there is a sudden change in direction due to refraction. A surface wave travels along the surface of the Earth. It is the slowest of the three types of seismic wave. Surface waves usually have ...

The modern understanding of the plate tectonic cycle predicts that remnants of submerged plates will be found near subduction zones. However, a new high-resolution model shows that these remnants can ...

An international team of geophysicists says it has discovered evidence of a "lost world" hidden beneath the Western Pacific ...