Maunder, D.E. (ed.); Cowan, L. 2007 New Zealand seismological report 2001. Lower Hutt, N.Z.: GNS Science. GNS Science report 2007/12; Seismological Observatory bulletin E 185 214 p.
Abstract: This issue of the Seismological Observatory Bulletin is the final publication in a series stretching back to Bulletin E-1 in 1921. The availability of its information in a more convenient form on the internet has made the continuing publication of hypocentres, instrumentation details and networks unnecessary. Since July 2001, the GeoNet project has undertaken to upgrade, install and maintain a network of modern instruments and data centres to monitor earthquakes, volcanic unrest, land deformation, land stability, geothermal activity and tsunami in New Zealand. It is funded by the New Zealand Earthquake Commission (EQC) and is being designed, installed and operated by GNS Science. As part of its remit, all raw seismic data and earthquake hypocentres are freely available from the web site within one hour of their collection or determination. The entire catalogue of New Zealand hypocentres is available for searching and downloading from the GeoNet web site www.geonet.org.nz. The form of this Report follows lines established in recent years. The main list of regional shocks contains only earthquakes of magnitude 3.5 or greater located within 10° of Wellington, and smaller earthquakes known to have been felt in New Zealand. Many other earthquakes have however been assigned serial numbers, so the serial numbers of the shocks listed are often not consecutive. Phase data are not published here, but are instead sent to the International Seismological Centre, and appear in their bulletins, which constitute the only medium now in use for routine reporting of arrival time observations made in New Zealand. The lists of origin coordinates and magnitudes include sufficient supplementary information for assessment of the quality of the data on which they are based. There is also a list of origins of earthquakes in the Wellington area with magnitudes of 2.0 or more. This list gives less information on the quality of individual determinations, but the density of recording stations in the area and their easy accessibility for maintenance ensure that errors are small. (auth)