“The magnitude-7.8 earthquake that struck Nepal on Saturday morning destroyed parts of Kathmandu, trapped many people under rubble and killed more than 2,500 people. It was the worst to hit the country since a massive 1934 temblor killed more than 8,000.”
Even though we know that with the plate tectonic boundaries where these disasters are more likely to occur, it never fully is expected. These before and after pictures are heart-rending and full the extent of the damage is hard to comprehend (explore in ArcGIS online).
Geographer Jon Kedrowski has a blog about his mountaineering and expeditions. He is up on Everest now, and his blog has a description of the earthquake and the resulting avalanche. The pictures and descriptions are both sobering and fascinating.