Originally Posted by Robbie

Good lord, Mark...your ignorance knows no bounds. NO, it's not man-made. Unreal that you think that humans can actually cause earthquakes.

There is this thing called "Google". You may have heard of it. And if you search for "frequency of earthquakes in las vegas" this is what you can find (or you could just keep spouting nonsense from MSNBC):

"The State of Nevada is located in ?earthquake country.? It lies within the Basin and Range Province, one of the most seismically active regions in the United States. Along with California and Alaska, Nevada ranks in the top three states subject to the most large earthquakes over the last 150 years.

Magnitude 3 and 4 earthquakes are commonly felt, but rarely cause damage. Minor to moderate damage can accompany a magnitude 5 or 6 event, and major damage commonly occurs from earthquakes of magnitude 7 and greater. Although earthquakes do not occur at regular intervals, the average frequency of earthquakes of magnitude 6 and greater in Nevada has been about one every ten years, while earthquakes of magnitude 7 and greater average once every 27 years.

Geologically young faults, which are the sources of earthquakes, can be found throughout the state. Although the largest historical earthquakes occurred some distance from population centers, no part of the state is far from a potential source of large earthquakes. Large earthquakes occurring along the borders of Nevada, such as the 1872 Owens Valley earthquake in California (magnitude 7¾?8), can also cause strong shaking and damage in Nevada. Large earthquakes have occurred in Nevada in the recent past and more will occur in the near future."