Strong ground motion characteristics observed in the 4 September 2010 Darfield, New Zealand earthquake

2012 ◽  
Vol 42 ◽  
pp. 32-46 ◽  
Author(s):  
Brendon A. Bradley
Keyword(s):  
New Zealand ◽  
Ground Motion ◽  
Strong Ground Motion ◽  
Motion Characteristics ◽  
Strong Ground

The importance of surface waves in strong ground-motion

1977 ◽  
Vol 10 (4) ◽  
pp. 170-173
Author(s):  
W. D. Smith
Keyword(s):  
New Zealand ◽  
Surface Waves ◽  
Ground Motion ◽  
Rayleigh Waves ◽  
Regional Variation ◽  
Strong Ground Motion ◽  
Focal Depth ◽  
Qualitative Explanation ◽  
S Wave ◽  
Strong Ground

Surface waves, when present in strong ground-motion, may contribute more to the Modified Mercalli intensity and to damage than does the S wave, even if the S wave contains higher accelerations. This gives a qualitative explanation for the observed regional variation in the felt effects of earthquakes in New Zealand, by assuming a regional variation in the predominant focal depth and hence in the amplitudes of the Love and Rayleigh waves that are excited.

scholarly journals Computer processing of New Zealand strong-motion accelerograms

1983 ◽  
Vol 16 (3) ◽  
pp. 234-246
Author(s):  
S. B. Hodder
Keyword(s):  
New Zealand ◽  
Ground Motion ◽  
Strong Ground Motion ◽  
Processing System ◽  
Strong Motion ◽  
Computer Processing ◽  
Band Pass ◽  
New Processing ◽  
Earthquake Accelerograms ◽  
Strong Ground

Recently implemented modifications to the computer processing of earthquake accelerograms are described. The main extensions to the system include dynamic instrument correction, robust band-pass filtering and accurate integration, all implemented in the frequency domain. The processed records now provide accurate representations of strong ground motion within the frequency band from 0.25 Hz to 24.5 Hz: full accuracy is maintained in the computed velocity and displacement signals. The use of the new processing system is demonstrated using two previously recorded accelerograms.

Strong Motion Attenuation Relations: A Ten-Year Perspective

1985 ◽  
Vol 1 (4) ◽  
pp. 759-804 ◽  
Author(s):  
Kenneth W. Campbell
Keyword(s):  
Ground Motion ◽  
Earthquake Engineering ◽  
Strong Ground Motion ◽  
Strong Motion ◽  
The United States ◽  
Attenuation Relations ◽  
Empirical Prediction ◽  
Motion Data ◽  
Motion Characteristics ◽  
Strong Ground

Research on strong ground-motion characteristics conducted in the United States within the last 10 years (1974-1984) forms the basis for a detailed discussion of important factors to be considered when selecting or developing strong-motion attenuation relations for use in earthquake engineering and seismic hazard studies. While emphasis is placed on the empirical prediction of ground-motion amplitudes, a brief discussion of procedures is presented that can be used when insufficient strong-motion data are available to perform an adequate statistical analysis. The discussion is followed by a tabulated summary of selected strong-motion attenuation relations proposed and developed in the last 10 years (1974-1984) to acquaint the reader with the types of relationships currently available.

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