Bush dance traditional UK and Irish tunes. UK, Irish and USA session players would know variations of most of the tunes. Rhythms include – Reel, Jig, March, Waltz and Hornpipe. Instruments – Fiddle, Piano, Accordion both Piano and Melodeon, Concertina; both English and Anglo, Tin whistle, Bush bass, Guitar, Banjo and all types of Percussion, including lagerphone. Electric amplified instruments, such as electric bass guitar or electric guitar have been used since the 1970s. Bush dances are similar to American line dances or American square dances, in that all dancers know certain steps and execute them together. Partners are often changed in
Types of volcanic eruptions "Ultra-Plinian." Subglacial and phreatic eruptions are defined by their eruptive mechanism, and vary in strength. An important measure of eruptive strength is Volcanic Explosivity Index (VEI), an order of magnitude scale ranging from 0 to 8 that often correlates to eruptive types. Volcanic eruptions arise through three main mechanisms: There are two types of eruptions in terms of activity, explosive eruptions and effusive eruptions. Explosive eruptions are characterized by gas-driven explosions that propels magma and tephra. Effusive eruptions, meanwhile, are characterized by the outpouring of lava without significant explosive eruption. Volcanic eruptions vary widely in strength. On the one extreme