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This is not a record of a Magnitude 8 or Greater Earthquake during the year
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The answer would be false. What is clearly unpredictable is the magnitude of any given earthquake.
Small earthquakes can happen almost anywhere on the earth's surface, however major earthquakes mainly only occur at plate boundaries or along very large faults. Earthquakes can also happen around volcanoes especially when they are due to erupt.
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Most earthquakes happen in the Pacific Ocean's 'ring of fire'. This is where several tectonic plates rub up against each other thus causing the quakes.
Yes, earthquakes and tremors did happen back then, possibly even more frequently than they do today. When the dinosaurs first started out, the world was one large ocean (the Tethys) and one large continent. (Pangaea) At the end of the cretaceous, when they died out, the major landmass had split into seven major landmasses or, in the case of North America and Europe, groups of islands. The events that made this happen; tectonic movement or earthquakes.
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In the world there are approximately 53,139 earthquakes per year of magnitude 3.0 or greater which equates to an average of 145.6 per day. Major earthquakes of 6.0 or greater happen at the rate of 1 every 2.5 days.
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Three Largest/Major Earthquakes (By Magnitude)1960 Valdivia Earthquake (Magnitude: 9.5)2004 Indian Ocean Earthquake (Magnitude: 9.3)1952 Kamchatka Earthquake (Magnitude: 9.2)Source:http://en.wikipedia.org/wiki/List_of_earthquakes#Largest_earthquakes_by_magnitude
True! The small magnitude earthquakes that sometimes precede a major earthquake are known as fore shocks.
There were two major earthquakes recorded for Japan in 2007. The first was a magnitude 6.7 resulting in 1 fatality on March 25. The second was a magnitude 6.6 resulting in nine deaths on July 16. Both occurred near the west coast of Honshu, Japan.
A magnitude 7 releases about 1000 times more energy than a magnitude 5, so therefore you need 1000 magnitude 5 earthquakes to release the same energy as 1 magnitude 7.
Earthquakes with a magnitude greater than or equal to 6 are termed strong earthquakes. 7 or larger are termed major earthquakes. Earthquakes greater than or equal to 8 are termed great earthquakes. The term "large" is not actually used.However based on the above it could be argued that any earthquake with a magnitude greater than 6 is a large earthquake.
Around 100-150 earthquakes are recorded every year in the UK. About 15% of these are reported felt. On average an earthquake of magnitude 4.7 or larger occurs every 8 years, while a magnitude 5.0 or larger occurs every 18 years.
I have been doing some maths and found that in the average year, you'd get about 3,610,364(3 million, 6hundred and 10 thousand, 3hundred and sixty four) earthquakes in a year. Ofcourse these are all around the globe. About 2 million of these are bellow 2 on the Richter scale.
We do not know. Earthquakes are not predictable.
Yes, sometimes there will also be a tsunami!