ISWI Seminar: Origins of space weather phenomena at the Sun: additional constraints from multi-spacecraft observations and the Solar Orbiter mission.


We are pleased to announce the next International Space Weather Initiative (ISWI) Seminar by Dr Miho Janvier scheduled for October 25th at 3 PM Central European Time (9 AM EDT; 6:30 PM IST).

To register for this virtual seminar, please send an email to: Please include “ISWI Seminar Registration” in the subject line. There is a limit of 300 participants, so please register your interest as soon as possible. The MS Teams link will be sent to registered participants 2 days before the event.

Seminars will be recorded. Please visit the youtube channel of the United Nations Office for Outer Space Affairs where the recording of the previous seminars are available. The playlist which will also include future sessions can be accessed through the following link:

Title: Origins of space weather phenomena at the Sun: additional constraints from multi-spacecraft observations and the Solar Orbiter mission.

Speaker: Dr Miho Janvier

Abstract: The Sun’s atmosphere is the place where the most energetic events in our solar system take place. From solar flares to eruptions and injection of solar material of all sorts (jets, CMEs, particle acceleration), our star’s activity shapes the ever-changing conditions of the heliosphere. While these space weather events originate at the Sun, their origins are varied: from active regions to coronal holes, to more quiescent regions of the Sun (e.g. polar crown prominences, stealth CMEs). This variety makes understanding the succession of processes leading to these events difficult. Over the past decades, ground and space solar observatories and the variety of observations available (from imaging to plasma and particle diagnostics and magnetic field measurements) have helped us refine models of energy build-up and release.
In the present talk, I will review some of the key aspects that have helped us develop models of space weather inducing events such as eruptive flares and CMEs, and remaining questions that still need to be addressed. I will also show how recent observations from spacecraft and ground-based observatories provide an unprecedented wealth of data that help us in understanding these phenomena. Finally, I will overview how the Solar Orbiter mission observing programs can help, especially in coordination with other infrastructures, to tackle the challenges of linking the origins of space weather to its effect in the heliosphere.


Tuesday, October 25, 2022 - 15:00 to 17:00

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