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瑞典有两个著名的地震和地下核爆炸观测机构,即乌普萨拉地震研究所和哈格福尔斯观测所。它们经常及时而准确地宣布苏美地下核试验的地点、当量和震级。乌鲁萨拉地震研究所是一个地震观测,研究和教学相结合的机构。它人员不多,目前包括它的外地观测员在内只有十三人。占地不大,经费有限,一九七八年只有二十万美元。仪器并不是世界上最先进的,一台维尔特式水平向地震仪已使用七十五年。但是,它的观测工作却是准确及时的,观测结果为世界各国所广泛采用。原因何在呢?除了瑞典良好的基岩(花岗岩、斑岩)和比
There are two well-known earthquake and underground nuclear explosive observatories in Sweden, the Uppsala Earthquake Research Institute and the Haggfors Observatory. They often promptly and accurately declare the location, equivalence and magnitude of Soviet nuclear tests in the United States. Ulusala Earthquake Research Institute is a combination of seismic observation, research and teaching. It is small in staffing and currently includes only 13 field observers. Small footprint, limited funding, only two hundred thousand U.S. dollars in 1978. The instrument is not the most advanced in the world, and a Wilt horizontal seismometer has been in use for seventy-five years. However, its observations are accurate and timely. The observations have been widely adopted by all countries in the world. What is the reason? In addition to Sweden’s good bedrock (granite, porphyry) and ratio