Columbia near 8 quake

A few days ago on the 10th of August there was a very large earthquake in Columbia, it was what I call a near 8. The earthquake was 7.4 on the rickter scale. When the strength of an earthquake approaches 8, it becomes so strong that it would topple the strongest buildings and trees effortlessly. Those earthquakes are so strong that they can push vast volumes of water away from the ocean floor causing a tsunami. Near 8 earthquakes are like the 8 ball on the pool table; when they sink a near 8, it is game over. If the earthquake power is close to 8 on the rickter scale then the damage is devastating, it is game over for towns and cities. 

There has now been about 3 earthquakes that I call near 8 this year. In June there was a strong earthquake in the Philippines, then the same month there was one in Venezuela, now there is one in Columbia. 

I have my own speculation to why there are more powerful earthquakes occuring, I think that there are more droughts, water helps to lubricate fault lines so they can slide past eachother, when there is a draught, the fault lines become more stiff and smaller earthquakes get stopped, they get condensed into much larger earthquakes. More energy is required to dislodge the rocks when they are very dry so more energy builds up. When there are stronger earthquakes, they can trigger more energetic quakes. This is just a speculation though, I don't know if it is a fact.