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about 2 to 4 minutes depending upon the magnitude

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What happens to earthquake magnitude as the length of the moving fault changes?

As the length of the slipped fault increases (all other factors being equal), so too does the magnitude of the earthquake.


What is the length of the 1970 earthquake in Peru?

45 seconds


What is the magnitude length and damage of China's 1927 earthquake?

The magnitude of the 1923 Tokyo earthquake was 7.9 on the Richter scale. Length of quake: 4-10 minutes. Overall, estimated damage included the loss of 570,000 residences and a cost in excess of one billion U.S. dollars in today's figures. There were 105,000 confirmed deaths, and another 40,000 or so who went missing.


The earthquake which struck Haiti was recorded as magnitude 7.0 what does this mean?

Magnitude is a term used to describe how much energy was released by an earthquake. It gives an indication of the amplitude of the seismic waves that occur and also on the length of the fault rupture zone and the displacement along the fault. A magnitude 7 earthquake is defined by the US Geological Survey as a "major" earthquake. In general earthquake over a magnitude of 4 or 5 can cause damage although the exact reasons why some earthquake are more damaging than others is more complext than just the absolute magnitdue of the earthquake. For more information on this, see the related question.


How has the world's orbit changed since the 8.9 magnitude earthquake and the tsunamis?

No, earth's orbit around the sun did not change as result of the earthquake/ Tsunami in Japan, which was actually updated to a magnitude 9.0 earthquake. The length of a day, though, did change, and it changed by 1.8 millionths of a second. For earth's orbit to change, something would have to hit earth from outer space.