WANTED: 300 readers who can help us prove something really important by midnight tonight.
Help make in-depth reporting sustainable with your tax-deductible donation TODAY.
The 9.0 earthquake and tsunami that devastated northeastern Japan in March 2011 did more than rattle the ground and upheave the ocean. Shock waves also rippled all the way up through the ionosphere—the upper atmosphere stretching ~50-500 miles above Earth's surface.
That motion was observed in the signals between GPS satellites and a dense network of ground receivers around Japan, reports NASA. The video explains these observations, never before seen in so much detail for a quake and tsunami of this size.