It becomes easy to comprehend the activity of Iceland, Hawaii and Indonesia when looking at the convection cells pattern. The 2D sketch of equator plane is:

And the relevant world map of the same lines is then:

Where the lines for Iceland, Hawaii and Indonesia are marked red.
All this can be derived from one simple precondition: Stability conditions of the mantle.
Once understanding what this means, calculations can replace compiling data in many cases, saving effort and money on a grand scale.
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Published by Steingrimur Thorbjarnarson
I have a BS degree in geology, BA in anthropology, graduated in Chinese language and as a certified tourist guide. I provide this website about my contribution to answer the greatest question remaining about our Earth. I have analyzed the convection rolls within the Earth's mantle and how they affect the surface. This makes it possible to provide many interesting examples about geology found on my blog.
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