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Herein the transient lunar phenomena (TLP) report database is subjected to adiscriminating statistical filter robust against sites of spurious reports, andproduces a restricted sample that may be largely reliable. This subset ishighly correlated geographically with the catalog of outgassing events seen bythe Apollo 15, 16 and Lunar Prospector alpha-particle spectrometers forepisodic Rn-222 gas release. Both this robust TLP sample and even the larger,unfiltered sample are highly correlated with the boundary between mare andhighlands, as are both deep and shallow moonquakes, as well as Po-210, along-lived product of Rn-222 decay and a further tracer of outgassing. Thisoffers another significant correlation relating TLPs and outgassing, and maytie some of this activity to sagging mare basalt plains (perhaps mascons).Additionally, low-level but likely significant TLP activity is connected torecent, major impact craters (while moonquakes are not), which may indicate theeffects of cracks caused by the impacts, or perhaps avalanches, allowingrelease of gas. The majority of TLP (and Rn-222) activity, however, is confinedto one site that produced much of the basalt in the Procellarum Terrane, and itseems plausible that this TLP activity may be tied to residual outgassing fromthe formerly largest volcanic ffusion sites from the deep lunar interior. Withthe coming in the next few years of robotic spacecraft followed by humanexploration, the study of TLPs and outgassing is both promising and imperiled.We will have an unprecedented pportunity to study lunar outgassing, but willalso deal with a greater burden of anthropogenic lunar gas than ever produced.There is a pressing need to study lunar atmosphere and its sources while stillpristine. [Abstract abridged.]

Lunar Outgassing, Transient Phenomena and The Return to The Moon, I: Existing Data