earthquakes

Why don't countries like Nepal just build a fence around the edge of the country to keep the earthquakes from entering in the first place? Very simple and saving a lot of lives

Alpha male here. Unfortunately, it is as yet unknown how or why earthquakes occur, and there position can't be anticipated. String theorists are working on a model for this, but it is a few years away yet. For now, any earthquake enveloping trench would have to encompass the entire Earth to avoid being misplaced. When the entire Earth is a trench, the comparison to an anus is apt. That is why it hasn't been attempted yet, and won't until string theory allows us a more whole view of what exactly an earthquake is.