Upcoming Events

4th Swiss SCOSTEP Workshop

October 29-30

Institute for Data Science FHNW, Windisch > Online through Zoom

Deadline for abstracts: September 13

Bringing together Swiss scientists with an interest in solar-terrestrial physics.

Social and more

Journal Club

Tuesday, September 22, 14.30

Bi-weekly discussion group on topics in heliophysics and astroinformatics.

The topic to be discussed will be announced here a few days in advance.

Interested in joining us? Welcome!

Papers discussed before

Happy Quarter

Fridays 17.00

at the Institute for Data Science, now on Zoom.

Yes, many of us were still here at this time ☺︎

A tradition we inherited from the Berkeley Space Sciences Lab.

Everybody is welcome!

PhD Defence

September 29, 14.00

Erica Lastufka:

The Micro Solar Flare Apparatus (MiSolFA) and High-Energy Solar Observations From Multiple Perspectives.

Past Events

Launch of Solar Orbiter

2020 February 5, STIX Launch Party @FHNW Windisch

STIX – voyage to the sun

2020 Jan 22 – Feb 28 Lichtistallation auf dem Campusplatz Windisch
anlässlich des Starts der Raumsonde Solar Orbiter

Künstler: Stephan Athanas und Michael Omlin
Wir bedanken uns bei den folgenden Institutionen für die Unterstützung

Conferences and Meetings

2020 July 7-8, RHESSI Virtual Meeting: Preparing for the Next Decade in Hight-Energy Solar Physics Research

Results from ongoing analysis and interpretation of archival RHESSI data and coordinated observations of high-energy solar eruptive events using instruments/facilities such as EOVSA, NuSTAR, PSP, Fermi, and MinXSS. Sessions on preparing for future missions such as STIX/Solar Orbiter and FIERCE.


2019 July 5, Investigating the two extremes of solar activity using data from the Murchison Widefield Array, Special Seminar with Surajit Mondal, National Centre for Radio Astrophysics (NCRA), Pune, India


The solar activity is of two types: one when the sun is very active and gives rise to many flares and coronal mass ejections (CMEs) and other when the sun is very quiet and there is no X-ray flare for several days. Using data from the MWA, we have investigated a CME event and a quiet sun. We have been able to detect gyro-synchrotron emission from the CME and have successfully modelled the emission. Using the model, we have estimated different plasma parameters in a spatially resolved manner at different times. In this talk, I will discuss the details of the fitting procedure and how we succeeded in detecting the emission even after 2 hours after the initial eruption and at a height of ~4.7 solar radius. In the second part of my talk, I will focus on the coronal heating problem. I will give the first direct and robust observational evidence, to the best of our knowledge, that Hudson’s criterion is satisfied even in the case of quiet sun. Several other predictions of the nanoflare hypothesis are also found to be valid in this case. All these works have been possible with the automated high dynamic range imaging routine we have developed. I will also talk about this briefly. If time permits I will also briefly discuss the various other works which are happening in our group.

2019 March 6-7, 3rd Swiss SCOSTEP Workshop, World Radiation Center Davos

Current developments in Switzerland: fundamental solar physics, solar variability, Sun-Earth relations in proxies, observations, and model simulations, future (space) missions/observations.


2018 November 15-16, 23rd Solar Orbiter Science Working Team Meeting, FHNW Windisch

More than 50 scientists and engineers from allover Europe met in Windisch with representatives of the European Space Agency ESA to discuss updates on Solar Orbiter mission preparations.

More than 80 participants from the SKA organization, government agencies, universities and the Swiss industry participated at the 3rd Swiss SKA Days organized by EPFL and I4DS at the FHNW Brugg-Windisch Campus.

Artist’s impression of the SKA radio telescope at night.


