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Major Earthquakes Increase 47 % in 3 Decades

Posted by feww on December 13, 2008

Worldwide Earthquakes [Magnitude 6 to 9.9] have increased by 47 percent in under 3 decades

A total of  1,085 earthquakes measuring magnitude 6 or greater occurred between 1980 to 1989, averaging 109 per year over the decade. In the 1990s the decadal total increased to 1,492 averaging at 149 major earthquake  per year over the period.

Since January 1, 2000 [ see table below for the date and time] a total of 1,438 major earthquakes have so far occurred worldwide raising the annual total over the last 9 years to 160 with more than 12 and a half months to go to the decade’s end.

The increase from 109 to 160 major earthquakes per year in the 1980 to 2008 period translates to a rise  of 47 percent in just under three decades.

Major Worldwide Earthquakes [Magnitude 6 to 9.9] – 1980 to 2008 – Source of data: USGS.

Other Data

With an estimated total death toll of 88,072 [as of Dec 3, 2008,] this year has seen the second worst number of human casualties caused by earthquakes since 1980. The largest earthquake/ tsunami related casualties for the 29-year period occurred in 2004 with an estimated total of 228,802 deaths.  [The stats are based on USGS data.

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5 Responses to “Major Earthquakes Increase 47 % in 3 Decades”

  1. Eocene said

    The chart from the group Horizon Project is illustrated from the recrded historical data taken right of the “U.S. Geological Survey” website. Here’s the websites Earthquake 6 – 8 and higher chart showing radical increases.

    If you look at the impressive spiking at the end of that chart ending with the year 2006 data, it’s even more impressive and actually scary where you tally up the recorded increases for the years 2007, 2008, 2009 and 2010. Why ? Because they have to rebuild that chart because the increase for those years is more than doubled of those large previous spikes.

    Increased Deforestation, increase in CO2s and increase in overall global temperatures have almost identical historical charts and radical spiking, except they start to increase and peak from 1982 forwards unlike the earthquake increase which starts to dramatically rise around 1997/8 to the present. So do those factor in as a type of cause and effect with regards increase in earthquakes ? Absolutely.

  2. […] Major Earthquakes Increase 47 % in 3 Decades […]

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