What would a California earthquake early warning look like?
Probably something like this clip from Japanese TV, which shows a session in Japan's parliament when last months' 9.0 earthquake struck.
The Japanese earthquake early warning system had some bugs. For one thing, the sensors under-estimated the size of the massive earthquake. They also misjudged how much of the country would feel it.
Still, to researchers who work on earthquake warning systems, what happened in Japan was proof: The systems work. Read the full article here
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