Criteria for alerts

Solar flare
Issue When the M class or greater LDE flare occurs (for over 30 minutes)
Issue When the X class LDE flare occurs
Issue When a solar flare with optical importance 3 or more (3F, 3N, 3B, 4F, 4N, 4B) occurs
Coronal Mass Ejection(CME)
Issue When the FULL HALO CME (CME from the Sun Surface to all directions) is observed
* Only if the CME associated with the large-scale flare which makes alert to be issued is generated
Geomagnetic disturbance
Issue When there is a report of a geomagnetic storm from Kakioka
Cancel When the geomagnetic storm is terminated
Solar Proton
Issue When the proton flux (≧10MeV) observed by GOES is over 10 PFU
Issue When the proton flux (≧10MeV) observed by GOES is over 100 PFU
Issue When the proton flux (≧10MeV) observed by GOES is over 1000 PFU
Issue When the proton flux (≧10MeV) observed by GOES is over 10000 PFU
Cancel When the proton flux (≧10MeV) observed by GOES returns to less than 10 PFU
High energy electron
Issue When the 24-hour electron fluence (≧ 2 MeV) observed by GOES is over 3.8 x 108 [/cm2 sr]
Issue When the 24-hour electron fluence (≧ 2 MeV) observed by GOES is over 3.8 x 109 [/cm2 sr]
Issue When the 24-hour electron fluence (≧ 2 MeV) observed by GOES returns to less than 1.9 x 109 [/cm2 sr]
Cancel When the 24-hour electron fluence (≧ 2 MeV) observed by GOES returns to less than 1.9 x 108 [/cm2 sr]