We have investigated the possible cause-and-effect relationship due to stress transfer between two earthquakes that occurred near Christchurch, New Zealand, in September 2010 and in February 2011. The Mw 7.1 Darfield (Canterbury) event took place along a previously unrecognized fault. The Mw 6.3 Christchurch earthquake, generated by a thrust fault, occurred approximately five months later, 6 km...

This paper presents a procedure of establishing the discrete equations of motion for a structure via wavelet packet method from its measured responses and inputs. Then, the natural frequencies, damping ratios and mode shapes of the structure can be directly determined. The proposed procedure is applied to process the acceleration responses of a five-story steel frame, subjected to 8%, 20%, 40%,...

The frictional resistance on a fault during slip controls earthquake dynamics. Friction dissipates heat during an earthquake; therefore, the fault temperature after an earthquake provides insight into the level of friction. The Japan Trench Fast Drilling Project (Integrated Ocean Drilling Program Expedition 343 and 343T) installed a borehole temperature observatory 16 months after the March 201...

Objective: “5.12” Wenchuan Earthquake killed 70,000 people and left more than 90,000 people injured seriously. This study was to analyze the wound features and early treatments in Wenchuan earthquake victims and investigate treatment strategies in major disasters, to provide a reference to future disaster rescue. Methods: Total of 1420 earthquake patients who were admitted to Deyang People’s Ho...

Natural disasters cause human losses, destroy economic assets and are often followed by widespread looting and increases in altruistic behaviour; affecting ambiguously the long-term benefits and costs of crime. This study investigates whether the multiple consequences of natural disasters lead to lasting changes in property crime rates through assessing the effect on property crime dynamics of ...

The 2004 Great Sumatra-Andaman earthquake had an average source duration of about 500 sec. and a rupture length of 1 ,200–1,300 km. The seismic moment, M0, determined with a finite source model, was 6.5 1022 N-m, which corresponds to Mw=9.18. Allowing for the uncertainties in the current M0 determinations, Mw is in the range of 9.1 to 9.3. The tsunami magnitude Mt is 9.1, suggesting that the ov...

[1] Using Global Positioning System (GPS) data from sites near the 16 Oct. 1999 Hector Mine, California earthquake, Pulinets et al. (2007) identified anomalous changes in the ionospheric total electron content (TEC) starting one week prior to the earthquake. Pulinets (2007) suggested that precursory phenomena of this type could be useful for predicting earthquakes. On the other hand, and in a s...

A realistic numerical simulation model for all physical processes underlying the earthquake phenomenon on HPC's would provide a powerful tool to study fault behavior and earthquake nucleation. The microphysical particle-based Lattice Solid Model (LSM) currently being developed at QUAKES provides a basis on which to construct such a model. Presently, the model simulates stress transfer, seismic ...

The Rat Island earthquake of February 4, 1965 (origin time 05h 01m 21.8s, h = 40 km), is one of the largest earthquakes recorded in recent years. On the basis of the radiation patterns and the amplitudes of the great circle Rayleigh and Love waves, the earthquake is found to have the following characteristics: fault plane dip, 18ø; fault plane dip direction, N19øE; rupture propagation direction...

OBJECTIVE Previous reports suggest that maternal exposure to acute stress related to earthquakes affects the sex ratio at birth. Our aim was to examine the change in sex ratio at birth after Eastern Marmara earthquake disasters. MATERIAL AND METHODS This study was performed using the official birth statistics from January 1997 to December 2002 - before and after 17 August 1999, the date of th...