A Summary Paper
http://science.sciencemag.org/content/345/6198/720
List of Large-N Arrays
http://web.gps.caltech.edu/~clay/LB3D/LB3D.html
http://ds.iris.edu/gmap/YW?timewindow=2016-2016
http://ds.iris.edu/gmap/1B?timewindow=2014-2014
http://ds.iris.edu/gmap/1D?timewindow=2014-2014
http://ds.iris.edu/gmap/ZG?timewindow=2014-2014
http://ws.resif.fr/fdsnws/station/1/query?network=XP&format=mseed&level=response
https://sites.google.com/site/florentbrenguier/research/volcarray