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A couple. You need to find where the tremors are coming from, basically which graph has the strongest reading even when you move it's location.

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Q: How many seismographs needed to locate an earthquake?
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Related questions

How many seismographs are needed to detect an earthquake?

three


How many seismographs must be used to locate the epicenter of an earthquake?

Three sizemographs are needed to accuratley locate the earthquake's epicentre, the way to work it out is you draw three radi from the siesmographs to where the earthquake roughly is then you draw circles from that, the point where the three circles overlap is the epicentre.


How many stations are needed to locate the epicenter of an earthquake?

3


How many stations are needed to locate an earthquake?

3 stations


Where are seismographs located?

At many different earthquake centers. When an earthquake happens the tree nearest earthquake centers record the magnitude and intensity of the seismic waves produced by the earthquake in order to find the origin or epicenter


How many seismographs do you need to find an epicenter?

You would need at least three different seismometer locations to triangulate an earthquake's location.


What is earthquake precursors phenomena?

There are many probably earthquake precursors that could lead to useful predictions of when one will occur. Foreshocks are one way to predict when a quake is coming.


How many seismometer-station readings are needed to pinpoint the epicenter of an earthquake?

At least three.Please see the related question for an explanation as to why.A minimum of three seismograph or seismometer stations are required to locate the epicentre of an earthquake.


How many recordings do you need to locate the epicentre of an earthquake?

3


How many stations do you need to locate the epicenter of the earthquake?

Three


How many seismometer measurements are needed to determine an earthquake's epicenter?

Measurements from at least three different seismometer stations are required to locate an earthquakes epicentre. For more information see the related question.


How many people needed hospital treatment after the Haiti earthquake?

300,000 needed hospital treatment because they were injured