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Shallow focus (0-70km), intermediate focus (70-300km), and deep focus (greater than 300km)
divergent plate boundaries
focus
Frequent shallow earthquakes
At divergent and transform boundaries.
shallow focus Intermediate focus Deep focus
Shallow
All of New Zealand has earthquakes. Have a look for a map of NZ earthquakes 1990 - 99 on the gns.cri.nz website. Shallow earthquakes are spread indifferently throughout NZ. And these are the ones of most importance to buildings etc. Deep earthquakes have a different distribution, and are more closely associated with the descending Pacific Plate. The shallow earthquakes reflect the strains generated by the plate movement and the subsequent redistribution of strains.
Earthquakes occurring at a depth of less than 70 km are classified as 'shallow-focus' earthquakes, while those with a focal-depth between 70 and 300 km are commonly termed 'mid-focus' or 'intermediate-depth' earthquake.
Shallow focus (0-70km), intermediate focus (70-300km), and deep focus (greater than 300km)
Shallow focus earthquakes generally cause more damage.
Earthquakes that happen in shallow water cause tsunami and other side affects like landslides.
divergent
North Carolina has an intermediate geothermal gradient!
divergent plate boundaries
focus
Frequent shallow earthquakes