NASA's Innovative Tsunami Detection Technology Tested Successfully.

NASA is testing a new technology called Guardian to detect tsunamis by the disturbances they create in the Earth's atmosphere. The technology uses data from GPS and other satellites to detect real-time positional accuracy down to a few inches. Once a tsunami strikes, the system monitors the displaced air as well as the charged particles that slam into the ionosphere. The Guardian's near-real-time monitoring tool is one of the fastest of its kind and is being developed to augment early warning systems by sifting the signals for clues that a tsunami has arisen somewhere on Earth.