a fold
epicenter
The focus (more correctly termed the hypocenter) of an earthquake is the point in the earth where the earthquake rupture or fault movement actually occurred. The point on the surface directly above the hypocenter is known as the epicenter.
Because earthquakes rupture sections of a fault, sometimes for hundreds of miles. So it is possible for there to be just as much destruction anywhere along the fault as there is at the epicenter. (the epicenter being at the beginning of the rupture)
My (Penguin) geological dictionary lacks this. But compression is a geophysical force which causes buckling or bending or displacement of a structure, or consolidation of a material (as in metamorphic).[My local mountain topography is moving about 40mm per year in a SW direction, and abuts the NZ Alpine Fault which is moving NE about 10mm per year. The SW movement is mainly taken up by plastic buckling of the landscape, but eventually there will be catastrophic movement along the Alpine Fault, which has not moved significantly in some 250 tears. In the first photo of Alpine Fault in Wikipedia, you can clearly see some folded mountains. ]
The epicenter is the point on the Earth's surface directly above the hypocenter (100's of miles), the hypocenter is where movement first occurs in the fault, and the epicenter is where we feel the quake (when it's its strongest).
a fault
epicenter
The focus (more correctly termed the hypocenter) of an earthquake is the point in the earth where the earthquake rupture or fault movement actually occurred. The point on the surface directly above the hypocenter is known as the epicenter.
Because earthquakes rupture sections of a fault, sometimes for hundreds of miles. So it is possible for there to be just as much destruction anywhere along the fault as there is at the epicenter. (the epicenter being at the beginning of the rupture)
epicenter
epicenter.
Earth is looser at the fault lines.
My (Penguin) geological dictionary lacks this. But compression is a geophysical force which causes buckling or bending or displacement of a structure, or consolidation of a material (as in metamorphic).[My local mountain topography is moving about 40mm per year in a SW direction, and abuts the NZ Alpine Fault which is moving NE about 10mm per year. The SW movement is mainly taken up by plastic buckling of the landscape, but eventually there will be catastrophic movement along the Alpine Fault, which has not moved significantly in some 250 tears. In the first photo of Alpine Fault in Wikipedia, you can clearly see some folded mountains. ]
The epicenter is the point on the Earth's surface directly above the hypocenter (100's of miles), the hypocenter is where movement first occurs in the fault, and the epicenter is where we feel the quake (when it's its strongest).
bending of the rocks followed by slipping...
where the fault is at or the epicenter which is not where the earthquake starts it is the focus where the earthquake starts
the epicentre is the point directly above the focus.