Three volcanic areas, moreover, the Deception Island, the Mts. This may be considered to be involved in a tectonic stress concentration toward the Easter Island Triple Junction between the Antarctic Plate, the Pacific Plate and the Nazuca micro-Plate. In the oceanic region, in contrast, seismic activity in the area of 120˚-60˚ W sector is three times higher than that in the other oceanic areas. Wilkes Land in East Antarctica is the most tectonically active area in the continent, with several small earthquake events having been detected during the last four decades. However, a few small earthquakes are identified. In general, seismic activity in the continental areas is very low in Antarctica. A total of 13 seismicity areas are classified into the Antarctic continent (3 areas) and oceanic regions within the Antarctic Plate (10 areas). However, according to the development of Global Seismic Networks and local seismic arrays, the number of tectonic earthquakes detected in and around the Antarctic continent has been increased. The Antarctic continent and surrounding ocean have been believed to be one of the aseismic regions of the Earth for many decades. Seismicity in the Antarctic and surrounding ocean is evaluated based on the compiling data by the International Seismological Centre (ISC). Seismicity Antarctic Plate Antarctic Continent Southern Ocean Tectonic Stress Received Novemrevised Decemaccepted January 27, 2014 All Copyright © 2014 are guarded by law and by SCIRP as a guardian. In accordance of the Creative Commons Attribution License all Copyrights © 2014 are reserved for SCIRP and the owner of the intellectual property Masaki Kanao. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. National Institute of Polar Research, Midori-cho, Tachikawa-shi, Tokyo, JapanĮmail: © 2014 Masaki Kanao.
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