta D, Fedeli A, Wilson LB, Vuorinen L, Coburn JT ( 2024 ) . Candidates for downstream jets at interplanetary shocks . Monthly Notices of the Royal Astronomical Society vol. 531 , ( 2 ) 2415 - 2421 .

Trotta D, Larosa A, Nicolaou G, Horbury TS, Matteini L, Hietala H, Blanco-Cano X, Franci L et al. ( 2024 ) . Properties of an Interplanetary Shock Observed at 0.07 and 0.7 au by Parker Solar Probe and Solar Orbiter . The Astrophysical Journal vol. 962 , ( 2 ) 147 - 147 .

Afanasiev A, Vainio R, Trotta D, Nyberg S, Sheshvan NT, Hietala H, Dresing N ( 2023 ) . Self-consistent modeling of the energetic storm particle event of November 10, 2012 . Astronomy & Astrophysics vol. 679 ,

Trotta D, Horbury TS, Lario D, Vainio R, Dresing N, Dimmock A, Giacalone J, Hietala H et al. ( 2023 ) . Irregular Proton Injection to High Energies at Interplanetary Shocks . The Astrophysical Journal Letters vol. 957 , ( 2 )

Vuorinen L, Hietala H, LaMoury AT, Plaschke F ( 2023 ) . Solar Wind Parameters Influencing Magnetosheath Jet Formation: Low and High IMF Cone Angle Regimes . Journal of Geophysical Research Space Physics vol. 128 , ( 10 )

Collinson GA, Hietala H, Plaschke F, Karlsson T, Wilson LB, Archer M, Battarbee M, Blanco‐Cano X et al. ( 2023 ) . Shocklets and Short Large Amplitude Magnetic Structures (SLAMS) in the High Mach Foreshock of Venus . Geophysical Research Letters vol. 50 , ( 18 )

Owens MJ, Lockwood M, Barnard LA, Yardley SL, Hietala H, LaMoury AT, Vuorinen L ( 2023 ) . Annual Variations in the Near-Earth Solar Wind . Solar Physics vol. 298 , ( 9 )

Vuorinen L, LaMoury AT, Hietala H, Koller F ( 2023 ) . Magnetosheath Jets Over Solar Cycle 24: An Empirical Model . Journal of Geophysical Research Space Physics vol. 128 , ( 8 )

Trotta D, Pezzi O, Burgess D, Preisser L, Blanco-Cano X, Kajdic P, Hietala H, Horbury TS et al. ( 2023 ) . Three-dimensional modelling of the shock–turbulence interaction . Monthly Notices of the Royal Astronomical Society vol. 525 , ( 2 ) 1856 - 1866 .

Trotta D, Hietala H, Horbury T, Dresing N, Vainio R, Wilson L, Plotnikov I, Kilpua E ( 2023 ) . Multi-spacecraft observations of shocklets at an interplanetary shock . Monthly Notices of the Royal Astronomical Society vol. 520 , ( 1 ) 437 - 445 .

Wang B, Nishimura Y, Hietala H, Angelopoulos V ( 2022 ) . Investigating the Role of Magnetosheath High‐Speed Jets in Triggering Dayside Ground Magnetic Ultra‐Low Frequency Waves . Geophysical Research Letters vol. 49 , ( 22 )

Trotta D, Vuorinen L, Hietala H, Horbury T, Dresing N, Gieseler J, Kouloumvakos A, Price D et al. ( 2022 ) . Single-spacecraft techniques for shock parameters estimation: A systematic approach . Frontiers in Astronomy and Space Sciences vol. 9 ,

Vuorinen L, LaMoury A, Masongsong E, Hietala H ( 2022 ) . Space Raindrops Splashing on Earth’s Magnetic Umbrella . American Geophysical Union (AGU)

Vuorinen L, Vainio R, Hietala H, Liu TZ ( 2022 ) . Monte Carlo Simulations of Electron Acceleration at Bow Waves Driven by Fast Jets in the Earth’s Magnetosheath . The Astrophysical Journal vol. 934 , ( 2 ) 165 - 165 .

