Consider the following statements 1 Propagation velocity of the seismic waves through solid rock ran...........

Geography Shape and Motions of Earth

Consider the following statements:

1. Propagation velocity of the seismic waves through solid rock ranges depending on the density and elasticity of the medium.

2. Most of the earthquakes are caused by movement of the Earth's tectonic plates, human activity can also produce earthquakes.

Which of the statements given above is/are correct?

1 only

2 only

Both 1 and 2

Neither 1 Nor 2

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Explanation:

While most earthquakes are caused by movement of the Earth's tectonic plates, human activity can also produce earthquakes. Four main activities contribute to this phenomenon: storing large amounts of water behind a dam (and possibly building an extremely heavy building), drilling and injecting liquid into wells, and by coal mining and oil drilling. Perhaps the best known example is the 2008 Sichuan earthquake in China's Sichuan Province in May this tremor resulted in 69,227 fatalities and is the 19th deadliest earthquake of all time.