In July 2011 a glacial lake outburst flood occurred when a marginal lake adjacent to Mendenhall Glacier drained suddenly and partially flooded the shores of Mendenhall Lake, threatening area homes. The project has to complementary goals: 1. detection of seismicity releated to a GLOF for design of a future early warning system. 2. evaluation of new instrumentation-Trillium Compact All Terrain gimbaled seismometer