From the Nature article Figure 3, the primary outburst was located over the mass of unnamed southern bright terrain just S of the Belet sand sea on April 13-14, 2008.
The secondary outbursts then pulsed successively eastward and also pulsed down near the S Pole.
The second "biggie" outburst in this series was located S of Shangri-La.
According to the article there was a small thin elongated outburst along equatorial Xanadu on May 8, 2008. This also went over the Hotei Arcus region.
The T44 Cassini flyby on May 22, 2008 did see small clouds located over Hotei Arcus.
Here is a mosaic I put together (Xanadu thread, post 20
Were the T44 clouds remnants of the May 8, 2008 clouds (itself a result of the intial pulse from S Belet?)
Or was it yet another pulse from the initial S Belet "cloud spasm"?