What is earth’s seismic noise?

Topics Covered: Important Geophysical phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc., geographical features and their location- changes in critical geographical features (including water-bodies and ice-caps) and in flora and fauna and the effects of such changes. What is earth’s seismic noise? What to study? For Prelims and Mains: Seismic noise- meaning, source, features …