Thank you for being so considerate.

I appreciate responses from intelligent people, and apologize for the first part of my last post, I was in a rush to leave for several appointments and was under the impression that the reply was from David F Mayer.

Error of observation; I'm pretty good at such things occasionally. I suppose that nobody is perfect.:-)

I did notice that the information was from "published" earthquakes, and you are right in that, if in the past some earthquakes occurred that were not "published", then the increase may be "apparent" rather than real.

That information then leaves me with the formidable task of obtaining the correct information, as you described.

Unfortunately, I may not be up to the task, there are other priorities that consume much of my time.

I still maintain that if the global atmospheric density decreases, (for whatever reason) then it will change the behavior of a variety of observable "natural" phenomenon such as storms, ozone layer, intensity of sunlight at the surface, and perhaps geologic events such as volcanoes and earthquakes.

I'd like to get your thoughts on such an assumption. In other words, what would happen if the atmospheric pressure/density would decrease significantly on a global scale.

You said:

You may want to look into what is called solar dimming. The original studies that lead to the theory were the observations that water is evaporating more slowly over the last few decades.

I have seen that report and (naturally) I have a hypothesis that explains why it is happening.

My extremely short and incomplete explanation goes like this:
In the beginning of this event, the Earth's average temperature is relatively constant for thousands of years, then man discovers atomic power, which he promptly spreads to the atmosphere and water, this extra (kinetic) energy heats the atmosphere and water, this heating causes the water and atmosphere to evaporate. The atmosphere "evaporates" into space and the water evaporates into the air.
The water that is on the ground is cooled by the action of evaporation so the water's evaporation rate decreases, at the same time the air has become less dense and colder in the upper atmosphere. The lower atmosphere now contains a large quantity of water vapor which absorbs sunlight, reducing the amount of sunlight falling on the surface. The secondary effect is that the atmosphere now is less dense as far as the original "air" molecules are concerned, causing the sunlight to create a sharper "shadow" on the surface of the planet as the planet rotates. The sharper shadow means that there is less twilight and that means that the daily "dose" of sunlight is smaller.

Now if it could be proven to be right or wrong.