what tool do scientist use to measure earthquake?

measuring tools that scientist use to measure an earthquake

Now a days the scientists are using broad band seismograph .That will record the arrival time of different waves and the maximum amplitude of each wave. These datas are required to calculate the Richter scale. For measuring in Marcalli more meaning full scale we do not need any measuring instrument.Only the news paper report what people felt at the time of earthquakes are used to decide this scale.

Brainy birds can use tools

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