[ 53 ] Earth and Space Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • The U.S. Geological Survey (USGS) tracks the annual occurrence and effects of natural hazards in the United States. Based on its data, the USGS has calculated the probability of a natural hazard occurring in any given year that would cause 10 or more fatalities. The table lists the probabilities for the four most commonly occurring natural hazards. Event Probability of an annual event with ≥10 fatalities in the United States Earthquake 0.11 Hurricane 0.39 Flood 0.86 Tornado 0.96 0 = no chance of occurring / 1 = 100% chance of occurring Write the appropriate natural hazard from the table on the line in the passage. A boundary between the Pacific and North American tectonic plates lies along the west coast of the continental United States. The probability of a(n) _______________ with 10 or more fatalities is much higher in this region than the probability for the United States as a whole.