[SCG61-P27] Precise hypocenter distribution in the focal area of the 2016 Mw7.8 Kaikorua Earthquake, New Zealand
We had installed 75 temporary seismic stations before the earthquake in the South Island, New Zealand in addition to GEONET stations. The seismic network has successfully recorded the mainshock and the following aftershocks. Here, we relocated the hypocenters of the events associated with the Kaikoura earthquake by using data obtained from the seismic network. The hypocenters was determined by the double difference hypocenter determination algorithm (i.e. HYPODD, Waldhauser and Ellsworth, 2000).
The overall distribution of the hypocenters are distinguished into two clusters, northern and southern clusters. The hypocenter distribution in vertical cross section normal to the major alignment of the aftershocks in N54W reveals that the fault in southern part dips to eastward. On the other hand, although we find out a northern cluster in terms of horizontal projection, no obvious faults are recognized in the vertical cross-section, suggesting complex fault structure in the northern cluster.