There was a M5.6 strike-slip quake a few days ago in east Antarctica. Quakes are rare in Antarctica...at least large enough to be located. This may be the largest since I have been paying attention on the continent itself...although there was a M8.2 on the Antartic plate, but beneath the ocean. I am a co-author on a paper on the TransAntarctic Mountain front...where the mountains rise 4 km from sea level and there is a narrow fault zone with as much as 8 km of structural relief (meaning, the rocks slipped by each other this much vertically but the footwall eroded). There does not seem to be any significant seismicity along 100s and 100s of km of this mountain front. So, maybe the Mountains have not really been doing much for the last 20 million years.
There is some thought that the removal of ice since the last glacial maximum (10 or 20 thousand years ago) has suppressed normal slip earthquakes.
Chris

• M5.6 Antarctica