Taking the Measure of the Earthquake That Destroyed Tokyo
Cars That Think
SEPTEMBER 1, 2023
The violent vertical thrusts of the quake ruptured gas lines and water mains. When the ground shook, the mercury would close an electrical circuit and stop an attached clock. One of the simpler technological responses to the Great Kanto Earthquake was the invention of the seismic gas shutoff valve, or SGSV.
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