I’ve been experimenting with various ways to present data in this blog, mainly using static screen shots of graphs. But over the weekend, I started exploring interactive options. In particular, there is a very capable tool out there called Tableau that provides a way to publish analytic graphics to the web, using their publicly available server to process the data. It has quite a lot of flexibility. The analyses below are my first foray into this endeavor. I also updated my earlier post on the Kepler telescope results to make it more interactive as well.
All data is from the U.S. Geological Survey earthquake database.
This first visualization shows the world-wide distribution of earthquakes from January 1, 1973 to October 14, 2011 from magnitude 4.9 to the maximum recorded of 9.1. The tectonic plate boundaries are easily visible. You can change the magnitude and year sliders to limit the data to ranges of values as desired. When you hover over the map, additional controls are available that will allow you to zoom in on specific regions of the map.
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The second visualization shows the most recent few years of earthquake activity around Japan. Scroll through each year by clicking the arrow button under the control labeled “Recent”. Note the significant increase in earthquake frequencies in 2011, centered off the coast of Tohoku, the site of the devastating earthquake that struck on March 11.
