臺灣博碩士論文加值系統

自然界中的大多數現象都和其數量和規模有關，我們可以利用這種關係來釐清其發展的過程。在這個研究中，我們調查了2002年5月至2004年4月在南極Erebus火山記錄的278次震顫事件的持續時間與振幅的分佈。我們計算減少的位移（

Most phenomena in nature show a relationship between their numbers and their sizes. This relationship can be used to identify their source processes. In this respect, we investigate duration-amplitude distribution for 278 tremor events during May 2002-April 2004 recorded at Erebus volcano, Antarctica. We compute reduced displacement (

摘要 ........................................................................................................................................... ii
ABSTRACT .............................................................................................................................. ii
ACKNOWLEDGEMENTS .................................................................................................... iii
TABLE OF CONTENTS ........................................................................................................ iv
LIST OF FIGURES ................................................................................................................. vi
LIST OF TABLES .................................................................................................................. vii
Chapter 1
INTRODUCTION .................................................................................................................... 1
1.1 The nature of volcanic tremor .......................................................................................... 1
1.2 Mt. Erebus volcano ........................................................................................................... 2
1.3 Aim and the structure of this thesis .................................................................................. 4
Chapter 2
DATA AND SPECTRAL ANALYSIS .................................................................................... 9
2.1 Seismic network ............................................................................................................... 9
2.2 Data pre-processing .......................................................................................................... 9
2.3 Spectral Analysis ............................................................................................................ 10
Chapter 3
DURATION-AMPLITUDE SCALING ............................................................................... 18
3.1 Methodology ................................................................................................................... 18
3.2 Results ............................................................................................................................ 20
Chapter 4
DISCUSSION AND CONCLUSIONS .................................................................................. 32
4.1 Statistical comparison of characteristic amplitudes........................................................ 32
4.2 Possible physical sources of tremor at Erebus ............................................................... 34
4.3 Conclusions .................................................................................................................... 37
REFERENCES ....................................................................................................................... 42
APPENDIX A
Tremor catalogue and fitting results .................................................................................... 45

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