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Division on Solar-Terrestrial Sciences
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Division on Solar-Terrestrial Sciences

President: Margit Haberreiter (st@egu.eu)
Deputy President: Olga Malandraki (omaland@astro.noa.gr)

The ST Division considers all aspects of solar and heliospheric physics, specifically the solar-terrestrial connection. It covers the physical processes occurring on the Sun, in the solar wind, as well as in Earth's magnetosphere and ionosphere. Solar activity (e.g. coronal mass ejections, solar flares, solar energetic particle events) and the response of the near-Earth space environment to these solar phenomena are studied on a wide-range of temporal and spatial scales. Data analysis and interpretation of space-borne and ground-based data, as well as theoretical studies and different modeling techniques are used to better our understanding of how our local star defines the neighborhood that we live in.

Recent awardees

Eckart Marsch

Eckart Marsch

  • 2018
  • Hannes Alfvén Medal

The 2018 Hannes Alfvén Medal is awarded to Eckart Marsch for fundamental contributions to our understanding of the kinetic processes and plasma turbulence in the heliosphere, as well as for work that helped HELIOS become a successful mission and initiated the Solar Orbiter.


Ilya G. Usoskin

Ilya G. Usoskin

  • 2018
  • Julius Bartels Medal

The 2018 Julius Bartels Medal is awarded to Ilya G. Usoskin for his key contributions to long-term changes of cosmic rays and solar activity, qualifying him as a founder of the space climate discipline.


Natasha L. S. Jeffrey

Natasha L. S. Jeffrey

  • 2018
  • Division Outstanding Early Career Scientists Award

The 2018 Division Outstanding Early Career Scientists Award is awarded to Natasha L. S. Jeffrey for her outstanding achievements in improving the standard model of fast electrons produced in solar flares, thereby eliminating the long-standing low-energy cut-off uncertainty.


Eric R. Priest

Eric R. Priest

  • 2017
  • Hannes Alfvén Medal

The 2017 Hannes Alfvén Medal is awarded to Eric R. Priest for his fundamental contribution to the understanding of the mathematical complexity and physics of magnetic reconnection and the magnetic coupling of the convection zone with the solar atmosphere.


Tuija I. Pulkkinen

Tuija I. Pulkkinen

  • 2017
  • Julius Bartels Medal

The 2017 Julius Bartels Medal is awarded to Tuija I. Pulkkinen for her key contributions in solar-terrestrial science, scientific management, academic leadership, and services to the space community.


Emma Anderberg

Emma Anderberg

  • 2017
  • Outstanding Student Poster and PICO (OSPP) Awards

The 2017 Outstanding Student Poster and PICO (OSPP) Awards is awarded to Emma Anderberg Reconstructing the 11-year solar cycle length from cosmogenic radionuclides for the last 600 years

Latest posts from the ST blog

SunPy: a Python solar data analysis environment

Introduction For many years now we know that our star the Sun influences the Earth in many different ways, via the total solar irradiance, solar energetic particles and coronal mass ejections. Understanding the influence of the Sun on the Earth requires many different types of measurements. For example, NASA’s Solar Dynamics Observatory (SDO) spacecraft, produces over 1 terabyte of data per day (Pesnell et al., 2012), the bulk of it in the form of 4096 by 4096 pixel images in …


Jaime de la Cruz Rodriguez - ERC success in the field of solar physics

Jaime de la Cruz Rodriguez - ERC success in the field of solar physics

Coronal Heating Problem is one of the Sun’s unsolved mysteries where the corona is heated to over a million degrees and scientists have not figured out where the energy is coming from. Dr Jaime de la Cruz Rodriguez is tackling this 70 year old puzzle by first understanding the layer of the Sun below the corona – the chromosphere. He is awarded the prestigious starting grant by the European Research Council for his project SUNMAG: Understanding magnetic-field regulated heating and …


The average magnetic field and polar current system (AMPS) model

The average magnetic field and polar current system (AMPS) model

In this month’s post, Karl Magnus Laundal explains a newly developed empirical model for the full high latitude current system of the Earth’s ionosphere, AMPS (Average Magnetic field and Polar Current System). The model is available and documented in python code, published under the acronym pyAMPS. The community is invited to download and explore the electric currents and magentic field disturbances described by the model. The average magnetic field and polar current system (AMPS) model At about 10 times airline …


Prof. Ilya Usoskin - A discussion with an inquiry mind

Prof. Ilya Usoskin - A discussion with an inquiry mind

In the May issue of the Life of a Scientist we have the pleasure to talk to Prof. Ilya Usoskin from the Univeristy of Oulu, Finland. Among numerous things, he is the head of the Oulu Cosmic Ray station and receipent of this year’s Julius Bartels EGU Medal; a decision that was based: “on his contributions to the understanding of the heliosphere, long-term changes in the solar activity and solar-terrestrial relations”. Prof. Usoskin, can you please introduce yourself ? I …

Current issue of the EGU newsletter

This month we are highlighting two new studies published in EGU journals. One, published in The Cryosphere, shows how much sea level would rise following the collapse of two Antarctic ice shelves. The other, featured in Biogeosciences, shows that oxygen loss in the coastal Baltic Sea over the past century is unprecedented in the last 1500 years. You can read the press releases for both studies on the EGU website.

Also this month, we have opened the call for candidates for EGU Treasurer: if you'd like to nominate yourself or propose a candidate, you can do so by 15 September.

Finally, if you'd like to apply for financial support from the EGU to organise a meeting, make sure to submit an application by 15 August. This is also the deadline to submit proposals for Union Symposia and Great Debates at the EGU 2019 General Assembly. The deadline for scientific sessions is 6 September.

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