Pressure from a pool of magma has just cracked solid rock, creating a volcano-tectonic (VT) event. This type of quake produces relatively high-frequency shaking, usually between one and five ...

An enormous plume of magma over a thousand miles across is slowly but steadily rising underneath Mars' Tharsis volcanic region and could one day provoke a mighty eruption from the solar system's ...

This is because when the magma moves, two types of activities can happen - either it forces its way along the cracks, or becomes a pool of melt. Minor tremors can happen in both cases. So ...