In general, the earthquake hypocenters for each swarm are clustered together. The swarm in the NW corner of the map seems to be significantly more shallow than the swarm to the south. It does not appear that the earthquakes in any swarm are becoming more shallow with time, which could indicate magma moving towards the surface which could be a precursor to an eruption. When manipulating the 3D Hypocentral depth it seems (from some angles) that the hypocenters line up parallel to the surface with higher numbers of earthquakes at depths of 5 and 10 km. This is probably an artifact caused by processing or by parameters set for earthquake locations.