Time‐space‐magnitude interdependence of upper crustal earthquakes in the main seismic region of New Zealand

A study is made of the time‐spacemagnitude dependence of upper crustal earthquakes through the ideas of conditional intensity and conditional expected magnitude. Strong clustering is found within short distances and times before and after a large event. Seismic gap of smaller earthquake activity prior to an impending large earthquake within jts vicinity and increase in b ‐value of shocks after a large event are also observed.