Irish stepdance traditional step dance in Munster. This style is largely performed on the balls of the feet with toes pointed outwards. Competitive dancers are judged on posture, timing, rhythm and execution, which in practice means a rigid torso, rapid and intricate footwork, and legs and feet crossed over each other, with knees close together. Irish stepdances can be placed into two categories. Solo stepdances, which are danced by a single dancer, and group stepdances, which are coordinated with 2 or more dancers. "Reel", "slip jig", "hornpipe", and "jig" are all types of Irish stepdances and are also types of Irish traditional
Types of volcanic eruptions face is strong enough to withstand the explosive force, outright eruptions may not occur, although cracks in the rock will probably develop and weaken it, furthering future eruptions. Often a precursor of future volcanic activity, phreatic eruptions are generally weak, although there have been exceptions. Some phreatic events may be triggered by earthquake activity, another volcanic precursor, and they may also travel along dike lines. Phreatic eruptions form base surges, lahars, avalanches, and volcanic block "rain." They may also release deadly toxic gas able to suffocate anyone in range of the eruption. Volcanoes known to exhibit phreatic activity include: Types