Nice.... and thanks for the effort. What do you think about ocean temps correlating with this?
I believe it is well know that the oceanic volcanic activity has picked up.
I found the source of that graph:
https://volcano.si.edu/faq/index.cfm?question=historicalactivity
Figure 2. Graph showing *
known* historically active volcanoes, number of volcanoes *
reported to be* active each year, and population
"A dramatic increase in both the number of historically active volcanoes and recorded eruptions took place about 1500 CE. These resulted in part from the great Spanish/Portuguese marine explorations – the Age of Discovery – around the end of the 15th century, when explorers opened Latin America and much of the western Pacific to European record-keeping. Perhaps equally important was the development and widespread distribution of the printing press in the late 15th century, markedly increasing the likelihood that new volcanological records would survive"
So the context of that graph is really more about the growing and expanding population and their ability to report volcanic activity.
The first paragraph of the site actually says:
"The Global Volcanism Program
does not see any evidence that volcanic activity is actually increasing. Data about eruptions has been compiled by the Smithsonian since 1968 in order to provide context for global volcanism. The following figures and discussion are modified from an introductory section in
Siebert et al. (2010); data is through 2009, but more
recent data is available. Please do not reproduce the figures below without all of the accompanying analysis and proper citation (links are preferred). There is great value in knowing the recent volcanological record, but its limitations are not always apparent. Readers are
strongly cautioned against mistaking the record for the reality."
.
www.scienceunderattack.com
