GEOLOGY

Detailed explanation-1: -In order to determine the location of an earthquake epicenter, seismographs from at least three different places are needed for a particular event.

Detailed explanation-2: -You need one because the epicenter will be somewhere along that circle. You need three because three is the minimum number of circles that will intersect at one point. It’s not possible to do this with only seismic data.

Detailed explanation-3: -Seismic stations detect earthquakes by the tracings made on seismographs. Tracings made at three separate seismic stations are needed to locate an earthquake epicenter. Objective: To identify the location of an earthquake epicenter using a travel time graph and three seismograph tracings.

Detailed explanation-4: –You need a minimum of three seismograph stations to locate the epicenter of an earthquake using a travel-time graph.-Determining the location of the epicenter is sometimes referred to as “triangulation."

Detailed explanation-5: -Modern seismometers include three (3) elements to determine the simultaneous movement in three (3) directions: up-down, north-south, and east-west. Each direction of movement gives information about the earthquake.