Jul 12 – 23, 2021
Europe/Berlin timezone

A study on the cosmic ray intensity variation using scintillation counters for air shower observation.

Jul 15, 2021, 12:00 PM
1h 30m


Poster SH | Solar & Heliospheric Discussion


Toshiyuki Nonaka (Institute for Cosmic Ray Research , University of Tokyo)


We report a study on the conversion of a giant cosmic ray observatory for air shower observation to observe cosmic ray intensity variations caused by solar activity, anisotropy associated with interplanetary disturbances, and detection of sudden cosmic ray events on the earth's surface. In this report, we use data from the surface detectors operated by the Telescope Array experiment located at 39^{\circ}N, 112^{\circ}W (total detector area: 2250 m^{2}). In order to evaluate the cosmic ray intensity variations, we will compare the data with some of the corrections considered and with available world wide database such as Nagoya Muon detector and other observatories that have been in stable operation at different geographic longitudes. Finally, we will report on the intensity variations due to weather and solar activity recorded during the observation period.


Modulation, Forbush decrease, Air shower, Intensity variation

Subcategory Experimental Methods & Instrumentation
other Collaboration GRAPES-3
Collaboration Telescope Array

Primary authors

Dr Akitoshi Oshima (Astronmy Observatory, Chubu University) Dr Katsuya Yamazaki (Chubu university) Toshiyuki Nonaka (Institute for Cosmic Ray Research , University of Tokyo)


Presentation materials