You want to participate in the International Cosmic Day? Great! This is how it works:

Measuring Cosmic Particles

  • Participating with your own detector:
    If you do not have a detector and want to join either QuarkNet for the U.S. or Netzwerk Teilchenwelt for Germany, contact the networks directly (for QuarkNet contact Mark Adams, for Germany astroteilchen(at) By joining the program of QuarkNet, you are eligible for a summer workshop. After you take a workshop, you can receive a detector for your classroom. 
  • Participate with data provided over the internet:
    Alternatively, if you don't have access to your own Cosmic Ray Detector, you can instead analyse publically-available data. We provide public data on the learning platform Cosmic@Web, along with background knowledge, description of the experiments and data sets, and how it can be interpreted. For more details, see the instruction (PDF, 2.2 MB). Also have a look at our contribution to the 36th International Cosmic Ray Conference (Cosmic@Web_ICRC2019_Poster.pdf (PDF, 11.8 MB)Cosmic@Web_ICRC2019_Proceeding.pdf (PDF, 290KB)). Work like a scientist with Cosmic@Web.

Team up with others

  • One main purpose of the ICD is to encourage collaborative work. You are supposed to work in groups and can only register as such.


Any group wishing to participate in ICD should register through the website listed under "Registration". Please note that by group we mean all students that come together in a common place and spend the day together. If more school groups are gathering together in a venue, this is considered one group. It is not important to distinguish the schools or institutions from which the participants come. We use the registration data to exchange important information for planning the day and to display the Google Map with all venues of the day. Only one organizer per venue should therefore register the group. The participating students are registered individually at the locations. No Indico account is required for registration. Only if you want to change your registration later, it is necessary to have one. The registration for this year's ICD is already open.

Plan your day
We organize the communication between the different groups, but not the individual participants. When registered you will receive a customisable poster to announce your event and more informations about planning the day.