Date of event: November 14, 2016
Location of event: Christchurch, New Zealand
UFOs are often seen during and after earthquakes, just like in this video below you see lights from a UFO that exited from the ground. It had to have been giant, about 1km for the opening to cause such an earthquake as it did. Christchurch is a hotbed of UFO activity over the last five years, so this is really no surprise.
Its known from the Friendship case (Rocca Pia, Italy) that when aliens were to make an opening for a city or leave a city, they only had to command it, and the technology would open a cavern in the ground the size of city that even had its own weather system. Friendship case also states that people would just stand on the ground and the ground would gently and fast, lower itself, while the opening on top closes, until the person arrived at the city below the ground.
Scott C. Waring