Insta Profile - https://www.instagram.com/hrsht.dwivedi Hindi Version - https://youtu.be/mOL7wuknv6w Continental Drift Theory 1912 By Alfred Wegener Explained - https://www.youtube.com/watch?v=moTDU4bCLlw Seafloor Spreading Theory by Harry H Hess & Contraction Theory Explained - https://www.youtube.com/watch?v=51vi7vYuvpA Plate Tectonics Theory, Major Tectonic Plates, Rings of Fire, San Andreas Fault - https://www.youtube.com/watch?v=Vd0SjMn-UUM Why Tsunami Waves Larger at the Coast - https://www.youtube.com/watch?v=IYplK2zAEmk First of all I have explained what hypocenter, focus and epicenter are. Then I have explained the methodology of how an earthquake and tsunami occurs. Please watch the video to know more about occurrence of Earthquakes and Tsunamis.