https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.7 2026-04-15T10:53:30.610Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/a82d885e-34cd-496a-b34d-17a23ad04126 SOLAR ENERGETIC PARTICLE PROPERTIES Date=2024-09-23 User Id=tstevens Entity=Definition Operation=INSERT System Note=insert Definition New Value=id: null text: The properties of solar energetic particles, which are high-energy particles produced by the Sun. They can be emitted during solar flares or coronal mass ejections and can be a source of radiation that reaches the Earth. Events involving solar particles have varying occurrence times, magnitudes, durations, and compositions. The peak radiation lasts hours and can last anywhere from a few days to a week. Only a tiny percentage of directed solar flares and coronal mass ejections strike the Earth. Several operational problems with spacecraft may have been caused by certain key occurrences connected to previous solar cycles. language code: en The properties of solar energetic particles, which are high-energy particles produced by the Sun. They can be emitted during solar flares or coronal mass ejections and can be a source of radiation that reaches the Earth. Events involving solar particles have varying occurrence times, magnitudes, durations, and compositions. The peak radiation lasts hours and can last anywhere from a few days to a week. Only a tiny percentage of directed solar flares and coronal mass ejections strike the Earth. Several operational problems with spacecraft may have been caused by certain key occurrences connected to previous solar cycles. 2024-09-23 10:06:42.0