July 1, 2012 – Global and U.S. Earthquake Statistics: The following graphs are based on USGS data and reflect the number of Global and United States earthquakes, with a magnitude greater than or equal to (>=) 5.0. Note the exponential trend lines (yellow), projected two periods out (2012 and 2013). According to this trend line, Global earthquakes are on the increase; while U.S. quakes are less so.
The graph below shows the number of Global earthquakes by year, magnitude and depth in kilometers:
For the three years shown above, calendar year 2010 was very deadly with 320,120 deaths.
Of the ten years shown above, 2004 was devastating and tragic. That was the year of the Sumatra, Indonesia quake and massive tsunami.
For the ten-year period above, 1990 saw no great earthquakes (>= 8.0 Magnitude); however the large quakes that did occur were shallow and close to population centers.
The 1980’s was significant in that no one year stood out (may 1988), however, almost all years had a high death rate. (Credits – Data: USGS Graphs: Top two – W. G. Foster, All Others – USGS, Narrative – W. G. Foster).
The Master of Disaster