This article refers to the idea of a future event. It attempts to address a combined amount of information and make the best possible decision on a likely outcome should there be an actual event.
September 23, 2015 is a date that refers to the potential of a large-scale false flag event that could potentially be several combined disasters in one, with the most prevalent being an asteroid impact on the earth. The impact is believed to happen in either the Gulf of Mexico or north-northeast of Brazil and cause a massive tsunami that will wipe out coastal areas, including much of the southern and eastern United States, likely giving the pretext to initiate Martial Law.
Evidence comes from a claim a few years ago that an asteroid was on a collision course with earth. Some claim that the date has been known about long before that, being referred to in one instance by a television show from the late 1990's.