Question

the seismic-gap method of earthquake forecasting works by identifying _______. where hypocenters and epicenters are separated by the smallest vertical distance; triple junctions and predicting where rift valleys will form in pull-apart gaps; segments along a fault that not moved for the longest amount of time; where along a fault the largest amount of vertical displacement has occurred

Explanation:

The seismic - gap method for earthquake forecasting is based on the idea that along a fault, segments that have not moved (experienced an earthquake) for the longest time are more likely to have accumulated stress and are potential sites for future earthquakes.

• The first option is incorrect as the separation of hypocenters and epicenters by vertical distance is not related to the seismic - gap method.
• The second option is wrong because triple junctions and rift valley formation in pull - apart gaps are not the focus of the seismic - gap method.
• The fourth option is incorrect as the seismic - gap method is about segments with little or no recent movement, not those with the largest vertical displacement.

Answer:

C. segments along a fault that not moved for the longest amount of time