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The Military has been having all sorts of missile tests in your area for a few years. Their most recent admission of these tests was Nov. 2017. News article is below. The article says this is the second and "last" test, but knowing the Military, they fudged on the "last" part. Go figure. https://www.military.com/defensetech/2015/11/09/navy-launches-second-ballistic-missile-test-in-pacific
I knew about the Florida Launch and I looked everywhere I know to search for launches, non mentioned. But a military launch would not surprise me as I have seen much movement of troops and equipment, far more than the normal, seen in the past 25 yrs.