gov.noaa.ngdc.stp.solar:G005341919Solar Prominences and Filaments appear as dark filamentary objects on the solar disk (filaments) and as protuberances on the edge of the solar disk (prominences). They generally sit above magnetic neutral lines, outlining the demarcation of negative and positive magnetic fields on the Sun's surface. They are viewed in the H-alpha and the Calcium K lines in the solar chromosphere. Occasionally they blow off the surface of the Sun and can cause space weather effects on Earth if their paths intersect. Meudon Solar Observatory has kept a record of sudden disappearances of solar filaments for many years, publishing extensive lists in the Cartes Synoptiques de la Chromosphere Solaire. During the International Geophysical Years (IGY 1957-1959) an international effort to observe these disk phenomena routinely in a standard format began. This effort continues today.To provide long-term scientific data stewardship for the Nation's geophysical data, ensuring quality, integrity, and accessibility.19190301UnknownUnknownIn workasNeededNASA/Global Change Master Directory (GCMD) Earth Science KeywordsEarth Science > Sun-earth Interactions > Solar Activity > Solar FilamentsEarth Science > Sun-earth Interactions > Solar Activity > Solar ProminencesUncontrolled KeywordsSolar PhysicsH-AlphaPatrol FilmScout FilmNASA/GCMD Location KeywordsSpace > Solar Region > CoronaSpace > Solar Region > ChromosphereSpace > Solar Region > PhotosphereRestriction Code: otherRestrictions; DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of CommerceSolar Data Managerphysical and mailing NOAA/NESDIS/NGDC E/GC2 325 Broadway BoulderCO80305303.497.6133 or 303.497.6323solar.ngdc@noaa.govUnknown 20111117Solar Data ManagerDOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commercemailing and physical NOAA/NESDIS/NGDC E/GC2 325 Broadway BoulderCO80305303.497.6133 or 303.497.6323solar.ngdc@noaa.govContent Standard for Digital Geospatial Metadata: Extensions for Remote Sensing MetadataFGDC-STD-012-2002