EARTH SCIENCE
EARTHQUAKES
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[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Detailed explanation-1: -Total 3 seismograph stations are used to locate the epicentre of an earthquake of all directions.
Detailed explanation-2: -Seismic stations detect earthquakes by the tracings made on seismographs. Tracings made at three separate seismic stations are needed to locate an earthquake epicenter.
Detailed explanation-3: -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-4: -Locating an Epicenter A seismograph measures seismic waves. Three seismograph stations are needed to determine the location of an epicenter. 1.
Detailed explanation-5: -Finding the Epicenter This is where the compass, the map, and the other seismograph records come in. The point where the three circles intersect is the epicenter of the earthquake. This technique is called “trilateration.” (Image from IRIS.)