Active 200-km fault found off Honshu's Kii Peninsula

This just in -

www.japantimes.co.jp...

An active fault around 200 km long that is believed to have been a source of huge quakes in the past has been found off Honshu's Kii Peninsula, according to researchers at the University of Tokyo.

If the fault on the Nankai Trough moves, it could trigger a magnitude 8.0 earthquake, the researchers said, adding they have found a seabed cliff several hundred meters high that was created by the fault's past movements.

doesn't look very good over there...

So is this a new discovery and them making people aware of it? or is this a warning about possible activity from an existing location?