8.8 magnitude earthquake in Chile compared to largest earthquake in Arizona

The United States Geological Survey has up to the minute accurate information on the huge Chilean earthquake. A summary of the earthquake information is here. To quote the USGS summary:

This earthquake occurred at the boundary between the Nazca and South American tectonic plates. The two plates are converging at a rate of 80 mm per year. The earthquake occurred as thrust-faulting on the interface between the two plates, with the Nazca plate moving down and landward below the South American plate.

Coastal Chile has a history of very large earthquakes. Since 1973, there have been 13 events of magnitude 7.0 or greater. The February 27 shock originated about 230 km north of the source region of the magnitude 9.5 earthquake of May, 1960 – the largest earthquake worldwide in the last 200 years or more. This giant earthquake spawned a tsunami that engulfed the Pacific Ocean. An estimated 1600 lives were lost to the 1960 earthquake and tsunami in Chile, and the 1960 tsunami took another 200 lives among Japan, Hawaii, and the Philippines. Approximately 870 km to the north of the February 27 earthquake is the source region of the magnitude 8.5 earthquake of November, 1922. This great quake significantly impacted central Chile, killing several hundred people and causing severe property damage. The 1922 quake generated a 9-meter local tsunami that inundated the Chile coast near the town of Coquimbo; the tsunami also crossed the Pacific, washing away boats in Hilo harbor, Hawaii. The magnitude 8.8 earthquake of February 27, 2010 ruptured the portion of the South American subduction zone separating these two massive historical earthquakes.

Having been in several earthquakes, I can relate to the dislocation effect of the phenomena. It is very scary to have the earth begin to move and for my part, I knew instantly what was happening. The largest earthquake ever recorded in Arizona was a 5.6 tremor on the Arizona-Utah border in 1959. To quote the USGS, the earthquake caused minor damage to chimneys and walls at Fredonia, Arizona, and Kanab, Utah, about 15 kilometers north of Fredonia. In addition, windows broke in houses and stores and dishes fell from shelves at Fredonia. Almost all merchandise was shaken from shelves in stores. A rockslide at Mather Point in the Grand Canyon was attributed to the shock.USGS.