Real time GLE alert

According to NOAA Space Weather Scales (SWS) the dangerous Solar Radiation Storms are the following: S5-extreme (flux level of particles with energy > 10 MeV more than 105 cm-2sec-1), S4-severe (flux more than 104 cm-2sec-1), and S3-strong (flux more than 103 cm-2sec-1). The problem is how to forecast exactly these dangerous phenomena. It is shown that exact forecast can be made by using high-energy particles (few GeV/nucleon and higher) which transportation from the Sun is characterized by much bigger diffusion coefficient than for small and middle energy particles. Therefore high energy particles came from the Sun much more early (8-20 minutes after acceleration and escaping into solar wind) than main part of smaller energy particles caused dangerous situation for electronics (more than 30-60 minutes later). In the attached files principles and experience of automatically working program producing a signal ALERT on the basis of one-minute data of ground level neutron monitors about the start of great SEP event is described. The probabilities of false and missed alerts are also considered.