Square dance club Square dance club Square dance clubs are the primary form for organization within the recreational activity of square dancing, and more specifically modern Western square dance. This article's focus is the modern Western square dance club, and it is understood in the context of this article that when the terms "square dance club" or "square dance" are used it refers to the form of square dance called "modern Western square dance". Square dance clubs are primarily, but not exclusively, local in character. A square dance club is only as strong as its members, i.e. individual square dancers. The club's primary
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