Great Lisbon 1755 Antipodal Impact Quake

The great Lisbon earthquake Nov. 1, 1755 devastated the city and Portuguese coastlines down to Morocco. Many details of the event are typical signs of chaotic terrane caused by an antipodal impact. A faint but fresh-looking antipodal impact structure centered at 35°39′ S, 168°26′ E is found in the Tasman Sea, or about 405 km west-southwest of Cape Reinga, NZ, North Island. By conventional geological methods, the epicenter has been inferred to be on the bottom of the Atlantic Ocean, in an area known as the Horseshoe Plain west-southwest of Cape St. Vincent, Portugal, at a distance of about 200 km from the cape, a round figure estimate. The impact antipode at 35°39′ N, 11°34′ W also is located in the Horseshoe Plain at 277 km west-southwest of Cape St. Vincent, the implied antipodal impact quake epicenter.