>When my parents visited us earlier this year the very first thing my mother asked about on the way in from the airport was why so many of the houses looked like they were built out of cheap wood. Every place I've ever lived in Europe feels like a bomb shelter by comparison;

Houses in California are going to look less "solid" than houses elsewhere because houses elsewhere are often built out of brick or stone, materials that are vastly more likely to fail in an earthquake. Wood-frame, wood- or stucco-sided homes are common in California because they are much more likely to withstand earthquakes.