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Data from the past 100 years suggests that the number of earthquakes per year arranged by magnitude is:

Magnitude : Average Number Annually

8 and higher:1

7 - 7 : 9 to 15

6 - 6.9 : 134

5 - 5.9 : 1319

4 - 4.9 : 13,000

3 - 3.9 : 130,000

2 - 2.9 : 1,300,000

The total number is therefore around 1, 500, 000 a year. Given that the Earth is about 4.5 billion years old and solid enough for earthquakes for about 4 billion of that number, the total number of earthquakes in the Earth's history would be about 6x1015 or 6,000 trillion.

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Christchurch, New Zealand has experienced significant earthquakes in the past, particularly the devastating earthquake in 2011. However, seismic activity has decreased since then, and the city is not currently as prone to frequent earthquakes as it was in the aftermath of the 2011 event.


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Earthquakes have been occurring for millions of years due to the movement of tectonic plates in the Earth's crust. The specific start date of earthquakes cannot be pinpointed as they have been a natural occurrence throughout geological history.


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