PARTIAL SUPPORT OF THE INTERNATIONAL SEISMOLOGICAL CENTRE

这笔赠款可以继续部分支持国际地震中心的业务。ISC是由国际支持的，所要求的预算是基于赞助国的相对国内生产总值，其中美国的资金占这一时期估计运营成本的近20%。支持继续制作国际地震中心公报- -震源、震级和震源机制的明确全球摘要，以及台站到达时间、振幅和其他测量结果，并在可能的情况下与原始波形相联系。ISC的国际支持和非政府关系使该中心能够收集和自由分发来自否则无法获得的全球地震记录来源的数据。ISC公报支持全球地震学界进行地球结构、地震物理和减轻地震灾害的基础研究。《公报》还有助于监测《全面禁止核试验条约》。ISC数据产品，特别是观测到的到达时间、振幅和相关元数据的全球目录，是地球结构和震源机制基础研究的起点。这笔资金的支持将允许继续开发和改进地震事件参数，这些参数将在ISC公告中发布，并在网上提供，同时还将努力将目录扩展到1900年（前数字地震记录）和更低的震级阈值。改进后的地震事件记录将有助于提高对历史上全球地震活动的理解，并产生更好的地球内部结构模型，后者对于确定地震事件源机制、震级和位置至关重要，有助于全面禁止核试验条约的监测。ISC产品对于在十年时间尺度上保持明确准确的地震事件来源至关重要，并有助于改善全球的抗震土木工程。需要支持的具体任务包括：1)持续收集、自动合并和关联来自世界各地网络和数据中心的报告公告数据，包括国家地震信息中心（NEIC）、USArray、全面禁止核试验条约办公室（CTBTO）、日本气象厅（JMA）等；2)人工审查震源、相位读数以及几个网络同时报告的大约3.5级及以上地震的相关数据；3)通过网络搜索、ftp、cd - rom和印刷的ISC公报摘要等方式分发ISC公报；4)与美国地质调查局运营的国家地震信息中心合作，并与数字地震台网联合会（FDSN）协调，维护和重新发展国际地震台站登记；5)国际地震和地球内部物理学会（IASPEI）参考事件集（GT0-5）的维护和更新；6)部分支持扩展iscc - gem全球仪器地震目录——用于全球和区域地震危险性评估的最均匀的全球长期目录；7)维护和扩展ISC事件书目，允许快速检索有关全球重大地震事件的文献

This grant allows for renewed partial support of operations of the International Seismological Centre (ISC). The ISC is internationally supported and the requested budget is based on the relative GDPs of sponsor countries with funding from the U.S. near 20% of the estimated operational costs over this period. Support provides for continued production of the ISC Bulletin - the definitive global summary of earthquake hypocentres, magnitudes and source mechanisms, as well as station arrival times, amplitudes and other measurements with links to original waveforms where available. The international supported and non-governmental affiliation of the ISC allows the Centre to collect and freely distribute data from otherwise unavailable sources of global seismic recordings. The ISC Bulletin supports the global seismology community for fundamental research on Earth structure, earthquake physics and earthquake hazards mitigation. The Bulletin also aids in monitoring of the Comprehensive Test Ban Treaty. ISC data products, in particular the global catalog of observed arrival times, amplitudes, and associated meta data, are a starting point for fundamental studies of Earth structure and earthquake source mechanisms. Support under this grant will allow for continued development and refinement of seismic event parameters that are published in the ISC bulletin and available on line as well as new efforts to extend the catalog back in time to the 1900 (pre-digital seismic recordings) and to a lower magnitude threshold. The improved seismic event records will allow for improved understanding of historical global seismicity and lead to better models of Earth's interior structure, the later critical to identifying seismic event source mechanisms, magnitudes and locations that aid in comprehensive nuclear test ban treaty monitoring. ISC products are critical to maintaining definitive accurate seismic event provenance over decadal time scales and contribute to improved earthquake resistant civil engineering globally. Specific tasks to be supported include: 1) ongoing collection, automatic merging and association of reported bulletin data from networks and data centers around the world, including National Earthquake Information Center (NEIC), USArray, Comprehensive Test Ban Treaty Office (CTBTO), Japanese Meteorological Agency (JMA) etc.; 2) manual review of hypocentres, phase readings, and related data for events simultaneously reported by several networks approximately of magnitude 3.5 and above; 3) distribution of the ISC Bulletin by means of the web-search, ftp, CD-ROMs and the printed ISC Bulletin Summary; 4) maintenance and re-development of the International Seismograph Station Registry jointly with the National Earthquake Information Center operated by the US Geological Survey and in coordination with the Federation of Digital Seismograph Networks (FDSN); 5) maintenance and update of the International Association of Seismology and Physics of the Earth's Interior (IASPEI) Collection of Reference Events (GT0-5); 6) partial support for extension of the ISC-GEM Global Instrumental Earthquake Catalogue -- the most homogeneous global long-term catalog used for global and regional seismic hazard assessment; and 7) maintenance and extension of the ISC Event Bibliography, which allows for rapid literature searches pertaining to significant global seismic events.***