Interstellar 'Tsunami Waves' Sweep Past Voyager 1

Source - NASA Science News for Dec. 16, 2014

Since 2012, NASA's Voyager 1 spacecraft has experienced three 'tsunami waves' in interstellar space. The most recent, which reached the spacecraft earlier this year, is still propagating outward according to new data.

The complete article can be found here: http://science.nasa.gov/science-news/science-at-nasa/2014/16dec_voyagercme/