Why it is so hard to get an earthquake warning system

This article is from the source 'washpo' and was first published or seen on November 02, 2015 17:06 (UTC). It last changed over 40 days ago and won't be checked again for changes.

You can find the current article at its original source at https://www.washingtonpost.com/national/health-science/when-an-earthquake-is-coming-how-can-you-get-even-a-little-warning/2015/10/30/df12c640-63c1-11e5-9757-e49273f05f65_story.html

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