Speaker
Description
The variations in cosmic-ray intensity, measured by ground-based detectors at various latitudes, longitudes, and altitudes, are associated with disturbances in the interplanetary magnetic field near Earth. When these variations interact with the magnetosphere, they cause worldwide Forbush decreases (FD), followed by a gradual recovery. The extent of the flux depletion depends on the type and energy of the detected particles, which are influenced by geographical coordinates, the detector’s energy threshold, and selective power. The SEVAN particle detector network, with nodes in Europe and Armenia, identifies three types of particles that exhibit coherent depletion and recovery, corresponding to different energy galactic protons interacting with disturbed magnetospheric plasmas.
We present measurements of these FDs performed at mountain altitudes in Aragats (Armenia), Lomnicky Stit (Slovakia), Mileshovka (Czechia), and DESY (Hamburg, Germany) at sea level. We compared FD measurements made by the SEVAN detector and neutron monitors.
