权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Detailed Gravity Anomaly Map in and around the Japanese Islands

日本列岛及其周边地区的详细重力异常地图

基本信息

批准号：
63540299
负责人：
KONO Yoshiteru
金额：
$ 1.09万
依托单位：
Kanazawa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

项目摘要

We compiled gravity data which were taken from various organizations in Japan. There are four groups of data source:The first is the data measured by ourselves during the last 15 years, numbering more than 10,000; The second is the data measured by the Geographical Survey Institute (GSI) and by the Hydrographic Department for geodetic purposes; The third is the data measured by university researchers for various academic purposes; and The fourth is the data measured by governmental exploration organizations such as the Geological Survey. The total number of data digitally compiled is about 500,000 points of which about 100,000 points are on land and 400,000 are at sea.Each data set is compared with the GSI's data set and both biases of gravity values and inaccuracy of gravimeter coefficients are examined. During these processes, incorrect or suspected data are either corrected or rejected from the data set. After these examination, all data are adjusted to the International Gravity Standardization Net 1971 (IGSN71) system.Using the data set thus obtained, we generate detailed gravity anomaly map in and around the Japanese Islands. The sap is prepared at a scale of 1:1,000,000 with a contour interval of 2 mgal. Colored (25 gradients) full size maps with an explanatory text and 30 transparent sheets which are indicating seismicity of the Japanese Islands has been published from the University of Tokyo Press.

我们收集了来自日本不同组织的重力数据。数据来源有四组：第一组是近15年来我们自己测量的数据，有1万多份；第二组是地理测量研究所和水文部门为大地测量目的测量的数据；第三组是大学研究人员为各种学术目的测量的数据；第四组是政府勘探机构如地质调查局测量的数据。数字化汇编的数据总数约为50万个点，其中约10万个点在陆地上，40万个点在海上。每个数据集都与GSI的数据集进行比较，并检查重力值的偏差和重力仪系数的不准确性。在这些过程中，不正确或可疑的数据将从数据集中更正或拒绝。经过这些检验，所有的数据都被调整到国际重力标准化网1971(IGSN71)系统。利用这样得到的数据集，我们生成了日本群岛及其周围的详细重力异常图。汁液按1：1,000,000的比例制备，等高线间隔为2 mgAl。东京大学出版社出版了彩色(25个梯度)全尺寸地图，其中有一份说明文字和30张表明日本群岛地震活动的透明纸。