The dire consequences of an earthquake that will be generated by a movement of the Marikina Fault have been the focus of intense discussions for the past few weeks. The fact of the matter is, although Manila had been severely damaged by earthquakes over the past several hundred years, none of these had been traced to the Marikina Fault, Instead, in historical times, most of these have emanated from the Philippine Fault, an active earth rupture nearly 100 kilometers east of Metro Manila. Thus, even without considering the  Marikina Fault, Metro Manila is vulnerable to high intensity earthquakes. However, based on recent experience and extensive studies of subsurface geology, it is now also recognized that not all parts of Metro Manila are equally susceptible. Many areas are relatively low risk zones while some are of very high risk. Therefore, as the urban center where the country’s most important infrastructures are located, this metropolis needs a detailed geological study to delineate high and low seismic risk areas from a foundation engineering perspective.