Beanland, S.; Berryman, K.R. 1987 Ruahine Fault reconnaissance. Lower Hutt: New Zealand Geological Survey. New Zealand Geological Survey report EDS 109 15 p.
Abstract: This reconnaissance study of the Ruahine Fault is part of a seismotectonic hazard evaluation for Mohaka River power development in progress by the New Zealand Geological Survey (NZGS) for the Ministry of Works and Development (Hancox and Berryman 1986). The Rushine Fault trends northeast and passes approximately 15 km west of te Mohaka Fault near the Mohaka River. Late Quaternary traces occur discontinuously along the Ruahine Fault and are described here from three localities near the Mohaka River. Evidence from these sites suggests that several earthquakes have occurred in this region since 16-17 ky ago and during the Holocene. One event may have occurred during tha last 1800 years. Each event is likely to be associated with two to five metres of slip in a right-lateral oblique-reverse sense. A tentative average slip rate of 1 to 2 mm/y for the Holocene is inferred and the recurrence interval between events is probably between 1 and 5 ky. In comparison with the Mohaka Fault the Ruahine Fault may pose an overall lesser hazard to the power development sites on the Mohaka River (auth)
