Augmented seventh Adding a diesis to this makes up an octave. Hence, this interval's complement, the diminished second, is often referred to as a diesis. Augmented seventh In classical music from Western culture, an augmented seventh is an interval produced by widening a major seventh by a chromatic semitone. For instance, the interval from C to B is a major seventh, eleven semitones wide, and both the intervals from C to B, and from C to B are augmented sevenths, spanning twelve semitones. Being augmented, it is classified as a dissonant interval. However, it is enharmonically equivalent to the perfect octave. Since
Tropical Storm Octave (1983) to clean up dried mud near some rivers. Many destroyed buildings were later rebuilt. Considerable experience was also gained on how to protect flood banks. Ever since Octave, most of southern Arizona has been a drought. Repair costs from Octave totaled $60 million. It is estimated that it took four months for floodwaters to recede across southeastern Arizona and portions of New Mexico. Tropical Storm Octave (1983) Tropical Storm Octave was considered the worst tropical cyclone in the history of Arizona. The origins of Tropical Storm Octave were from a tropical disturbance that formed south of the Gulf of Tehuantepec