More information

Journal Club 2020

September 8, Spectral Characteristics and Formation Height of Off-limb Flare Ribbons
August 25, Can the Superposition of Evaporative Flows Explain Broad Fe XXI Profiles during Solar Flares?
August 11, Loss-cone instability modulation due to a magnetohydrodynamic sausage mode oscillation in the solar corona
June 16, The Sun is less active than other solar-like stars
June 2, Relating Streamer Flows to Density and Magnetic Structures at the Parker Solar Probe 
May 19, Relating Streamer Flows to Density and Magnetic Structures at the Parker Solar Probe 
May 5, Density Fluctuations in the Solar Wind Based on Type III Radio Bursts Observed by Parker Solar Probe
April 21, Spectral signatures of chromospheric condensation in a major solar flare
April 7, Solar Flare Distributions: Lognormal Instead of Power Law?
March 24, Extreme Ultraviolet Observations and Analysis of Micro-Eruptions and their associated Coronal Waves
March 10, Hard X-Ray Observations of a Jet and Accelerated Electrons in the Corona
February 11, Observations of Jetlet-like Events at Edges of Solar Magnetic Network Lanes
January 28, STIX instrument paper
January 14, Dark Jets in Solar Coronal Holes

Papers discussed before 2020


December 17, Probing the energetic particle environment near the Sun

November 19, Characterizing Upward Lightning With and Without a Terrestrial Gamma Ray Flash

November 5, Search window of solar flare neutrinos

October 22, A basal contribution from p-modes to the Alfvénic wave flux in the Sun’s corona

October 8, Localized Microwave and EUV Bright Structures in an Eruptive Prominence

September 10, Visualizing Data using t-SNE

August 27, What Determines the X-Ray Intensity and Duration of a Solar Flare?

August 13, Triggering the Birth of New Cycle’s sunspots by solar tsunami

July 30, The development of lower-atmosphere turbulence early in a solar flare

July 16, Constraints on energy release in solar flares from RHESSI and GOES X-ray observations

July 2, Gamma ray emission from a behind-the-limb-flare

June 18, Predicting solar flares using machine learning

June 4, On the Relative Brightness of Coronal Holes at Low Frequencies 

May 21, Propagation of Interplanetary Coronal Mass Ejections: The Drag-Based Model

May 4, Determination of the Total Accelerated Electron Rate and Power Using Solar Flare Hard X-Ray Spectra

April 7, Determination of the Total Accelerated Electron Rate and Power Using Solar Flare Hard X-Ray Spectra

April 2, Three-dimensional reconstruction of CME-driven shock-streamer interaction from radio and EUV observations

March 26, Micro Flares and their HXR and Microwave Emissions

February 12, Mapping the magnetic field of flare coronal loops

February 26, The Formation of IRIS Diagnostics

February 12, Frequency rising sub-THz emission from solar flare ribbons

January 29, Statistical Study of Chromospheric Evaporation in Impulsive Phase of Solar Flares

January 15, Solar Physics with the Square Kilometer Array


December 18, Life Versus Dark Energy: How An Advanced Civilization Could Resist the Accelerating Expansion of the Universe

December 4, Finding Flares in Kepler Data Using Machine-Learning Tools

November 20, Topological model of the anemone microflares in the solar chromosphere

November 6, How Nanoflares Produce Kinetic Waves, Nano-Type III Radio Bursts, and Non-Thermal Electrons in the Solar Wind

October 23, Electron Time-of-Flight Distances and Flare Loop Geometries Compared from CGRO and YOHKOH Observations

October 9, Statistics of Coronal Dimmings Associated with Coronal Mass Ejections. I. Characteristic Dimming Properties and Flare Association

September 25, Presentation by Rohit Sharma about his PHD work

September 11, Noise-Storm Continua: Power Estimates for Electron Acceleration

August 14, Presentation by Matej Kuhar about his PHD work

August 7, Presentation by Säm Krucker about his recent work in Japan

July 31, Continuum Enhancements in the Ultraviolet, the Visible and the Infrared during the X1 Flare on 2014 March 29

