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Geophysical modelings of co- and postseismic gravity changes from satellite gravimetry
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| Title: | Geophysical modelings of co- and postseismic gravity changes from satellite gravimetry |
| Other Titles: | 衛星重力観測に基づいた地震時及び地震後重力変化の地球物理学的なモデル構築 |
| Authors: | 田中, 優作 Browse this author |
| Issue Date: | 23-Mar-2017 |
| Publisher: | Hokkaido University |
| Abstract: | pace geodesy is a practice in which we perform geophysic al studies based on geodetic data observed using space techniques. It has been providing large advances to various disciplines in earth and environmental sciences . S ome of them comes from satellite gravimetry . For example, the earth’s static global gravity field has been a target of space geode tic studies since its earl y age, and first space geodetic determination of the flattering of the earth dates back to 1950s. The GRACE (Gravity Recovery And Climate Experiment) satellite system, launched in 2002 , ha s enabled us to track the time - variable gravity field with sp at ial resolution of ~ 300 km and the temporal resolution of ~ 30 days. There are numbers of geophysica l phenomena accompanying mass redistribution and consequent chang es in the gravity field . T racking such changes help us investigate physical processes governing the phenomena . An e arthquake also causes mass re distribution, and has been a scientific targe t of time - variable gravity studies . Th e present study aims at find ing new insights into physical processes associated with earthquakes through the analysis of gravity changes and providing an overview on earthquake - origin gravity changes. This thesis is separated into seven chapters . In Chapters 1 – 6 , I give detail ed seismolog ical studies made by analyzing GRACE data . In Chapter 7 , I conclude th e thesis. Summaries of Chapters 1 – 6 are given below. |
| Conffering University: | 北海道大学 |
| Degree Report Number: | 甲第12694号 |
| Degree Level: | 博士 |
| Degree Discipline: | 理学 |
| Examination Committee Members: | (主査) 教授 日置 幸介, 教授 古屋 正人, 教授 村上 亮, 准教授 高田 陽一郎 |
| Degree Affiliation: | 理学院（自然史科学専攻） |
| Type: | theses (doctoral) |
| URI: | http://hdl.handle.net/2115/65408 |
| Appears in Collections: | 課程博士 (Doctorate by way of Advanced Course) > 理学院(Graduate School of Science)
学位論文 (Theses) > 博士 （理学）
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