It's interesting. I did have a little reaction to the warning, but the fear pangs passed very quickly when I realized that if I was going to feel any shaking it would have probably been before I even got the "warning." My dad's phone went off several minutes later (different cellular provider) --laughable.
The area where I live is seismically active, and we do feel earthquakes pretty frequently. Most of them are 4.0 or less but they are within about 30 miles. A 6.7 temblor hit out in the Nevada desert last year and it shook us up pretty hard here, but there was no Google warning on our phones for that one. Obviously Google must be using telephone service areas, or political boundaries, instead of properly using geographic data, to determine who should be warned. I suppose that Apple is using the same or similar system on their iphones.
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