July 17, Radiative backwarming in white-light flares

June 6, Global conditions in the solar corona from 2010 to 2017

May 22, Solar Flare Prediction Using SDO/HMI Vector Magnetic Field Data with a Machine-learning Algorithm

May 8, Slipping Magnetic Reconnection during an X-class Solar Flare Observed by SDO/AIA

April 24, About the first observations of solar flares: Carrington, Hodgeson

March 27, Alfvénic waves with sufficient energy to power the quiet solar corona and fast solar wind

March 13, Photospheric observations of surface and body modes in solar magnetic pores

Talks & Public Engagement

2020 January 24, Science Café mit Säm Krucker, Raumschiff – Werkstatt für Astronomie, Dübendorf

2019 July 18, Vortrag und Virtual Reality-Erlebnis im Raumschiff: André Csillaghy stellte einer Männervereinigung die Sonnenforschung an der FHNW und das Röntgenteleskop STIX vor. Danach probierten alle die von FHNW-Studierenden entwickelte VR-App ‘Floating in Space’ aus.

2019 April 9, FHNW Technik Transfer Transparent: SMILE – Eine chinesisch-europäische Raumfahrtmission mit FHNW Beteiligung. Vortrag von Samuel Krucker (I4DS) und Matthias Fankhauser (IPPE) über das neue Projekt. Die Folien sind auf der SMILE-SXI-Projektseite zugänglich.

2019 March 2-3, Swiss Solar Activities at the Science Museum London: Explosiv oder ruhig? Die Schweizer Sonnenphysik a, ‘The Sun Family Festival’ mit einem interaktiven Stand um das am I4DS entwickelte App heliotime.org für helioviewer.org. Für die Schweizer Botschaft anlässlich der Sonderausstellung The Sun – Living with our Star 

2019 February 14, Neubad Lecture Luzern: Schwarze Löcher: über untote Sterne, die ihre lebendigen Artgenossen essen, die Raumzeit krümmen und über die Rolle, die sie in unserer Galaxie und im Universum spielen, mit Cédric Huwyler

2018 November 28, Swiss Solar Activities at Science Museum London Lates: Explosiv oder ruhig? Die Schweizer Sonnenphysik an der Late Night mit einem interaktiven Stand um das am I4DS entwickelte App heliotime.org für helioviewer.org. Für die Schweizer Botschaft anlässlich der Sonderausstellung The Sun – Living with our Star  

2018 November 22, Space Talks @EG-Bar: Die Geheimnisse des dunklen Universums und die ESA Mission Euclid, mit André Csillaghy

2018 November 15, SATW TecNight Frauenfeld, Vortrag: Wie wird das Weltraumwetter morgen? Exponat: Science on a Table

2018 November 1, Space Talks @EG-Bar: Weltraumwetter und die ESA Mission Solar Orbiter, mit Marina Battaglia


2018 October 30, Invited Talk @I4DS: Power Coders – the Coding Academy for Refugees

STEAM Activities and Workshops

2020 March, June Astronomiekurs für Kinder: Der geheime Schlüssel zum Universum, 2. Teil
2020 Jan 18-19, Talks and workshops at Kindermuseum Baden: Meine Sonne – ein leuchtender Stern
2019 Nov-March, Familienworkshops: The active Sun
2019 Oct 11, Workshop für Kinderkrippe: Der Bär sieht mehr
2019 Sept 1, Flick the World: Mach eine leuchtende Sonne / Solar flare alert system
2019 Summer, Workshops: Build your own telescope like the FHNW-pros of the X-ray telescope STIX
2019 March-April, Astronomiekurs für Kinder: Der geheime Schlüssel zum Universum, 1. Teil
2019 Jan 24, Workshop im Naturama: Sind diese Farben echt? Astronomiebilder machen
2018 October 9-12, Tüftelcamp
2012-2018 April, July Ferienplausch