It's #FreeMapMonday! Retweet and follow us for a chance to win the Earthquakes & Faults of Southern California product! #USGSStore (U.S. residents only) pic.twitter.com/LmTMA4W8ZX
— USGS Store (@USGSstore) October 22, 2018
via Twitter https://twitter.com/USGSstore
October 23, 2018 at 12:30AM
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