All Stories

  1. Jets in the magnetosheath: IMF control of where they occur

    Article • Annales Geophysicae, August 2019, Copernicus GmbH

    Heli Hietala

  2. THEMIS Observations of Particle Acceleration by a Magnetosheath Jet‐Driven Bow Wave

    Article • Geophysical Research Letters, July 2019, American Geophysical Union (AGU)

    Heli Hietala

  3. On the alignment of velocity and magnetic fields within magnetosheath jets

    Article • Annales Geophysicae Discussions, July 2019, Copernicus GmbH

    Heli Hietala

  4. FORESAIL‐1 CubeSat Mission to Measure Radiation Belt Losses and Demonstrate Deorbiting

    Article • Journal of Geophysical Research Space Physics, July 2019, American Geophysical Union (AGU)

    Heli Hietala

  5. Jets in the Magnetosheath: IMF Control of Where They Occur

    Article • Annales Geophysicae Discussions, May 2019, Copernicus GmbH

    Heli Hietala

  6. Outer Van Allen Radiation Belt Response to Interacting Interplanetary Coronal Mass Ejections

    Article • Journal of Geophysical Research Space Physics, March 2019, American Geophysical Union (AGU)

    Heli Hietala

  7. Direct observations of a surface eigenmode of the dayside magnetopause

    Article • Nature Communications, February 2019, Springer Science + Business Media

    Heli Hietala

  8. The response of Earth's electron radiation belts to geomagnetic storms: Statistics from the Van Allen Probes era including effects from different storm drivers

    Article • Journal of Geophysical Research Space Physics, January 2019, American Geophysical Union (AGU)

    Heli Hietala

  9. Magnetosheath jet properties and evolution as determined by a global hybrid-Vlasov simulation

    Article • Annales Geophysicae, September 2018, Copernicus GmbH

    Heli Hietala

  10. Dayside Magnetospheric and Ionospheric Responses to a Foreshock Transient on 25 June 2008: 2.2-D Evolution Based on Dayside Auroral Imaging

    Article • Journal of Geophysical Research Space Physics, August 2018, American Geophysical Union (AGU)

    Heli Hietala, Boyi Wang

  11. Impacts of Magnetosheath High-Speed Jets on the Magnetosphere and Ionosphere Measured by Optical Imaging and Satellite Observations

    Article • Journal of Geophysical Research Space Physics, June 2018, American Geophysical Union (AGU)

    Heli Hietala, Boyi Wang

  12. Jets Downstream of Collisionless Shocks

    Article • Space Science Reviews, June 2018, Springer Science + Business Media

    Heli Hietala

  13. Plasma flow patterns in and around magnetosheath jets

    Article • Annales Geophysicae, May 2018, Copernicus GmbH

    Heli Hietala

  14. Investigating the anatomy of magnetosheath jets – MMS observations

    Article • Annales Geophysicae, April 2018, Copernicus GmbH

    Heli Hietala

  15. Magnetosheath jet properties and evolution as determined by a global hybrid-Vlasov simulation

    Article • Annales Geophysicae Discussions, March 2018, Copernicus GmbH

    Heli Hietala

  16. Magnetosheath jet properties and evolution as determined by a global hybrid-Vlasov simulation

    Article • March 2018, Copernicus GmbH

    Heli Hietala

  17. In situ observations of a magnetosheath high-speed jet triggering magnetopause reconnection

    Article • Geophysical Research Letters, February 2018, Wiley

    Heli Hietala

  18. Magnetotail fast flow occurrence rate and dawn-dusk asymmetry at X G S M ∼ -60 R ...

    Article • Journal of Geophysical Research Space Physics, January 2018, Wiley

    Heli Hietala

  19. Global MHD simulations of the Earth's bow shock shape and motion under variable solar wind conditions

    Article • Journal of Geophysical Research Space Physics, December 2017, Wiley

    Heli Hietala

  20. Tail reconnection in the global magnetospheric context: Vlasiator first results

    Article • Annales Geophysicae, November 2017, Copernicus GmbH

    Heli Hietala

  21. Different Types of Ion Populations Upstream of the 2013 October 8 Interplanetary Shock

    Article • The Astrophysical Journal Letters, November 2017, American Astronomical Society

    Heli Hietala

  22. Magnetosheath High-Speed Jets: Internal Structure and Interaction With Ambient Plasma

    Article • Journal of Geophysical Research Space Physics, October 2017, Wiley

    Heli Hietala, Anonymous User

  23. Fermi acceleration of electrons inside foreshock transient cores

    Article • Journal of Geophysical Research Space Physics, September 2017, Wiley

    Heli Hietala

  24. Energetic ion leakage from foreshock transient cores

    Article • Journal of Geophysical Research Space Physics, July 2017, American Geophysical Union (AGU)

    Heli Hietala

  25. Statistical study of particle acceleration in the core of foreshock transients

    Article • Journal of Geophysical Research Space Physics, July 2017, American Geophysical Union (AGU)

    Heli Hietala

  26. Statistical properties of solar wind reconnection exhausts

    Article • Journal of Geophysical Research Space Physics, June 2017, American Geophysical Union (AGU)

    Heli Hietala

  27. Growth rate measurement of ULF waves in the ion foreshock

    Article • Geophysical Research Letters, March 2017, American Geophysical Union (AGU)

    Heli Hietala

  28. Reconnection rates and X line motion at the magnetopause: Global 2D‐3V hybrid‐Vlasov simulation results

    Article • Journal of Geophysical Research Space Physics, March 2017, American Geophysical Union (AGU)

    Heli Hietala

  29. Ion density and temperature profiles along ( X GSM ) and across ( Z GSM ) the magnetotail as observed by THEMIS, Geotail, and ARTEMIS

