Earthquake measuring 8.9 in Richter Scale hit Sumatra on Wednesday, 11 April 2012. Tremors were felt in Bangalore, Kolkata, Chennai, Guwahati, Delhi, and many other cities of INDIA. Tremors were also felt in Sri Lanka and many other countries. Tsunami alerts were issued to 28 countries across the world. This magnitude of Earthquake had a high potential to generate destructive Tsunami can affect coastlines across the entire Indian Ocean basin.