GLE Alert Plus

Solar Particle Events (SEPs) are a manifestation of violent energy release processes occurring at the solar atmosphere, such as solar flares (SFs) and coronal mass ejections (CMEs). Neutron monitors record secondary cosmic rays created by interactions of 500 MeV primary cosmic rays with the Earth's atmosphere. Large SEPs are being registered at the Earth by ground based recorders as Ground Level Enhancements (GLEs). The propagation of the extreme and hazardous SEPs, from the Sun to the Earth depends on the energy. Due to the fact that neutron monitors record only particles of the highest energies (> 500 MeV) it is evident that NMs will register extreme SEPs (GLEs) rather promptly. Therefore GLE observations by NMs makes it possible to establish a warning signal on the arrival of lower and mid energy charged particles. The physical concept of the GLE Alert Plus software is based on the idea that the early detection of an Earth-directed cosmic ray event by NMs gives a good chance of preventive monitoring SEP-flux rise, providing an Alert with a very low probability of false alarm.
GLE Alert Plus system is develped by ISNet. It uses Neutron Monitor Data from NMDB and is supported by National and Kapodistrian University of Athens (NKUA) and European Space Agency (ESA).

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