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. 2018 Jun 27;126(6):067008. doi: 10.1289/EHP2663

Figure 2.

Figure 2A is a map marking the Utica Shale, Marcellus Shale, and the areas that overlap. Figure 2B is a map of the posterior mean spatial random effects from SGLMM overlaying the Utica and Marcellus Shale locations. Figure 2C is a map of the posterior mean spatial random effects from Sparse SGLMM overlaying the Utica and Marcellus Shale locations.

Utica Shale, Marcellus Shale, and their (A) overlapping areas in Ohio; (B) posterior mean spatial random effects (magnitude and direction indicated by color gradation) from SGLMM; and (C) posterior mean spatial random effects (magnitude and direction indicated by color gradation) from Sparse SGLMM. Large positive random effect values represent elevated risk of CII injection well after adjustment for the considered predictors, whereas large negative values indicate the opposite. Images represent random effects from models of presence/absence of a CII injection well within a block group (dependent variable) against the following independent predictor variables: UNG wells, median age, % ≥high school educated, % white only, % voter turnout, population density, and water area.