ISWI Webinars

The ISWI Webinar committee organizes and  hosts virtual seminars on topics of interest to the community. The webinars are recorded and the playlist with the previous seminars, which will also include future sessions, can be accessed through the following links:

UN page with links: https://www.unoosa.org/oosa/en/ourwork/psa/bssi/iswi_webinars.html 

 

The next ISWI Seminar will be November 27, 2024

We are pleased to announce the next ISWI Webinar by Dr. Ilya Usoskin  scheduled for November 27, 2024 at 3 PM Central European Time (9 AM EST; 7:30 PM IST). This seminar will be the last of 2024.

To register for the virtual seminar, please send an email to: [email protected]. 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.

 

Title: Rare and dangerous extreme solar eruptive events: A new phenomenon

Speaker: Ilya Usoskin
University of Oulu

Abstract: 
Solar energetic eruptive processes, such as flares and coronal mass ejections, are relatively well-studied during the past decades of direct observations. Although their maximum strength/energy is not constrained by direct data because of a too short period of observations, we know that extreme events do occur rarely on the Sun over the past millennia. This is known from both the multi-millennial data of extreme solar activity using cosmogenic-proxy data, and also a several-year survey of thousands of sun-like stars made with high-precision stellar photometry. With the available data, we can estimate the occurrence probability of extreme solar events, reconstruct their energy spectra and assess the dramatic terrestrial and societal impacts. We can also discuss whether these events are Black Swans or Dragon Kings. The consistency of different datasets on the average flux of solar energetic particles near Earth can be also assessed.