Amplitude domain analysis for the 30 August 1986 Vrancea intermediate earthquake     

Luminiţa Ardeleanu  Victoria Oancea 《Natural Hazards》1990,3(3):305-314

The amplitude domain analysis applied to the major Vrancea (Romania) earthquake of 30 August 1986 leads to the determination of some parameters characterizing the amplitude and the time duration of the signal.Digital three-component acceleration data, obtained at 10 Romanian seismic stations with epicentral distances between 40 and 200 km, are used. The results are compared with those obtained by Schenk for strong Californian earthquakes.Paper presented in the 21st General Assembly of the European Seismological Commission, Sofia, 1988.  相似文献   

Statistical Models of the Seismicity of the Vrancea Region, Romania     

Luminiţa Ardeleanu 《Natural Hazards》1999,19(2-3):151-164

A parameterization derived from the Weibull distribution is used to model the seismic activity of the Vrancea region.The analysis of 498 crustal earthquakes with local magnitudes greater than 2.0, and 1377 subcrustal events with local magnitudes greater than 2.5 emphasizes that the shallow sequences show a strong clustering tendency, while the intermediate depth mainshock sequences are modeled by a completely random pattern in space and time. These results are not influenced by the magnitude threshold and the width of the time window.The difference between the seismicity patterns in the crust and in the subcrustal zone correlates with the difference between the stress field within these two regions.  相似文献