Article: Investigators at United States Air Force publish new data on space research.

"Recent work based on nitrate abundances in polar ice cores has shown that large fluence solar energetic (E > 30 MeV) particle (LSEP) events during the spacecraft era of observations (1960-present) are diminished in comparison with those of sonic preceding eras detected in the ice cores dating back to 1561. McCracken et al. [McCracken, K.G., Dreschhoff, G.A.M., Smart, D.F., Shea, M.A," researchers in the United States report.

"A Study of the frequency of occurrence of large-fluence solar proton events and the strength of the interplanetary magnetic field. Sol. Phys., 224, 359-372, 2004] have reported in inverse correlation bcoxcen LSEP events and the magnitudes ...

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