Compared to the top two finishers, Poland’s Ewa Swoboda and Italy’s Zaynab Dosso, Forbes got a poor start and never really recovered, eventually finishing a distant third in 7.13.
Swoboda’s winning time was a meet record and world-leading 7.01 while Dosso ran 7.02, a personal best, in second.
Forbes’ time was her third fastest in the event this season. In addition to her 7.11 to win in Germany on Sunday, the 27-year-old ran 7.03 to win at the Queens Grace Jackson Meet at the National Stadium in Kingston on January 27.
Rojas set a mark of 15.43m eclipsing the mark of 15.36m set by Russia's Tatyana Lebedova in Budapest in 2004.
The two-time world champion opened with a foul but then registered a valid 14.65m in round two to take the lead.
She fouled again in round three before sailing out to 15.29m in round four, breaking her own South American indoor record and moving to second on the world indoor all-time list.
Then on her final jump before a packed Polideportivo Gallur, Rojas achieved her world record mark, adding seven centimetres to the world indoor record that had stood since 2004.
It was also two centimetres farther than her outdoor PB and is the absolute second-best triple jump performance, indoors or outdoors.
