Thanks to the Shinkansen, Japan's had plenty of practice with this. Their "UrEDAS" (theoretically "Urgent Earthquake Detection and Alarm System", although this

Thanks to the Shinkansen, Japan's had plenty of practice with this. Their "UrEDAS" (theoretically "Urgent Earthquake Detection and Alarm System", although this is just a backronym for yuredasu "starts to shake") monitors both P and S waves and brings trains to a halt automatically, and is considered the gold standard for this kind of thing. In the 50 years they've been running trains, there's been one (1) derailment due to an earthquake, with zero fatalities. https://en.wikipedia.org/wiki/Shinkansen#Earthquake https://en.wikipedia.org/wiki/Shinkansen#Earthquake http://sdr.co.jp/papers/13wcee_uredas.pdf http://sdr.co.jp/papers/13wcee_uredas.pdf