I've got an ex-army signalling mirror somewhere. Too dark to find it if the lights went out and I'd need to learn Morse and have somebody who knew Morse to flash at.

"Timespanner" on FB has been posting pictures from the 1931 Napier quake recently. Making the comparison with the Turkey/Syria quake. One thing I wouldn't have expected was that they had so many disaster tourists in cars that they had parking and traffic problems.