[jakzurr]

At the plastics plant I worked at in the 2010's, they had seismic emergency valves for the natural gas. At the time, I thought they were such a pain, as the vibration caused by a semi-trailer bumping a warehouse dock could cause them to shut off. (But it only took a screwdriver and 2 minutes to reset the valve.)

Now I'm thinking such valves are a good measure. I have no idea if they could work in such a major quake, though - for example, if the gas line fractured farther back from the seismic cutoff valve?

[kalleboo]

It looks like the building used LP Gas from a tank, and the was an automatic shutoff valve at the tank end and in each individual shop in the food court, but that still leaves all the pressurized gas in the large piping from the tank to the inside of the building.

https://www.youtube.com/watch?v=iQlaUfMPHFI https://www.youtube.com/watch?v=tHwJHyoGQWw