Trotta D, Pecora F, Settino A, Perrone D, Hietala H, Horbury T, Matthaeus W, Burgess D et al. ( 2022 ) . On the Transmission of Turbulent Structures across the Earth’s Bow Shock . The Astrophysical Journal vol. 933 , ( 2 )

Koller F, Temmer M, Preisser L, Plaschke F, Geyer P, Jian LK, Roberts OW, Hietala H et al. ( 2022 ) . Magnetosheath Jet Occurrence Rate in Relation to CMEs and SIRs . Journal of Geophysical Research Space Physics vol. 127 , ( 4 )

Telloni D, Scolini C, Möstl C, Zank GP, Zhao L-L, Weiss AJ, Reiss MA, Laker R et al. ( 2021 ) . Study of two interacting interplanetary coronal mass ejections encountered by Solar Orbiter during its first perihelion passage . Astronomy & Astrophysics vol. 656 ,

LaMoury AT, Hietala H, Plaschke F, Vuorinen L, Eastwood JP ( 2021 ) . Solar Wind Control of Magnetosheath Jet Formation and Propagation to the Magnetopause . Journal of Geophysical Research Space Physics vol. 126 , ( 9 )

Vuorinen L, Hietala H, Plaschke F, LaMoury AT ( 2021 ) . Magnetic Field in Magnetosheath Jets: A Statistical Study of BZ Near the Magnetopause . Journal of Geophysical Research Space Physics vol. 126 , ( 9 )

Desai RT, Freeman MP, Eastwood JP, Eggington JWB, Archer MO, Shprits YY, Meredith NP, Staples FA et al. ( 2021 ) . Interplanetary Shock‐Induced Magnetopause Motion: Comparison Between Theory and Global Magnetohydrodynamic Simulations . Geophysical Research Letters vol. 48 , ( 16 )

Runov A, Grandin M, Palmroth M, Battarbee M, Ganse U, Hietala H, Hoilijoki S, Kilpua E et al. ( 2021 ) . Ion distribution functions in magnetotail reconnection: global hybrid-Vlasov simulation results . Annales Geophysicae vol. 39 , ( 4 ) 599 - 612 .

Woodham LD, Horbury TS, Matteini L, Woolley T, Laker R, Bale SD, Nicolaou G, Stawarz JE et al. ( 2021 ) . Enhanced proton parallel temperature inside patches of switchbacks in the inner heliosphere . Astronomy & Astrophysics vol. 650 ,

Robertson SL, Eastwood JP, Stawarz JE, Hietala H, Phan TD, Lavraud B, Burch JL, Giles B et al. ( 2021 ) . Electron Trapping in Magnetic Mirror Structures at the Edge of Magnetopause Flux Ropes . Journal of Geophysical Research Space Physics vol. 126 , ( 4 )

Turner DL, Wilson LB, Goodrich KA, Madanian H, Schwartz SJ, Liu TZ, Johlander A, Caprioli D et al. ( 2021 ) . Direct Multipoint Observations Capturing the Reformation of a Supercritical Fast Magnetosonic Shock . The Astrophysical Journal Letters vol. 911 , ( 2 ) l31 - l31 .

Omelchenko YA, Roytershteyn V, Chen L-J, Ng J, Hietala H ( 2021 ) . HYPERS simulations of solar wind interactions with the Earth's magnetosphere and the Moon . Journal of Atmospheric and Solar-Terrestrial Physics vol. 215 ,

Chen Y, Tóth G, Hietala H, Vines SK, Zou Y, Nishimura Y, Silveira MVD, Guo Z et al. ( 2020 ) . Magnetohydrodynamic With Embedded Particle‐In‐Cell Simulation of the Geospace Environment Modeling Dayside Kinetic Processes Challenge Event . Earth and Space Science vol. 7 , ( 11 )

Plaschke F, Hietala H, Vörös Z ( 2020 ) . Scale Sizes of Magnetosheath Jets . Journal of Geophysical Research Space Physics vol. 125 , ( 9 )

Liu TZ, Hietala H, Angelopoulos V, Vainio R, Omelchenko Y ( 2020 ) . Electron Acceleration by Magnetosheath Jet‐Driven Bow Waves . Journal of Geophysical Research Space Physics vol. 125 , ( 7 )

Liu TZ, Hietala H, Angelopoulos V, Omelchenko Y, Vainio R, Plaschke F ( 2020 ) . Statistical Study of Magnetosheath Jet‐Driven Bow Waves . Journal of Geophysical Research Space Physics vol. 125 , ( 7 )

Oleynik P, Vainio R, Punkkinen A, Dudnik O, Gieseler J, Hedman H-P, Hietala H, Hæggström E et al. ( 2020 ) . Calibration of RADMON radiation monitor onboard Aalto-1 CubeSat . Advances in Space Research vol. 66 , ( 1 ) 42 - 51 .

