Properties of aftershock sequences

  • R. D. Adams Seismological Observatory, Wellington, New Zealand


Following the Inangahua earthquakes of May, 1968, the Seismological Observatory received many requests for information about aftershocks, and it became apparent that even among engineers and scientists in other fields there was considerable lack of knowledge of what to expect during an aftershock sequence. The following notes were therefore prepared, covering some of the points about which enquiries are most often received.


ADAMS R.D. and DIBBLE R.R., 1967: Seismological Studies of the Raoul Island Eruption, 1964. N.Z, Jl. Geol, Geophys. 10, 1348-61.

EIBY, G.A., 1966: Earthquake Swarms and Volcanism in New Zealand. Bull.Vol. 29, 61-73.

HAMILTON, R.M., 1966: The Fiordland Earthquake Sequence of 1960, and Seismic Velocities Beneath New Zealand. N.Z, Jl. Geol. Geophys. 9, 224-38.

HAMILTON, R.M., 1967: Mean Magnitude of an Earthquake Sequence. Bull. Seismol. Soc. Amer.57, 1115~6.

UTSU, T., 1961: A Statistical Study on the Occurrence of Aftershocks. Geophys. Mag. 30, 521 - 605.

How to Cite
Adams, R. D. (1968). Properties of aftershock sequences
. Bulletin of the New Zealand Society for Earthquake Engineering, 1(2), 113-115.