Amplification factors decrease as the acceleration on bedrock increases, and this decrease is more pronounced for short period than long period ground motions. Short period ground motions can be amplified 2.5 times or more on soft soils during moderate shaking (Map 5; i.e. to 0.25g, where acceleration on bedrock is 0.1g). Conversely, relative amplification of short period ground motions due to the presence of soft soils during strong shaking is minimal, and all areas will be shaken strongly but more or less equally (Map 7; in this case ~0.4g). Although little amplification of short period ground motions will occur during strong shaking (Map 7), moderate shaking is much more likely to occur, so that areas shown as having a high amplification hazard on Maps 1 and 2 will be subjected to potentially damaging short period ground motion much more often than low hazard areas. For example in the Victoria area, shaking of 0.1g on bedrock is more than ten times as likely to occur as shaking of 0.4g on bedrock. Although amplification of long period ground motions also diminishes as the intensity of ground shaking increases, it is still significant at 0.4g (Maps 6 and 8). Thus, in most cases (e.g. Maps 5, 6 and 8) and most often, the amplification hazard ratings shown on Maps 1 and 2 will reflect the intensity of amplification due to soil conditions (see relative amplification hazard map and accompanying report for more details; Monahan et al., 2000b).