Strong ground motions recorded during earthquakes of May the 11th and 19th, 1962 in Mexico City

1964 ◽  
Vol 54 (1) ◽  
pp. 209-231
Author(s):  
Leonardo Zeevaert
Keyword(s):  
Mexico City ◽  
Ground Motions ◽  
Soft Clay ◽  
Response Spectra ◽  
The Other ◽  
Soil Conditions ◽  
Strong Ground Motions ◽  
Multistory Building ◽  
Local Soil ◽  
Strong Ground

abstract The ground accelerations during the earthquakes of May 11 and 19, 1962 were recorded in Mexico City on a soft clay bed that was formerly the floor of an old lake. Records were obtained from two accelerometers, one instrument was located in the basement of a multistory building and the other was located in a nearby park. Response spectra of the ground motions are presented and analysis is made of the local soil conditions with the view to explaining the characteristics of the spectrums.

A simple model for strong ground motions and response spectra

1988 ◽  
Vol 16 (2) ◽  
pp. 203-215 ◽  
Author(s):  
Erdal Safak ◽  
Charles Mueller ◽  
John Boatwright
Keyword(s):  
Simple Model ◽  
Ground Motions ◽  
Response Spectra ◽  
Strong Ground Motions ◽  
Strong Ground

scholarly journals Near-source strong ground motions observed in the 22 February 2011 Christchurch earthquake

2011 ◽  
Vol 44 (4) ◽  
pp. 181-194 ◽  
Author(s):  
Brendon A. Bradley ◽  
Misko Cubrinovski
Keyword(s):  
Surface Waves ◽  
Site Response ◽  
Ground Motions ◽  
Response Spectra ◽  
Critical Examination ◽  
Acceleration Response ◽  
Strong Ground Motions ◽  
Nonlinear Site Response ◽  
Acceleration Response Spectra ◽  
Strong Ground

This manuscript provides a critical examination of the ground motions recorded in the near-source region resulting from the 22 February 2011 Christchurch earthquake. Particular attention is given to reconciling the observed spatial distribution of ground motions in terms of physical phenomena related to source, path and site effects. The large number of near-source observed strong ground motions show clear evidence of: forward-directivity, basin generated surface waves, liquefaction and other significant nonlinear site response. The pseudo-acceleration response spectra (SA) amplitudes and significant duration of strong motions agree well with empirical prediction models, except at long vibration periods where the influence of basin-generated surface waves and nonlinear site response are significant and not adequately accounted for in empirical SA models. Pseudo-acceleration response spectra are also compared with those observed in the 4 September 2010 Darfield earthquake and routine design response spectra used in order to emphasise the amplitude of ground shaking and elucidate the importance of local geotechnical characteristics on surface ground motions. The characteristics of the observed vertical component accelerations are shown to be strongly dependent on source-to-site distance and are comparable with those from the 4 September 2010 Darfield earthquake, implying the large amplitudes observed are simply a result of many observations at close distances rather than a peculiar source effect.

Strong-Motion Records Obtained by an Array Observation System During the 2011 Great East Japan Earthquake

2012 ◽  
Vol 7 (6) ◽  
pp. 672-681 ◽  
Author(s):  
Makoto Kamiyama ◽  
◽  
Tadashi Matsukawa ◽  
Masahiro Anazawa
Keyword(s):  
Ground Motions ◽  
Strong Motion ◽  
Great East Japan Earthquake ◽  
Observation System ◽  
Soil Conditions ◽  
Severe Damage ◽  
Local Site Effects ◽  
Strong Ground Motions ◽  
Local Site ◽  
Strong Ground

Small-Titan, an array system deployed in Sendai City and used for observing strong ground motion succeeded in obtaining strong ground motions at many sites during the 2011 Great East Japan Earthquake. Small-Titan installed in 1998 to investigate local site effects on strong ground motions consists of 20 observation sites with different soil conditions and has obtained over 500 records of various kinds of earthquakes since its installation. The 2011 Great East Japan Earthquake caused severe damage in Sendai City, including that from a tsunami. One site of the Small-Titan system was also hit by a tsunami. This paper describes the background leading to the success of the records of observation of strong motion by Small-Titan for this earthquake and outlines characteristics of records.

Analyses of earthquake ground motions at Japanese sites

1970 ◽  
Vol 60 (6) ◽  
pp. 2057-2070
Author(s):  
F. W. Kiefer ◽  
H. Bolton Seed ◽  
I. M. Idriss
Keyword(s):  
Ground Motions ◽  
Ground Surface ◽  
Response Spectra ◽  
Soil Conditions ◽  
Mass Analysis ◽  
Lumped Mass ◽  
Ground Response ◽  
Maximum Acceleration ◽  
Soil Layers ◽  
Local Soil

Abstract Ground motions at several Japanese sites are evaluated using recently-developed techniques which involve assessing the base-rock motion at the site due to an earthquake, establishing the properties of the overlying soil layers, and computing the response at the ground surface using a lumped-mass-analysis procedure. The maximum acceleration and the form of the response spectra for ground motions recorded at the several sites agree reasonably well with the computed values. It is concluded that where the soil conditions can be reliably determined, the analytical procedures offer good promise as a means of considering the effects of local soil conditions in the prediction of ground response.

The Mexico Earthquake of September 19, 1985—Relationships between Soil Conditions and Earthquake Ground Motions

1988 ◽  
Vol 4 (4) ◽  
pp. 687-729 ◽  
Author(s):  
H. B. Seed ◽  
M. P. Romo ◽  
J. I. Sun ◽  
A. Jaime ◽  
J. Lysmer
Keyword(s):  
Shear Wave ◽  
Mexico City ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Ground Motions ◽  
Probabilistic Approach ◽  
General Nature ◽  
Soil Conditions ◽  
Ground Response ◽  
Local Soil

Comparisons are presented between the characteristics of ground motions at five sites underlain by clay at which ground motions were recorded in Mexico City in the earthquake of September 16, 1985 and for which analyses of ground response have been made, based on the measured properties of soils and the motions recorded on hard formations at the National University of Mexico. It is shown that the ground response in areas of Mexico City underlain by clay is extremely sensitive to small changes in the shear wave velocity of the clay and it is suggested that a probabilistic approach which allows for uncertainties in shear wave velocity measurements and in the characteristics of the motions on the hard formations is desirable to assess these effects. Based on the results of such an approach it is concluded that simple ground response analyses can provide very useful data for engineering assessments of the effects of local soil conditions on the characteristics of ground motions likely to develop at sites underlain by soft clays, and that the use of these procedures also provides a useful basis for estimating the general nature of the ground motions in the extensive heavy damage zone of Mexico City in the 1985 earthquake.

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