the point where the earthquake started, also called focus Hypocenter depths are typically 30 km and less for shallow earthquakes, several hundreds of kilometers for earthquakes occurring in subduction zones Most earthquakes in Fennoscandia originate at depths between 10 and 30 km
Also known as the focus, the hypocenter is the point of origin of an earthquake It can be expressed with no fewer than three measurements: latitude, longitude, and depth
The point within the earth where an earthquake rupture starts Also commonly termed the focus
The spot below the surface where the earthquake rupture starts: the point located by analyzing the arrival times of first motions at a group of stations It lies directly below the epicenter, which is the surface location mapped for the eq