Relationship between volcanoes and earthquakes

Research has shown that the most usual earthquakes are caused through friction and sliding of tectonic plates one on top of the other. Other factors may be ground instability (e.g. methane gas underground) and explosions. Moreover, since earthquakes and volcanoes usually occur near the edges of tectonic plates, it is known that volcanoes always cause quakes of different magnitudes due to the moving of lava to the surface.

In this experiment, through parsing, analysing and visualizing the data collected by the renowned Smithsonian Institution's Global Volcanism Program (GVP) it will be demonstrated how many volcanic eruptions are placed within a given radius (should be at least 40 km) of earthquake’s epicenter. Data about volcanoes consist of 10,000 years of Earth's volcanism, whereby data about earthquakes consist of only earthquakes with high Richter magnitudes ( > 4)  from year 1964 - 2007.

All the parsed and analysed data will be visualized at the end. Moreover, some textual results will be extracted at the end of the experiment showing the number of volcanoes and earthquakes parsed, the relation of each volcano to the number of earthquakes as well as the correlation percentage (also labeled as dependency ratio) for a given volcano radius.