Solar flare activity - Evidence for large-scale changes in the past

Details Solar flare activity - Evidence for large-scale changes in the past Solar flare activity - Evidence for large-scale changes in the past

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977icar...32..106z&link_type=abstract

Icarus, vol. 32, Sept. 1977, p. 106-126.

Physics

8

Lunar Rocks, Meteorite Collisions, Particle Tracks, Solar Flares, Abundance, Lunar Dust, Lunar Soil, Lunar Surface, Meteorite Craters, Penetration

Scientific paper

An analysis of radar and photographic meteor data and of spacecraft meteoroid-penetration data indicates that there probably has not been a large increase in meteoroid impact rates in the last 10,000 yr. The solar-flare tracks observed in the glass linings of meteoroid impact pits on lunar rock 15205 are therefore reanalyzed assuming a meteoroid flux that is constant in time. Based on this assumption, the data suggest that the production rate of Fe-group solar-flare tracks may have varied by as much as a factor of 50 on a time scale of about 10,000 yr. No independently obtained data are known to require conflict with this interpretation. Confidence in this conclusion is somewhat qualified by the experimental and analytical uncertainties involved, but the conclusion nevertheless remains the present 'best' explanation for the observed data trends.

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