Gieseler J, Oleynik P, Hietala H, Vainio R, Hedman H-P, Peltonen J, Punkkinen A, Punkkinen R et al. ( 2020 ) . Radiation monitor RADMON aboard Aalto-1 CubeSat: First results . Advances in Space Research vol. 66 , ( 1 ) 52 - 65 .

Dimmock AP, Hietala H, Zou Y ( 2020 ) . Compiling Magnetosheath Statistical Data Sets Under Specific Solar Wind Conditions: Lessons Learnt From the Dayside Kinetic Southward IMF GEM Challenge . Earth and Space Science vol. 7 , ( 6 )

Haaland S, Paschmann G, Øieroset M, Phan T, Hasegawa H, Fuselier SA, Constantinescu V, Eriksson S et al. ( 2020 ) . Characteristics of the Flank Magnetopause: MMS Results . Journal of Geophysical Research Space Physics vol. 125 , ( 3 )

Hietala H, Dimmock AP, Zou Y, Garcia‐Sage K ( 2020 ) . The Challenges and Rewards of Running a Geospace Environment Modeling Challenge . Journal of Geophysical Research Space Physics vol. 125 , ( 3 )

Plaschke F, Jernej M, Hietala H, Vuorinen L ( 2020 ) . On the alignment of velocity and magnetic fields within magnetosheath jets . Annales Geophysicae vol. 38 , ( 2 ) 287 - 296 .

Gieseler J, Oleynik P, Hietala H, Vainio R, Hedman H-P, Peltonen J, Punkkinen A, Punkkinen R et al. ( 2019 ) . Radiation Monitor RADMON aboard Aalto-1 CubeSat: First results .

Vuorinen L, Hietala H, Plaschke F ( 2019 ) . Jets in the magnetosheath: IMF control of where they occur . Annales Geophysicae vol. 37 , ( 4 ) 689 - 697 .

Palmroth M, Praks J, Vainio R, Janhunen P, Kilpua EKJ, Afanasiev A, Ala‐Lahti M, Alho A et al. ( 2019 ) . FORESAIL‐1 CubeSat Mission to Measure Radiation Belt Losses and Demonstrate Deorbiting . Journal of Geophysical Research Space Physics vol. 124 , ( 7 ) 5783 - 5799 .

Liu TZ, Hietala H, Angelopoulos V, Omelchenko Y, Roytershteyn V, Vainio R ( 2019 ) . THEMIS Observations of Particle Acceleration by a Magnetosheath Jet‐Driven Bow Wave . Geophysical Research Letters vol. 46 , ( 14 ) 7929 - 7936 .

FORESAIL collaboration, Palmroth M, Praks J, Vainio R, Janhunen P, Kilpua EKJ, Ganushkina NY, Afanasiev A et al. ( 2019 ) . FORESAIL-1 cubesat mission to measure radiation belt losses and demonstrate de-orbiting .

Kilpua EKJ, Turner DL, Jaynes AN, Hietala H, Koskinen HEJ, Osmane A, Palmroth M, Pulkkinen TI et al. ( 2019 ) . Outer Van Allen Radiation Belt Response to Interacting Interplanetary Coronal Mass Ejections . Journal of Geophysical Research Space Physics vol. 124 , ( 3 ) 1927 - 1947 .

Turner DL, Kilpua EKJ, Hietala H, Claudepierre SG, O'Brien TP, Fennell JF, Blake JB, Jaynes AN et al. ( 2019 ) . The Response of Earth's Electron Radiation Belts to Geomagnetic Storms: Statistics From the Van Allen Probes Era Including Effects From Different Storm Drivers . Journal of Geophysical Research Space Physics vol. 124 , ( 2 ) 1013 - 1034 .

Archer MO, Hietala H, Hartinger MD, Plaschke F, Angelopoulos V ( 2019 ) . Direct observations of a surface eigenmode of the dayside magnetopause . Nature Communications vol. 10 , ( 1 )

Palmroth M, Hietala H, Plaschke F, Archer M, Karlsson T, Blanco-Cano X, Sibeck D, Kajdič P et al. ( 2018 ) . Magnetosheath jet properties and evolution as determined by a global hybrid-Vlasov simulation . Annales Geophysicae vol. 36 , ( 5 ) 1171 - 1182 .

