It is no secret that Mammoth Lake and the caldera of Yellowstone are warming up. There is a fault line running from the approximate San Diego/LA area, up into the Sierras, and this is liable to rupture rather violently during one of the quakes that precedes the pole shift by some months. Volcanic eruptions from that area in the Sierras can be expected. The fault line we were referring to was the Owens Valley Fault line, which runs along a granite rock strata on up into the Sierras and down into the fractured mess of fault lines that is the LA to San Diego area. Where there are quakes aplenty in the Sierra Nevada range, which is rigid and not likely to adjust. The soft rock to the east of the Sierra range does make adjustments under pressure the diagonal pull stress peculiar to the N American Plate. This is why the Sierras are mountains, and Owens Valley a void. It allowed movement.
ZetaTalk September, 2010