Volcano Monitoring—Earthquake signals educational

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=nlo-2JoNHrw

www.iris.edu/earthquakeEarthquake activity beneath a volcano almost always increases before an eruption because magma and volcanic gas must first force their...

volcano, monitoring, seismic, signal, eruption, seismology, earth science, volcano monitoring, earthquake, seismogram, US geological survey, iris
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