Wang B, Nishimura Y, Hietala H, Shen X, Shi Q, Zhang H, Lyons L, Zou Y et al. ( 2018 ) . Dayside Magnetospheric and Ionospheric Responses to a Foreshock Transient on 25 June 2008: 2. 2‐D Evolution Based on Dayside Auroral Imaging . Journal of Geophysical Research Space Physics vol. 123 , ( 8 ) 6347 - 6359 .

Wang B, Nishimura Y, Hietala H, Lyons L, Angelopoulos V, Plaschke F, Ebihara Y, Weatherwax A ( 2018 ) . Impacts of Magnetosheath High‐Speed Jets on the Magnetosphere and Ionosphere Measured by Optical Imaging and Satellite Observations . Journal of Geophysical Research Space Physics vol. 123 , ( 6 ) 4879 - 4894 .

Plaschke F, Hietala H, Archer M, Blanco-Cano X, Kajdič P, Karlsson T, Lee SH, Omidi N et al. ( 2018 ) . Jets Downstream of Collisionless Shocks . Space Science Reviews vol. 214 , ( 5 )

Plaschke F, Hietala H ( 2018 ) . Plasma flow patterns in and around magnetosheath jets . Annales Geophysicae vol. 36 , ( 3 ) 695 - 703 .

Karlsson T, Plaschke F, Hietala H, Archer M, Blanco-Cano X, Kajdič P, Lindqvist P-A, Marklund G et al. ( 2018 ) . Investigating the anatomy of magnetosheath jets – MMS observations . Annales Geophysicae vol. 36 , ( 2 ) 655 - 677 .

Kiehas SA, Runov A, Angelopolos V, Hietala H, Korovinksiy D ( 2018 ) . Magnetotail Fast Flow Occurrence Rate and Dawn‐Dusk Asymmetry at XGSM ∼ −60 RE . Journal of Geophysical Research Space Physics vol. 123 , ( 3 ) 1767 - 1778 .

Hietala H, Phan TD, Angelopoulos V, Oieroset M, Archer MO, Karlsson T, Plaschke F ( 2018 ) . In Situ Observations of a Magnetosheath High‐Speed Jet Triggering Magnetopause Reconnection . Geophysical Research Letters vol. 45 , ( 4 ) 1732 - 1740 .

Mejnertsen L, Eastwood JP, Hietala H, Schwartz SJ, Chittenden JP ( 2018 ) . Global MHD Simulations of the Earth's Bow Shock Shape and Motion Under Variable Solar Wind Conditions . Journal of Geophysical Research Space Physics vol. 123 , ( 1 ) 259 - 271 .

Palmroth M, Hoilijoki S, Juusola L, Pulkkinen TI, Hietala H, Pfau-Kempf Y, Ganse U, von Alfthan S et al. ( 2017 ) . Tail reconnection in the global magnetospheric context: Vlasiator first results . Annales Geophysicae vol. 35 , ( 6 ) 1269 - 1274 .

Kajdič P, Hietala H, Blanco-Cano X ( 2017 ) . Different Types of Ion Populations Upstream of the 2013 October 8 Interplanetary Shock . The Astrophysical Journal Letters vol. 849 , ( 2 )

Plaschke F, Karlsson T, Hietala H, Archer M, Vörös Z, Nakamura R, Magnes W, Baumjohann W et al. ( 2017 ) . Magnetosheath High‐Speed Jets: Internal Structure and Interaction With Ambient Plasma . Journal of Geophysical Research Space Physics vol. 122 , ( 10 ) 10 - 175 .

Liu TZ, Lu S, Angelopoulos V, Hietala H, Wilson LB ( 2017 ) . Fermi acceleration of electrons inside foreshock transient cores . Journal of Geophysical Research Space Physics vol. 122 , ( 9 ) 9248 - 9263 .

Liu TZ, Angelopoulos V, Hietala H ( 2017 ) . Energetic ion leakage from foreshock transient cores . Journal of Geophysical Research Space Physics vol. 122 , ( 7 ) 7209 - 7225 .

Liu TZ, Angelopoulos V, Hietala H, Wilson LB ( 2017 ) . Statistical study of particle acceleration in the core of foreshock transients . Journal of Geophysical Research Space Physics vol. 122 , ( 7 ) 7197 - 7208 .

Mistry R, Eastwood JP, Phan TD, Hietala H ( 2017 ) . Statistical properties of solar wind reconnection exhausts . Journal of Geophysical Research Space Physics vol. 122 , ( 6 ) 5895 - 5909 .

