International Cosmic Ray Conference 2021



ICRC Closing Session

Follow the Closing Ceremony of the 37th ICRC live:  Friday, 23 July, 18:00 (Berlin time) on Youtube:


ICRC Opening Ceremony

Follow the Opening Ceremony of the 37th ICRC live:  Monday, 12 July, 13:30 (Berlin time) on Youtube


Conference Platform is Open

Our conference platform (ViMP) has opened.

Please upload the conference materials for your contributions before  - PROLONGED - 7 July 2021 23:59 (Berlin time).  Without uploaded materials in time, the convener cannot prepare the discussion session with your contribution.

The upload of your proceedings article to the PoS website is open as well. You have received a separate e-mail from PoS with further info.

Registration Deadline

We will close our registration on 10 July 23:59 (Berlin Time) to make sure you have access to the conference platform on the beginning of the conference. Late Registration


For the ICRC 2021, a total of 1380 contributions (693 talks and 687 posters) have been accepted by the International Science Program Committee.
The contributions can be viewed here.


Celebrate Diversity

Celebrate the diversity of thought and experience held within our vast, international community through an interactive video project. Interactive means: We need your help! If you can spare just 10 minutes of your time to participate, we would really appreciate it! *Everyone* is encouraged to participate in the project - all genders, ethnicities, ages, abilities are welcome! You can find more information on the ICRC website:

Video Submissions are due by July 12th.


It is a great pleasure to announce the 37th International Cosmic Ray Conference that will take place in July 2021. The ICRC Conference Series has been organised biennially since 1947 under the auspices of the International Union of Pure and Applied Physics (IUPAP) and is the largest conference on Astroparticle Physics, bringing together the different topics of the field. The main topics are Cosmic Ray Physics, Gamma-Ray Astronomy, Neutrino Astronomy & Neutrino Physics, Dark Matter Physics and Solar and Heliospheric Physics. Additional new topics in the 2021 conference are Multi-messenger Astronomy and Outreach & Education. Broad reviews and recent scientific results, related theory and modelling, experimental methods, techniques and instrumentation will be presented. The ICRC 2021 will be a prime forum to learn about news and developments in Astroparticle Physics and to appreciate the links between its topics. The conference is jointly organised by the Local Organising Committee (LOC) with representatives of DESY and other German research labs and universities active in Astroparticle Physics, an independent International Scientific Program Committee (ISPC) and the IUPAP Commission C4 (Astroparticle Physics) as International Advisory Committee (IAC). Due to the COVID-19 pandemic, the ICRC is organised as an Online conference. We are looking forward to welcome you at the 37th ICRC.
Yours Sincerely,
Johannes Knapp Chair of the Local Organising Committee

Sponsors & Local Organisation

Logos Participants