Efforts to Recover and Digitize Analog Seismograms from Harvard‐Adam Dziewoński Observatory
Efforts to Recover and Digitize Analog Seismograms from Harvard‐Adam Dziewoński Observatory
复制标题
哈佛亚当·杰文斯基天文台模拟地震图的恢复和数字化工作
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Elena Bulat
中科院分区：
文献类型：
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作者：
M. Ishii;H. Ishii;Brenda Bernier;Elena Bulat
哈佛-亚当·杰文斯基天文台是美国学术上建立的最古老的地震台之一，由哈佛大学拥有和维护（Leet，1934）。它目前是美国地质调查局 (USGS) 阿尔伯克基地震实验室（网络代码 IU）运营的全球地震台网之一，也被 Quanterra, Inc. 用作新仪器的测试设施。哈佛地震台自 1988 年以来的数字数据可通过联合研究机构地震数据管理中心随时提供给科学界，并广泛用于各种研究目的。众所周知，该站的数据质量很高，部分原因是仪器安装在地下约 4.5 m 的拱顶中，确保减少表面噪音和稳定的环境（例如，几乎恒定的温度和湿度）。在这份手稿中，我们重点关注 1988 年之前在该站收集的模拟数据。
运营高质量地震台的愿景归功于哈佛大学教授 J. B. Woodworth，他于 1908 年开始使用地震仪器（Leet，1934）。最初，两台 Bosch-Omori 100 kg 水平摆地震仪安装在马萨诸塞州剑桥市哈佛自然历史博物馆大楼的地下室，这两台仪器一直运行到 1928 年。直到 1933 年 4 月，两台 Milne-Shaw 水平摆地震仪一直在这个位置进行地面运动监测。从那时起，似乎只有少数地震图幸存下来。 时期。 1933 年，在 L. Don Leet 的指导下，在马萨诸塞州哈佛大学的橡树岭天文台（也称为哈佛天文台）建造了一座新的地震观测站（图 1）（图 1），该观测站至今仍在使用（请注意，该观测站位于哈佛大学所在的马萨诸塞州剑桥西北约 40 公里处）。仪器开始记录地面运动……
The Harvard‐Adam Dziewonski observatory is one of the oldest seismic stations academically established in the United States, and it is owned and maintained by Harvard University (Leet, 1934). It is currently one of the Global Seismic Network stations operated by the U.S. Geological Survey (USGS)’s Albuquerque Seismological Laboratory (network code IU) and is also used as a testing facility for new instruments by Quanterra, Inc. The digital data from the Harvard seismic station since 1988 are readily available to the scientific community through the Incorporated Research Institutions for Seismology Data Management Center and are widely used for various research purposes. The data from this station are known to be of high quality, partly because the instruments are housed in a vault that is about 4.5 m below ground, ensuring reduced surface noise and a stable environment (e.g., nearly constant temperature and humidity). In this manuscript, we focus on the analog data that have been collected at this station prior to 1988.
The vision of operating a high‐quality seismic station is attributed to a Harvard professor, J. B. Woodworth, who began seismic instrumentation in 1908 (Leet, 1934). Initially, two Bosch–Omori 100 kg horizontal pendulum seismographs were installed in the basement of the Harvard Museum of Natural History building in Cambridge, Massachusetts, and the two instruments operated until 1928. Ground‐motion monitoring continued at this location with two Milne–Shaw horizontal pendulum seismographs until April 1933. Only a handful of seismograms appears to have survived from this time period. In 1933, under the direction of L. Don Leet, a new seismic observatory (Fig. 1), one that is used today, was constructed at the Oak Ridge Observatory, also known as Harvard Astronomical Observatory, at Harvard, Massachusetts (note that this is about 40 km northwest of Cambridge, Massachusetts, where Harvard University is located). Instruments began recording ground motion at …