Dorfman S, Hietala H, Astfalk P, Angelopoulos V ( 2017 ) . Growth rate measurement of ULF waves in the ion foreshock . Geophysical Research Letters vol. 44 , ( 5 ) 2120 - 2128 .

Hoilijoki S, Ganse U, Pfau‐Kempf Y, Cassak PA, Walsh BM, Hietala H, von Alfthan S, Palmroth M ( 2017 ) . Reconnection rates and X line motion at the magnetopause: Global 2D‐3V hybrid‐Vlasov simulation results . Journal of Geophysical Research Space Physics vol. 122 , ( 3 ) 2877 - 2888 .

Hietala H, Artemyev AV, Angelopoulos V ( 2017 ) . Ion dynamics in magnetotail reconnection in the presence of density asymmetry . Journal of Geophysical Research Space Physics vol. 122 , ( 2 ) 2010 - 2023 .

Han D, Hietala H, Chen X, Nishimura Y, Lyons LR, Liu J, Hu H, Yang H ( 2017 ) . Observational properties of dayside throat aurora and implications on the possible generation mechanisms . Journal of Geophysical Research Space Physics vol. 122 , ( 2 ) 1853 - 1870 .

Artemyev AV, Angelopoulos V, Hietala H, Runov A, Shinohara I ( 2017 ) . Ion density and temperature profiles along (XGSM) and across (ZGSM) the magnetotail as observed by THEMIS, Geotail, and ARTEMIS . Journal of Geophysical Research Space Physics vol. 122 , ( 2 ) 1590 - 1599 .

Pfau-Kempf Y, Hietala H, Milan SE, Juusola L, Hoilijoki S, Ganse U, von Alfthan S, Palmroth M ( 2016 ) . Evidence for transient, local ion foreshocks caused by dayside magnetopause reconnection . Annales Geophysicae vol. 34 , ( 11 ) 943 - 959 .

Mistry R, Eastwood JP, Haggerty CC, Shay MA, Phan TD, Hietala H, Cassak PA ( 2016 ) . Observations of Hall Reconnection Physics Far Downstream of the X Line . Physical Review Letters vol. 117 , ( 18 )

Eriksson E, Vaivads A, Graham DB, Khotyaintsev YV, Yordanova E, Hietala H, André M, Avanov LA et al. ( 2016 ) . Strong current sheet at a magnetosheath jet: Kinetic structure and electron acceleration . Journal of Geophysical Research Space Physics vol. 121 , ( 10 ) 9608 - 9618 .

Liu TZ, Hietala H, Angelopoulos V, Turner DL ( 2016 ) . Observations of a new foreshock region upstream of a foreshock bubble's shock . Geophysical Research Letters vol. 43 , ( 10 ) 4708 - 4715 .

Plaschke F, Hietala H, Angelopoulos V, Nakamura R ( 2016 ) . Geoeffective jets impacting the magnetopause are very common . Journal of Geophysical Research Space Physics vol. 121 , ( 4 ) 3240 - 3253 .

Mistry R, Eastwood JP, Phan TD, Hietala H ( 2015 ) . Development of bifurcated current sheets in solar wind reconnection exhausts . Geophysical Research Letters vol. 42 , ( 24 ) 10 - 520 .

Turner DL, O'Brien TP, Fennell JF, Claudepierre SG, Blake JB, Kilpua EKJ, Hietala H ( 2015 ) . The effects of geomagnetic storms on electrons in Earth's radiation belts . Geophysical Research Letters vol. 42 , ( 21 ) 9176 - 9184 .

Palmroth M, Archer M, Vainio R, Hietala H, Pfau‐Kempf Y, Hoilijoki S, Hannuksela O, Ganse U et al. ( 2015 ) . ULF foreshock under radial IMF: THEMIS observations and global kinetic simulation Vlasiator results compared . Journal of Geophysical Research Space Physics vol. 120 , ( 10 ) 8782 - 8798 .

Hietala H, Drake JF, Phan TD, Eastwood JP, McFadden JP ( 2015 ) . Ion temperature anisotropy across a magnetotail reconnection jet . Geophysical Research Letters vol. 42 , ( 18 ) 7239 - 7247 .

Kilpua EKJ, Hietala H, Turner DL, Koskinen HEJ, Pulkkinen TI, Rodriguez JV, Reeves GD, Claudepierre SG et al. ( 2015 ) . Unraveling the drivers of the storm time radiation belt response . Geophysical Research Letters vol. 42 , ( 9 ) 3076 - 3084 .

