How do you locate the epicenter of an earthquake?

You need to find the difference between the arrival times of the P and S waves from three or more stations and compare the readings given to make a chart the point where all three places meet is the epicenter.
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Catac, dry land,and lizards

When a lake, river or other aquatic  system  becomes  eutrophic, it can have serious negative effects on other organisms like fish, birds and even people.if an algal bloom is so bad that it causes wide-spread death  in  the  water, the organisms that die will all sink to the bottom and start to decompose.