Figure skating jumps
Jumps are referred to by how many times the skater turns in the air. One revolution (one and a half for the Axel) is a "single" jump. Two revolutions (two and a half for the Axel) is a "double" jump. Three revolutions (three and a half for the Axel) is a "triple" jump. Four revolutions (four and a half for the Axel, although this has never been done in competition) is a "quadruple" or "quad" jump. The first triple jump landed in competition was a loop jump. It was landed by Dick Button in 1952. The first quadruple jump landed in competition was a toe loop jump. It was landed by Kurt Browning in 1988. Currently, men in world-class competition usually attempt a full set of triples and sometimes one or two quadruple jumps in their free skating programs. Triple Axels are rare for ladies, and quadruple jump attempts even more so.
Salchow jump
Timothy Goebel is recognized to have landed the first quadruple Salchow at the 1998 Junior Series Final. Goebel's jump, however, used the aforementioned controversial two-footed Salchow technique. The first female skater to have landed a quadruple Salchow in competition was Miki Ando at the 2002 Junior Grand Prix Final. Until 2018, no other female skater successfully landed the jump until Alexandra Trusova landed it at the 2018 World Junior Figure Skating Championships, at just age 13.