2014 Fiscal Year Final Research Report
Relation between statistical parameters of seismicity and mechanical quantities as probed by numerical models
| Project/Area Number |
24340091
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Partial Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Mathematical physics/Fundamental condensed matter physics
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
HORI Takane 海洋研究開発機構, 地震津波海域観測研究開発センター, グループリーダー代理 (00359176)
KUWANO Osamu 海洋研究開発機構, 数理科学先端技術研究分野, 研究員 (30511969)
|
|---|
| Project Period (FY) |
2012-04-01 – 2015-03-31
|
| Keywords | 大森則 / グーテンベルク・リヒター則 |
|---|
| Outline of Final Research Achievements |
Although earthquake is a complex phenomenon with apparent diversity, their statistical laws are sometimes very simple and universal.Parameters for these statistical laws exhibit spatio-temporal fluctuations. Most interestingly, it has been well known that certain parameters may change prior to a major earthquake. However, there is no reason to believe that such precursory phenomena are universal or necessary. In addition, there is no quantitative criterion to judge "anomaly" in such fluctuations. To understand the necessity of these fluctuations of parameters, we construct some "forward models" that can reproduce statistical seismicity and obtain quantitative expressions for parameters in terms of mechanical properties of earthquake faults. Comparison with observations and other results on similar models are still semi-quantitative, but promising in some aspects, for example the shear stress dependence of the c-value in the Omori-Utsu law.
|
| Free Research Field |
統計物理、非線形地殻物理
|
