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全世界地球物理活动的可靠资料很难获得。SEG每年汇编由承包商、石油和矿产公司及政府机构提供的地球物理勘测情况,但这些统计数据只在北美、西欧、澳大利亚以及亚洲和拉丁美洲的一部分地区是比较准确的,它不包括不向外界公布类似数据的社会主义国家(苏联、中国、东欧)。本报告对发展中国家是不完善的,它们的一些勘测活动由政府和当地公司进行。年度的勘测数据分析集中于所采用的地球物理技术、花费、公里数和单位成本,同时也逐年作了对比。图1的左幅是六个地区地球物理总支出,美国和加拿大合并在一起,墨西哥和南美合称拉丁美洲,中东和远东包括在亚洲内。
Reliable data on geophysical activity around the world is difficult to obtain. Each year, SEG compiles geophysical surveys provided by contractors, oil and mineral companies, and government agencies, but these statistics are only accurate in North America, Western Europe, Australia, and parts of Asia and Latin America. It does not include The outside world publishes data-like socialist countries (Soviet Union, China, Eastern Europe). This report is not perfect for developing countries. Some of their survey activities are conducted by the government and local companies. The annual survey data analysis focuses on the geophysical technology used, the cost, the number of kilometers, and the unit cost, and also makes comparisons year after year. The left picture in Figure 1 shows the total geophysical expenditures in the six regions. The United States and Canada merged together. Mexico and South America are collectively referred to as Latin America, and the Middle East and Far East are included in Asia.