    Article • Journal of Geophysical Research Space Physics, February 2017, American Geophysical Union (AGU)

    Heli Hietala

  30. Observational properties of dayside throat aurora and implications on the possible generation mechanisms

    Article • Journal of Geophysical Research Space Physics, February 2017, American Geophysical Union (AGU)

    Professor De-Sheng Han, Heli Hietala

  31. Ion dynamics in magnetotail reconnection in the presence of density asymmetry

    Article • Journal of Geophysical Research Space Physics, February 2017, American Geophysical Union (AGU)

    Heli Hietala

  32. Evidence for transient, local ion foreshocks caused by dayside magnetopause reconnection

    Article • Annales Geophysicae, November 2016, Copernicus GmbH

    Heli Hietala

  33. Observations of Hall Reconnection Physics Far Downstream of the X Line

    Article • Physical Review Letters, October 2016, American Physical Society (APS)

    Heli Hietala

  34. Strong current sheet at a magnetosheath jet: Kinetic structure and electron acceleration

    Article • Journal of Geophysical Research Space Physics, October 2016, American Geophysical Union (AGU)

    Heli Hietala

  35. Observations of a new foreshock region upstream of a foreshock bubble's shock

    Article • Geophysical Research Letters, May 2016, American Geophysical Union (AGU)

    Heli Hietala

  36. Geoeffective jets impacting the magnetopause are very common

    Article • Journal of Geophysical Research Space Physics, April 2016, American Geophysical Union (AGU)

    Heli Hietala

  37. Development of bifurcated current sheets in solar wind reconnection exhausts

    Article • Geophysical Research Letters, December 2015, American Geophysical Union (AGU)

    Heli Hietala

  38. The effects of geomagnetic storms on electrons in Earth's radiation belts

    Article • Geophysical Research Letters, November 2015, American Geophysical Union (AGU)

    Heli Hietala

  39. ULF foreshock under radial IMF: THEMIS observations and global kinetic simulation Vlasiator results compared

    Article • Journal of Geophysical Research Space Physics, October 2015, American Geophysical Union (AGU)

    Heli Hietala

  40. Ion temperature anisotropy across a magnetotail reconnection jet

    Article • Geophysical Research Letters, September 2015, American Geophysical Union (AGU)

    Heli Hietala

  41. Unraveling the drivers of the storm time radiation belt response

    Article • Geophysical Research Letters, May 2015, American Geophysical Union (AGU)

    Heli Hietala, Dr Geoffrey D Reeves

  42. Detection of small-scale folds at a solar wind reconnection exhaust

    Article • Journal of Geophysical Research Space Physics, January 2015, American Geophysical Union (AGU)

    Heli Hietala

  43. Ion reflection and acceleration near magnetotail dipolarization fronts associated with magnetic reconnection

    Article • Journal of Geophysical Research Space Physics, January 2015, American Geophysical Union (AGU)

    Heli Hietala

  44. What Controls the Structure and Dynamics of Earth’s Magnetosphere?

    Article • Space Science Reviews, June 2014, Springer Science + Business Media

    Heli Hietala

  45. Depleting effects of ICME-driven sheath regions on the outer electron radiation belt

    Article • Geophysical Research Letters, April 2014, American Geophysical Union (AGU)

    Heli Hietala

  46. Sequentially released tilted flux ropes in the Earth's magnetotail

    Article • Plasma Physics and Controlled Fusion, April 2014, Institute of Physics Publishing

    Heli Hietala

  47. On the generation of magnetosheath high-speed jets by bow shock ripples

    Article • Journal of Geophysical Research Space Physics, November 2013, American Geophysical Union (AGU)

    Heli Hietala

  48. Anti-sunward high-speed jets in the subsolar magnetosheath

    Article • Annales Geophysicae, October 2013, Copernicus GmbH

    Heli Hietala

  49. Injection of thermal and suprathermal seed particles into coronal shocks of varying obliquity

    Article • Astronomy and Astrophysics, October 2013, EDP Sciences

    Heli Hietala

  50. Magnetic field and dynamic pressure ULF fluctuations in coronal-mass-ejection-driven sheath regions

    Article • Annales Geophysicae, September 2013, Copernicus GmbH

    Heli Hietala

  51. A comparison of bow shock models with Cluster observations during low Alfvén Mach number magnetic clouds

    Article • Annales Geophysicae, June 2013, Copernicus GmbH

    Heli Hietala

  52. Analysis of the substructure within a complex magnetic cloud on 3–4 September 2008

    Article • Annales Geophysicae, March 2013, Copernicus GmbH

    Heli Hietala

  53. PARTICLE ACCELERATION IN SHOCK–SHOCK INTERACTION: MODEL TO DATA COMPARISON

    Article • The Astrophysical Journal Letters, May 2012, Institute of Physics Publishing

    Heli Hietala

  54. Supermagnetosonic subsolar magnetosheath jets and their effects: from the solar wind to the ionospheric convection

    Article • Annales Geophysicae, January 2012, Copernicus GmbH

    Heli Hietala

  55. In situ observations of particle acceleration in shock-shock interaction

    Article • Journal of Geophysical Research Atmospheres, October 2011, American Geophysical Union (AGU)

    Heli Hietala

  56. Supermagnetosonic Jets behind a Collisionless Quasiparallel Shock

    Article • Physical Review Letters, December 2009, American Physical Society (APS)

    Heli Hietala

  57. Damage in impact fragmentation

    Article • International Journal of Fracture, September 2009, Springer Science + Business Media

    Heli Hietala

  58. Damage in impact fragmentation

    Article • January 2009, Springer Science + Business Media

    Heli Hietala