Seismic Hazard Assessment in Armenia

An evaluation of seismic hazard assessment in the territory of Armenia is presented in this work. The catastrophic M = 7.0 Spitak earthquake in 1988 revealed the drawbacks of the acting seismic zoning map. Two seismic hazard maps have been compiled in NSSP RA during 1991–1996. The deterministic approach was applied in the first one and the probabilistic in the second one. Both maps were compiled on the basis of the same database. Comparison between the maps shows good correlation. This revised version was published online in June 2006 with corrections to the Cover Date.     

Seismic Risk Assessment for the Territory of Armenia and Strategy of its Mitigation

The original methods of seismic risk assessment based on the main factors, defining the high level of seismic risk in Armenia, are used in this paper. Based on the analysis carried out, an assessment is made about the fact, that the capital of Armenia, Yerevan, is the most risk exposed area. A strategy for seismic risk reduction, derived from local peculiarities and the level of seismic risk, is presented. Improving the resisting of existing buildings and constructions to seismic damage, based on the grounds of new technologies elaborated by NSSP RA, is emphasised in this strategy.     

Earthquakes induced by deep penetrating bombing

Introduction The phenomenon of induced seismicity is one of the most widely discussed issues in modern seismology. Many aspects of this problem, particularly remote earthquakes triggered by strong physical impacts on the lithosphere (other strong earthquakes or underground nuclear explosions) are still controversial, and need further elaboration (Console, Nikolaev, 1994). In this paper I discusses remotely triggered seismicity by using observations of seismicity with M≥5.0 (in accordance wi…     

The New Seismic Zonation Map for the Territory of Armenia

In the present work a new, deterministic, seismic zonation map for the territory of Armenia is presented. It has been compiled on the basis of the newest seismological, geological and geophisical data. Creation of the map included: determination of a seismic hazard area for the territory of Armenia; compilation of a map of active faults; identification of active blocks; identification of seismic source zones; calculation of a seismic effect from the seismic source zones (SSZs). Seismic effect on the Earth's surface from the singled out SSZs is calculated in the form of an intensity of seismic influences expressed in units of MSK-64 scale, and horizontal soil accelerations expressed in fractions of gravity force acceleration (g). The map compiled will allow comparison between the deterministic model with a probabilistic seismic zonation model for the territory of Armenia (in preparation), in order to analyze the western and eastern standards of seismic hazard assessment on the basis of the same complete data base.     

Computation of Probabilistic Seismic Hazard for the GHSAP Test Area ‘Caucasus’

As a result of work carried out during the first two stages of the Global Seismic Hazard Assessment Program (GSHAP) for the Test Area Caucasus, a uniform earthquake catalogue was compiled and a Seismic Source Zones Model was designed. At the final stage of the program, the computation of seismic hazard was done by different methods.The results of a computation done using the Probabilistic Seismic Hazard Assessment methodology, as well as primary intermediate steps and preparatory work are given in the present paper. Peak horizontal ground acceleration is chosen as the parameter representing seismic hazard. Final computer calculations were done with the SEISRISK III program. The two final Seismic Hazard maps for different return periods are presented. The work was carried out at the National Survey for Seismic Protection of the Republic of Armenia.     

钻地炸弹爆炸诱发了地震？

提供4次钻地炸弹爆炸前、 后各一年内在离爆点分别为500 km和1 000 km范围内发生的Mge;5地震的活动情况. 4次爆炸分别为1999年南斯拉夫科索沃的爆炸、 1991年伊拉克巴格达的爆炸、 2001年阿富汗托拉波拉的爆炸和2003年伊拉克基尔库克的爆炸. 地震活动资料表明钻地炸弹爆炸可能触发了一些远处的地震. 在地震活动区应该禁止进行钻地炸弹爆炸.