This 24″ wide by 36″ tall poster illustrates the violence and distribution of ground shaking produced by three types of Pacific Northwest earthquakes:
1. A magnitude 9 Cascadia subduction zone earthquake;
2. A “deep” earthquake within the Juan de Fuca Plate beneath the southern Puget Sound (e.g. like the 2001 Nisqually earthquake);
3. A magnitude 6.8 earthquake on a local crustal fault (e.g. the Portland Hills Fault).
Peak ground acceleration and likely building damage is illustrated for these three types of earthquakes.