Many of you will have heard on the news that there has been another earthquake in Indonesia today. The earthquake, measuring 6.3 on the Richter Scale, struck Padang - on the island of Sumatra (shown on the map below) - at 1049 local time, and it is estimated that up to 100 people were killed.

The BBC site has coverage of the story here and some eyewitness accounts as well as information about how earthquakes occur, and a history of major earthquakes around the world.