Fluid Distribution Along the Nankai-Trough Megathrust Fault off the Kii Peninsula

Inferred from Receiver Function Analysis

Nonfiction, Science & Nature, Science, Earth Sciences, Geophysics
Cover of the book Fluid Distribution Along the Nankai-Trough Megathrust Fault off the Kii Peninsula by Takeshi Akuhara, Springer Singapore
View on Amazon View on AbeBooks View on Kobo View on B.Depository View on eBay View on Walmart
Author: Takeshi Akuhara ISBN: 9789811081743
Publisher: Springer Singapore Publication: February 22, 2018
Imprint: Springer Language: English
Author: Takeshi Akuhara
ISBN: 9789811081743
Publisher: Springer Singapore
Publication: February 22, 2018
Imprint: Springer
Language: English

This thesis explores fluid distribution along the Nankai-Trough megathrust fault around the Kii Peninsula of Japan, where devastating earthquakes are expected to occur in the near future. Exploring fluid distribution along subduction zones is an important issue because the fluid is considered to control the occurrence of earthquakes. One of the effective strategies to estimate fluid content is retrieving receiver functions (RFs) from seismograms, but in the case of ocean-bottom seismometers (OBSs), noisy P-wave reverberations within the seawater column make such an analysis difficult. The author therefore developed a novel technique to suppress the water reverberations, which allows obtaining the fluid distribution data along a wide depth range on the plate interface.

  This thesis first presents the new technique, called the water layer filter method, and demonstrates its efficiency by using both synthetic and observation data. Then, using the method, a receiver function image of the Philippine Sea Plate is constructed to reveal dehydration processes of the subducting oceanic crust around the Kii Peninsula. Finally, the author performs high-frequency receiver function inversion analysis. The results indicate the presence of a thin fluid-rich sediment layer along the megathrust fault off the Kii Peninsula that acts as a pathway of fluid.

    Nowadays, the number of offshore observations is increasing worldwide. In this respect, the attempt to better analyze OBS data employing the new method will become more important in future studies.

View on Amazon View on AbeBooks View on Kobo View on B.Depository View on eBay View on Walmart

This thesis explores fluid distribution along the Nankai-Trough megathrust fault around the Kii Peninsula of Japan, where devastating earthquakes are expected to occur in the near future. Exploring fluid distribution along subduction zones is an important issue because the fluid is considered to control the occurrence of earthquakes. One of the effective strategies to estimate fluid content is retrieving receiver functions (RFs) from seismograms, but in the case of ocean-bottom seismometers (OBSs), noisy P-wave reverberations within the seawater column make such an analysis difficult. The author therefore developed a novel technique to suppress the water reverberations, which allows obtaining the fluid distribution data along a wide depth range on the plate interface.

  This thesis first presents the new technique, called the water layer filter method, and demonstrates its efficiency by using both synthetic and observation data. Then, using the method, a receiver function image of the Philippine Sea Plate is constructed to reveal dehydration processes of the subducting oceanic crust around the Kii Peninsula. Finally, the author performs high-frequency receiver function inversion analysis. The results indicate the presence of a thin fluid-rich sediment layer along the megathrust fault off the Kii Peninsula that acts as a pathway of fluid.

    Nowadays, the number of offshore observations is increasing worldwide. In this respect, the attempt to better analyze OBS data employing the new method will become more important in future studies.

More books from Springer Singapore

Cover of the book Sustainability and Social Responsibility: Regulation and Reporting by Takeshi Akuhara
Cover of the book Toleration by Takeshi Akuhara
Cover of the book Smart Intelligent Computing and Applications by Takeshi Akuhara
Cover of the book Disaster Governance in Urbanising Asia by Takeshi Akuhara
Cover of the book The Middle and Upper Paleolithic Archeology of the Levant and Beyond by Takeshi Akuhara
Cover of the book Geo-Spatial Knowledge and Intelligence by Takeshi Akuhara
Cover of the book The Power of Education by Takeshi Akuhara
Cover of the book The Essentials of Power System Dynamics and Control by Takeshi Akuhara
Cover of the book Spatial Polarization Characteristics of Radar Antenna by Takeshi Akuhara
Cover of the book Teacher Education Policy and Practice by Takeshi Akuhara
Cover of the book In Pursuit of Presence or Prominence? by Takeshi Akuhara
Cover of the book Informetrics by Takeshi Akuhara
Cover of the book Modern Chinese Literature, Lin Shu and the Reformist Movement by Takeshi Akuhara
Cover of the book Cyber-Physical System Design from an Architecture Analysis Viewpoint by Takeshi Akuhara
Cover of the book Innovations in Open and Flexible Education by Takeshi Akuhara
We use our own "cookies" and third party cookies to improve services and to see statistical information. By using this website, you agree to our Privacy Policy