There will be great earthquakes

“There will be great earthquakes” (Luke 21:11)
It is true that there were major quakes in centuries past; furthermore, with their sensitive equipment scientists now detect more than a million quakes a year. But no special instruments are needed for people to know when there is a great earthquake.
With data obtained from the National Geophysical Data Center in Boulder, Colorado, supplemented by a number of standard reference works, a tabulation was made in 1984 that included only earthquakes that measured 7.5 or more on the Richter scale, or that resulted in destruction of five million dollars (U.S.) or more in property, or that caused 100 or more deaths. It was calculated that there had been 856 of such earthquakes during the 2,000 years before 1914. The same tabulation showed that in just 69 years following 1914 there were 605 of such quakes. That means that, in comparison with the previous 2,000 years, the average per year has been 20 times as great since 1914.