A research geophysicist with the United States Geological Survey looks at a series of images that illustrate the seismic waves of an earthquake.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/scientists-are-developing-way-warn-you-earthquake-starting
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/huffington-post-0
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/natural-disasters
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/earthquakes
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/scientists
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/disaster-preparedness