Characterized by their muscular guitar sound and the powerful vocals of frontwoman Jenny Toomey, the aptly named Tsunami was among the most important and original bands to emerge from the American indie scene of the 1990s; the motivating force behind the highly regarded Simple Machines label, the group's sociopolitical activism and unwavering commitment to D.I.Y. principles established them among the most respected voices in the alternative community. Tsunami was formed in Arlington, Virginia in 1990 by Toomey and guitarist Kristin Thomson, who together had founded Simple Machines as a result of their constant frustrations with music industry machinations.