Link: Live California earthquake map
Somewhat similar to a weather map I created, I used some in-between project time to build a multi-layered earthquake map.
This is, from what I could find at the time, the only Google map that contains accurate fault locations, historical earthquake data and live-streaming recent earthquakes. To create the map I hunted down all the data, edited some layers in Google Earth, and fed in some information to Google Maps via Google Spreadsheet mapper and built the multi-layered map.