It was a very informative Makeover Monday this time. I had to go through a few articles to understand the data-set properly. I have a little better understanding of which countries have volcanoes and what the main rock type or the primary volcano type is, and about the ring of fire etc.
I liked the original viz. Please see below:

It denotes different volcano types with different shapes and colored with respect to the eruption date from past to present, representing past to present as lighter to darker.
What I tried to do is to focus on one of the countries. My pick was Japan, including Japan administered by Russia. My aim was to:
- Have a closer look at the volcanoes on the map to know their exact location,
- Highlight the main volcano type in Japan, and
- Visually represent the volcanoes below and above sea level.
Japan is heavily affected by volcanoes and hence I thought it would be a good pick for analysis. Please find my viz below.

Click here for interactive viz