A wide range of effects are expected from future eruptions along the Mono-Inyo Craters. Ash and rock fragments (tephra) may accumulate to a thickness of near an erupting Mono-Inyo vent. Downwind accumulations of tephra may exceed at a distance of and at .: Winds in the area tend to blow toward an east or northeasterly direction more than 50 percent of the time, and toward any easterly direction more than 80 percent of the time.: Grain size and thickness of tephra generally decreases gradually with distance from a vent. Volcanic ash will likely contaminate air routes east of the vent.