Natural gas is an issue in earthquake prone area’s. Unless you have the special earthquake gas shut off value it often causes fires after the earthquake.
“Unless you have the special earthquake gas shut off value it often causes fires after the earthquake.”
1906 can’t be the paradigm in the 21st Century.
CA Native with 50+ years in-grade & I can tell you they scare the bejeezus out of people with that stuff, and for sure if a gas leak meets a source of ignition there’ll be trouble, but “often causes” is in the dystopian horror flick of the terminally terrified.
In the Real World, it’s “could cause” and the odds are long enough that actual occurrences are anomalous. Furthermore, in a quake strong enough to spark dozens of structure fires from gas leaks, it won’t be the lines INSIDE the building that will be the biggest problem; it’ll be ruptured gas mains OUTSIDE under the street. You get seismic shutoff valves designed to cut service on those lines, and all the many building service meter connections will be just fine without independent shutoff valves of their own.