The Current State of Seismic Monitoring in Puerto Rico
The Current State of Seismic Monitoring in Puerto Rico
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波多黎各地震监测现状
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
J. M. Cruzado
中科院分区：
文献类型：
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作者：
J. Clinton;G. Cua;V. Huerfano;C. V. Hillebrandt;J. M. Cruzado
美国联邦波多黎各有380万人口（2000年人口普查），人口密度高于美国任何一个州。该岛东西长约160公里，南北长约50公里，四面都是近海活动断层。在有记录的历史中，许多M > 7.0的地方和区域性事件，其中一些已经产生了海啸，对当地基础设施造成了广泛的破坏，尽管最后一次重大的地面运动是在1918年。美国地质调查局的灾害地图（Mueller等人，2003年）表明，地震灾害与美国西部的盆地和山脉省相似，根据波多黎各现行标准建筑规范（1997年UBC），该岛被指定为地震带3。巨大的危险，加上人口众多和未经考验的基础设施，对波多黎各造成了潜在的破坏性组合。在发生大地震时作出有效的应急反应，对于尽量减少由此造成的人命损失和生命线系统的中断至关重要。对这种灾害作出适当反应的第一步是及时了解大地震的震级、位置和预期的地面震动和破坏模式。这就需要一个现代化的密集地震网络，不仅能够记录不饱和的地震地面运动，而且还能够真实的实时记录，然后提供可供紧急服务和整个社区使用的近即时分析数据。
该岛的地震活动，以及整个加勒比地区的东北部（包括美国和英属维尔京群岛），由波多黎各地震网络（PRSN）和波多黎各强运动计划（PRSMP）联合监测，两者都在波多黎各大学内运作。
The U.S. Commonwealth of Puerto Rico has a population of 3.8 million (2000 Census), a higher population density than any U.S. state. The island, approximately 160 km east to west by 50 km north to south, is bounded by offshore active faults on all sides. Numerous local and regional events in the recorded history with M > 7.0, some of which have generated tsunamis, have caused extensive damage to local infrastructure, though the last significant ground motions were felt onshore in 1918. The U.S. Geological Survey hazard maps (Mueller et al. 2003) indicate that the seismic hazard is similar to the Basin and Range province in the Western United States, and the island is assigned Seismic Zone 3 in the current standard building code in Puerto Rico, the 1997 UBC. The significant hazard, combined with the large population and untested infrastructure, results in a potentially devastating combination for Puerto Rico. Efficient emergency response in the event of a large earthquake will be crucial to minimizing the resultant loss of human life and disruption of lifeline systems. The first step in providing an appropriate response to such a disaster is a timely knowledge of the magnitude, location, and expected ground shaking and damage patterns from a large earthquake. This requires a modern and dense seismic network, capable of not only recording the earthquake ground motion without saturation but also doing so in real time and then providing data for near-immediate analysis that can be made available to emergency services and the community at large.
The seismicity of the island, as well as the northeastern Caribbean region in general (including the U.S. and British Virgin Islands), is monitored jointly by the Puerto Rico Seismic Network (PRSN) and the Puerto Rico Strong Motion Program (PRSMP), both operating within the University of Puerto Rico …