09:40:20 AM at epicenter
Very strong earthquake approx. 100 km out of the coast of Elephant Island, an island which is often visited by Antarctica cruiseliners.
Elephant Island and the smaller islands around are all crowded with antarctic birds and animals. All kind of penguins like emperor penguins, seals, etc are common on these islands.
NO tsunami risk exist for populated islands (there are no people living within a radius of several hundred km). Additionally a M 6.7 earthquake is seldom generating a tsunami.
1003 km (623 miles) S (176°) from STANLEY, Falkland Islands
Update : The magnitude has been lowered by USGS to 6.5, a lot less energy than the initial 6.7. The earthquakes can be compared with the many earthquakes who are occurring at the South Sandwich Islands, islands with similar animals.
Update : We said earlier that these islands are a regular destination stop for Antarctica cruise ships.  This destination is not so common than the Antartic peninsula, but we would not be surprised that tourists were visiting the penguin population on one or more islands.
This text is part of the program of Antarctica espedition organizer Oceanwide Expeditions :
The Atlantic Odyssey offers a unique possibility to visit several of the remotest islands in the world. Besides the Antarctic Peninsula, the South Shetland Islands, South Georgia and the South Orkney Islands, the Atlantic Odyssey visits Tristan da Cunha, St. Helena, Ascension Island and Cape Verde.
Update : As it is Antarctica summer and thus Tourist season, at least a couple of thousand people may have been walking on one of the many penguin islands of the Antarctic peninsula and may have felt the earthquake. A M 6.5 earthquake will be probably felt within a radius of several hundred km.
Update :  Very strong aftershock of M 6.2. We expect many more aftershocks to happen the following hours and days.

for more and updates, go to:    http://earthquake-report.com/2012/01/15/earthquakes-list-january-15-2012/