Both periods are 47 years long. In the 47 years before Israel became a nation again, there were 112 great earthquakes in the world. It is not a significant increase though. There were a few more 7.00 to 7.99 earthquakes in the second half. Here we see an increase of nearly 3-fold.
Seismologists can detect earthquakes better now.
We've already seen that the 7.00 and above earthquakes did not change significantly between the first half and the second half of the 20th century. Each of these are 10 years long. Let's look at all earthquakes worldwide magnitude 6.00 and above. If anything, perhaps there is a decrease. The first ten years of the 1900's there were 41 such earthquakes.