Preparing for the Big One

Scientists cannot predict the day an earthquake will strike, but they can estimate what a large one would do. Studies of the West Valley Fault, which runs through parts of Metro Manila and nearby provinces, have modeled a strong earthquake that could collapse many buildings, start fires, and cut roads and water lines, a scenario popularly called "the Big One." Such studies are sometimes criticized for spreading fear, since no one knows whether the event will come in ten years or two hundred. Yet their purpose is not prediction but preparation. By identifying which areas and building types are most at risk, they allow governments to prioritize the retrofitting of schools and hospitals, plan evacuation routes, and stockpile supplies where damage would be greatest. For households, the lesson is similar. A family cannot prevent an earthquake, but it can secure heavy furniture, agree on a meeting place, and keep water and a first-aid kit ready. The uncertainty of timing, which seems to make preparation pointless, is in fact the strongest argument for it: because the event could come at any time, the only sensible moment to prepare is now.