Consider the following statements about earthquakes 1. The intensity of an earthquake is measured on the Mercalli scale. 2. The magnitude of an earthquake is a measure of the energy released. 3. The magnitude of the earthquake is based on direct measurements of the amplitude of the seismic waves. 4. In the Richter scale, each integer represents a hundredfold increase in the resultant energy released. Which of the above statements are correct?

• A. 1,2 and 3
• B. 2,3 and 4
• C. 1 and 4
• D. 1 and 3