text: Yes, there should be a weak connection between phases of the moon and earthquakes or volcanoes.  Both earthquakes and emerging volcanoes depend on growing stress within the earth.  The moon can raise tides both in the crust of the earth and the oceans, affecting weight of water over portions of the earth.  The moon tide can serve as the straw that breaks the camel's back causing an event to happen slightly sooner than it would anyway.  Of course phases of the moon deal with the reflection of the sun's light relative to the positions of the sun, moon and earth.  Because the ocean tides (and crustal tides) also depend on these same positions where the sun either works with or against the moon), the phase of the moon can slightly affect the weight of the straw that breaks the camel's back.