6,372 Years of Global Volcanic Eruptions.

July 12, 2013 6,372 Years of Global Volcanic Eruptions: I downloaded all volcanic eruptions, from 4360 B.C. to 2012 A.D.; which is a total of 6,372 years. I graphed the volcanic eruptions by VEI (Volcanic Explosive Index), which is displayed above. Only 540 of the volcanoes in the NOAA database had VEI ratings, out of a total of 614 events.

The VEI is a method of eruption classification that volcanologists use to classify events, much like the Richter scale classifies earthquakes. The VEI is an exponential scale, in that one increase up the scale (which runs from 0 to 8) is a tenfold increase in destruction power. For example, a VEI 4 event is ten times stronger than a VEI 3 event. A VEI 5 event is 100 times stronger (10 X 10 = 100), while a VEI 6 is 1,000 times stronger than a VEI 3 (10 X 10 X 10 =1,000). See below for the complete Volcanic Explosive Index (VEI) scale:

Volcanoes and earthquakes are related in that the tectonic plate boundaries that cause most global earthquakes are also responsible for most volcanoes. The belt of volcanoes that surround the Pacific Ocean and the “Ring of Fire,” contains about two-thirds of the world’s active volcanoes.

Next, I graphed the volcanic eruptions by month, as shown below:

Of the 614 events in the NOAA database, only 509 had a month listed. The unusual thing about this chart is that the high of 65 for August and the low of 30 for November are beyond two standard deviations from the mean, which puts them in the statistical oddity category. Again, each research answer leads to ten new questions.

I then graphed the day of the month that the eruption fell on, as can be seen in the graph below:

The low of 7 eruptions on the 14th of the month and the high of 24 eruptions on the 17th of the month are outside the statistical reasonableness. Something else is at work here.

Volcanoes can cause destruction in more ways than earthquakes: the blast itself, avalanches, lightning, floods, gas emissions; indirect deaths from disease, starvation, exposure and desolation; lave and mudflows, pyroclastic flows, ash, bombs, steam blasts, and tsunamis.

Lastly, I graphed all eruptions from 1900 to 2012 (291) by year as seen below:

The average per year is about 2.5. The exponential trend line is slopping up. The last seven years on the graph show the following number of eruptions per year: 2006 = 7, 2007 = 2, 2008 = 4, 2009 = 2, 2010 = 7, 2011 = 9 and 2012 (thru April 13th) = 1. It looks like world-wide volcanic activity is increasing at an alarming rate. Other cycle information supports this conclusion.

The Master of Disaster

About wfoster2011

Disaster researcher and current financial and economic news and events: Accidents, economics, financial, news, nature, volcanoes, floods, earthquakes, fires; airplane, ship & train wrecks; tornadoes, mine cave-ins, hurricanes, pestilence, blizzards, storms, tzuami's, explosions, pollution, famine; heat & cold waves; nuclear accidents, drought, stampedes and general. Futures trader using high volume and open interest futures markets. Also, a financial, weather and mundane astrologer with over 30 years of experience. Three University degrees from California State University Northridge: BS - Accounting MS - Busines Administration BA - Psychology Served in the U. S. Army as an Armored Platoon Leader in the 5th Battalion, 68th Armored Regiment, 8th Infantry Division (Retired). Have published three books and 36 articles available for sale through my blog: Commodology - Secret of Soyobeans (Financial Astrology) Timing is the Key (Financial Astrology) Scum City, a fiction novel (no longer available, under contract to major publisher) Currently resident of Las Vegas, NV, USA
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4 Responses to 6,372 Years of Global Volcanic Eruptions.

  1. Jacquelyn Fedyk says:

    Perhaps if you were to make a graph of all the VEI 3 through VEI 8 volcanic eruptions by year, you might be able to see if they correspond to the 11 year solar sun spot activity. Really like the background pictures on your graphs! 😉

    • wfoster2011 says:

      I have done correlation analysis’ with earthquake data, which leans itself more to an accurate analysis since the sample size is so much larger. For example, I did a correlation test between the yearly quantity of earthquakes, from 1973 to 2011 – greater than or equal to 6.0 magnitude – and the reults were terrible. The sample size was 5,311 quakes over 39 years and the correlation r% was -39.9%. That means their is a moderate negative correlation but it’s really meaningless. Perhaps a monthly study would prove to be more accurate, but looking at the monthly data I don’t think so.

      • Jacquelyn Fedyk says:

        Perhaps a decade study instead of a monthly study. It might more closely correspond to sun spot cycles.
        Thank you,

        • wfoster2011 says:

          I did 39 years, using 5,311 earthquakes >= 6.0 magnitude – that’s almost four decades.
          Bill Foster

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