Ips-gle-alert -- Ground Level Event Alert
About Ips-gle-alert	English (USA)
A Neutron Monitor is operated by the Australian Antarctic Program at its Mawson Antarctic base.Data from this instrument is a count of neutrons which are produced indirectly from Cosmic Rays, which consist mostly of high energy protons. An increase in detector count rate is not due to galactic cosmic radiation, but to the addition of solar cosmic (high energy) radiation (solar cosmic rays) from a solar particle event (SPE), usually associated with a strong solar flare. The increase in the count rate may be from about 3 to 10,000%. The increase from ambient to peakcount rate may take only a few minutes (fast high energy event) to an hour or two (slow and usually lower energy event). The return of the count rate to galactic cosmic ray background may take anywhere from a few hours to a few days. SWS GLE Alerts are issued automatically by detection software when a count increase of 10% or more is observed and the solar xray flux is greater than M5. Alerts should be confirmed on the SWS website, under the Geophysical Section. Further information on AAD/SWS Cosmic Ray data can be found at: SWS WDC Cosmic Ray Data Background reading on Cosmic Rays is available at: SWS Educational Page - Cosmic Rays To see the collection of prior postings to the list, visit the Ips-gle-alert Archives.
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