Hurst, A.W.; Dibble, R.R. 1976 Repeat gravity measurements on Ruapehu, 1970-1974. [s.l.]: [s.n.]. Report / Geophysics Division 100 23 p.
Abstract: Five gravity surveys have been made on Ruapehu during the period 1970-1974 to try to detect gravitational changes caused by volcanic activity. The smallest gravitational change which could reliably be detected was 0.5 micro N/kg but no change larger than this was observed. (auth.)