The earthquake that struck Japan on March 11, for a moment, will accelerate the movement of the Antarctic ice. Surface seismic waves have passed over the world and pushed the ice stream in West Antarctica Uillansa, forcing him to move about half a meter. Fortunately, this did not lead to its destabilization.
Ice flow Uillansa, one of the most studied in Antarctica (photo Radarsat Antarctic Mapping Project).
Feed Uillansa moves ice from the West Antarctic ice sheet in the Ross Ice Shelf. Observations that Mr. Walter and his team are using GPS systems in 2007, showed that the glacier is accelerating twice a day for about half an hour.
The average flow rate — about a meter a day, but during acceleration it is almost half a meter at a time. A sudden slip causes the tides. And it is so strong that it is able to generate its own seismic waves, which it and determine.
It seems that the Japanese earthquake of 9 points caused a similar event. Analysis of Friday's data showed that the slide occurred earlier than usual, and at a time when the surface seismic waves are born to the Japanese coast, had to reach Antarctica.
Strong earthquakes are known to generate seismic waves that are able to bypass the planet several times. "What an example of last year's Chilean shocks" — concluded Mr. Walter.
Prepared according to NewScientist.Author: Dmitry Tselikov