<Ul> <Li> Foreshock </Li> <Li> Aftershock </Li> </Ul> <Li> <Ul> <Li> Blind thrust </Li> <Li> Doublet </Li> </Ul> </Li> <Ul> <Li> Blind thrust </Li> <Li> Doublet </Li> </Ul> <Li> <Ul> <Li> Interplate </Li> <Li> Intraplate </Li> </Ul> </Li>

The focus of an earthquake is the point on the surface located directly above the epicenter