Eastwood JP, Goldman MV, Hietala H, Newman DL, Mistry R, Lapenta G ( 2015 ) . Ion reflection and acceleration near magnetotail dipolarization fronts associated with magnetic reconnection . Journal of Geophysical Research Space Physics vol. 120 , ( 1 ) 511 - 525 .

Mistry R, Eastwood JP, Hietala H ( 2015 ) . Detection of small‐scale folds at a solar wind reconnection exhaust . Journal of Geophysical Research Space Physics vol. 120 , ( 1 ) 30 - 42 .

Eastwood JP, Hietala H, Toth G, Phan TD, Fujimoto M ( 2014 ) . What Controls the Structure and Dynamics of Earth’s Magnetosphere? . Space Science Reviews vol. 188 , ( 1-4 ) 251 - 286 .

Hietala H, Kilpua EKJ, Turner DL, Angelopoulos V ( 2014 ) . Depleting effects of ICME‐driven sheath regions on the outer electron radiation belt . Geophysical Research Letters vol. 41 , ( 7 ) 2258 - 2265 .

Hietala H, Eastwood JP, Isavnin A ( 2014 ) . Sequentially released tilted flux ropes in the Earth's magnetotail . Plasma Physics and Controlled Fusion vol. 56 , ( 6 )

Hietala H, Plaschke F ( 2013 ) . On the generation of magnetosheath high‒speed jets by bow shock ripples . Journal of Geophysical Research Space Physics vol. 118 , ( 11 ) 7237 - 7245 .

Plaschke F, Hietala H, Angelopoulos V ( 2013 ) . Anti-sunward high-speed jets in the subsolar magnetosheath . Annales Geophysicae vol. 31 , ( 10 ) 1877 - 1889 .

Battarbee M, Vainio R, Laitinen T, Hietala H ( 2013 ) . Injection of thermal and suprathermal seed particles into coronal shocks of varying obliquity ⋆ . Astronomy & Astrophysics vol. 558 ,

Kilpua EKJ, Hietala H, Koskinen HEJ, Fontaine D, Turc L ( 2013 ) . Magnetic field and dynamic pressure ULF fluctuations in coronal-mass-ejection-driven sheath regions . Annales Geophysicae vol. 31 , ( 9 ) 1559 - 1567 .

Turc L, Fontaine D, Savoini P, Hietala H, Kilpua EKJ ( 2013 ) . A comparison of bow shock models with Cluster observations during low Alfvén Mach number magnetic clouds . Annales Geophysicae vol. 31 , ( 6 ) 1011 - 1019 .

Andreeova K, Kilpua EKJ, Hietala H, Koskinen HEJ, Isavnin A, Vainio R ( 2013 ) . Analysis of the substructure within a complex magnetic cloud on 3–4 September 2008 . Annales Geophysicae vol. 31 , ( 3 ) 555 - 562 .

Hietala H, Sandroos A, Vainio R ( 2012 ) . PARTICLE ACCELERATION IN SHOCK–SHOCK INTERACTION: MODEL TO DATA COMPARISON . The Astrophysical Journal Letters vol. 751 , ( 1 )

Hietala H, Partamies N, Laitinen TV, Clausen LBN, Facskó G, Vaivads A, Koskinen HEJ, Dandouras I et al. ( 2012 ) . Supermagnetosonic subsolar magnetosheath jets and their effects: from the solar wind to the ionospheric convection . Annales Geophysicae vol. 30 , ( 1 ) 33 - 48 .

Hietala H, Agueda N, Andréeová K, Vainio R, Nylund S, Kilpua EKJ, Koskinen HEJ ( 2011 ) . In situ observations of particle acceleration in shock‐shock interaction . Journal of Geophysical Research vol. 116 , ( A10 ) n/a - n/a .

Hietala H, Laitinen TV, Andréeová K, Vainio R, Vaivads A, Palmroth M, Pulkkinen TI, Koskinen HEJ et al. ( 2009 ) . Supermagnetosonic Jets behind a Collisionless Quasiparallel Shock . Physical Review Letters vol. 103 , ( 24 )

Sator N, Hietala H ( 2009 ) . Damage in impact fragmentation . International Journal of Fracture vol. 163 , ( 1-2 ) 101 - 108 .

Owens MJ, Lockwood M, Barnard LA, Yardley S, Hietala H, LaMoury AT, Vuorinen L . Annual Variations in the Near-Earth Solar Wind .