Recent Projects

SeisNN: Deep Learning Seismic Phase Auto-Picking Package

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SeisNN: Deep Learning Seismic Phase Auto-Picking Package

  1. The project goal is making a solid pipeline for seismic phase auto-picking deep learning research and production.

     

  2. With this package, researchers can focus on making their own models.

     

  3. Source code is available on Github.

黃俊銘 Chun-Ming Huang
碩士論文：利用深度學習為基礎的 P 波自動挑波套件
Master’s Thesis: An Automatic P Phase Picking Toolbox Using Deep Learning Method

https://github.com/SeisNN/SeisNN

Three-dimensional crustal structure from dense seismic array

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Three-dimensional crustal structure in the northern part of Eastern Taiwan from dense seismic array data sets

  1. Due to the dense ray coverage of body waves and seismic networks, we further apply both body wave tomography and joint inversion tomography of body and surface waves.

  2. Combined with the high resolution velocity models and the spacial distribution of these more complete aftershocks, our results clearly depict several local tectonic structures that have not been observed at the northern tip of the Longitudinal Valley, not only a suture but also a transitional area from collision to subduction.

鍾佩瑜 Pei-Yu Jhong
碩士論文：利用密集地震網探討花東縱谷北段地下速度構造
Master’s Thesis: Three-dimensional crustal structure in the northern part of Eastern Taiwan from dense seismic array data sets

Subsurface Structure Investigation from High-Resolution Seismic Reflection Data

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Subsurface Structure Investigation of the Longitudinal Valley, Eastern Taiwan from High-Resolution Seismic Reflection Data

  1. The profile J north of the Peinanshan in Luyeh reveals the east-dipping Luyeh fault, and the undulations of the alluvium strata are observed as a result of the fault.

  2. The deformation and tilting of the sedimentary strata in the southern Longitudinal Valley is inferred to relate to the collision toward the northwest from the southern Costal Range and the reverse movement of active faults in the LV.

賴思穎 Szu-Ying Lai
碩士論文：應用高解析反射震測探討花東縱谷地下構造
Master’s Thesis: Subsurface Structure Investigation of the Longitudinal Valley, Eastern Taiwan from High-Resolution Seismic Reflection Data

High-Frequency Receiver Function Technique from Dense Seismic Array

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Shallow Subsurface Structure Beneath the Northern Longitudinal Valley in Eastern Taiwan Using the High-Frequency Receiver Function from A Dense Seismic Array Data Set

  1. It is feasible to apply the high-frequency receiver function technique to dense ZLAND seismic array data to obtain the location of the main interfaces and the shallow structure.

  2. The thickness of the alluvium in the region could reach to the depth of approximately 200~300 meters.

  3. The distribution of the alluvium is matched with the old river channels of Mugua River and Hualien River.

蘇俊誥 Chun-Kao Su
碩士論文：利用密集地震網資料配合高頻接收函數法探討花東縱谷北段淺層構造
Master’s Thesis: Shallow Subsurface Structure Beneath the Northern Longitudinal Valley in Eastern Taiwan Using the High-Frequency Receiver Function from A Dense Seismic Array Data Set

The shallow subsurface velocity structures using Ambient Noise Tomography

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The shallow subsurfacevelocity structuresin Penghu Islands using Ambient Noise Tomography

  1. We deployed 125 Texan instruments from Mayto June 2015.

  2. The Rayleigh wave empirical Green’s function between the two stations is reconstructed from the continuous record of the station pair.

  3. Based on the well logs and the distribution of magnetic anomalies, the higher velocities beneath the bay areas could be related to the intrusive igneous rocks.

翁筱彤 Siao-Tong Wong
碩士論文：利用噪訊成像探討澎湖群島淺層地下速度構造
Master’s Thesis: The shallow subsurface velocity structures in Penghu Islands using Ambient Noise Tomography

Inner-core Sensitive PKP Phases

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Sensitivities of Finite-frequency Body Waves: Inner-core Sensitive PKP Phases

  1. The AxiSEM backward wavefield database utilized the reciprocity theorem of Green’s function and can further extract the synthetic seismograms with arbitrary source-receiver pair and focal mechanism.

  2. PKIKP and PKPbc delay time kernels show a classical banana-doughnut patterneven in a 1 Hz frequency, and PKPab kernels show a counter-banana-doughnut shape intheouter core.

 

甘禮有 Li-Yu Kan
碩士論文：有限頻寬體波之內核PKP敏感度算核
Master’s Thesis: Sensitivities of Finite-frequency Body Waves: Inner-core Sensitive PKP Phases

Seismic reflection survey in eastern Taiwan

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Seismic reflection survey in the northern part of the Longitudinal Valley, the suture zone, in eastern Taiwan

  1. In this study, we found that beneath the longitudinal valley, there are about 2000 m thick of sedimentary beddings laid on top of the basement dipping to the east.

  2. In fact that only Lingding fault has been found in the section, no other major fault has been discovered.

謝一銘 Yi-Ming Shie
碩士論文：台灣花東縱谷北段反射震測調查
Master’s Thesis: Seismic reflection survey in the northern part of the Longitudinal Valley, the suture zone, in eastern Taiwan

3-D Vs ambient noise tomography from dense seismic array

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3-D shear wave shallow crustal structures at Meishan fault zone using ambient noise tomography

  1. We present the results of 3-D shear wave shallow crustal velocity structure from ambient noise Rayleigh wave tomography with the data set of dense seismic array.

  2. The results of ambient noise tomography has finer resolution than previous studies from geophysical way.

Kuo-Chen, H., K.-X. Chen, W.-F. Sun, C.-W. Ho, Y.-H. Lee, Z.-K. Guan, C.-C. Kang, W.-Y. Chang (2017) 3D Vs ambient noise tomography in the source region of the 2016 Mw6.4 Meinong earthquake in Taiwan, Terrestrial, Atmospheric and Oceanic Sciences, doi:10.3319/TAO.2016.12.28.01

鄭璟郁 Ching-Yu Cheng
碩士論文：利用噪聲成像解析嘉義梅山斷層區域之三維淺層剪力波速度構造
Master’s Thesis: 3-D shear wave shallow crustal structures at Meishan fault zone using ambient noise tomography

Study seismic stratigraphy in the alluvium fan

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Study seismic stratigraphy in the alluvium fan

  1. We have completed four seismic profiles with a total of 10.748 km in length and according to the seismic data four unconformities can be identified from seismic stratigraphy analysis.

  2. According to the analysis of sequence stratigraphy, it is found that this area is in a sedimentary cycle from the development of the transgressive system to the high stand system tracts, and from the topographies of the unconformities in different periods it indicates that the river was through headward erosion.

Seismic anisotropy from teleseismic shear wave splitting measurements

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Seismic anisotropy in the Fujian lithosphere and its tectonic implications from teleseismic shear wave splitting measurements

  1. As a result, the thickness of anisotropic layer increases from northeast to southwestin the Fujian area and in the southern part.

  2. Compared with the global tomography, it can be explained that the variations of fast-polarizations could relate to the EW mantle flowcreated by NS collision between the India and Eurasian Plates.

鍾仁齊 Jen-Chi Chung
碩士論文：利用剪力波分離探討福建地區岩石圈的非均向性及其地體構造上之意涵
Master’s Thesis: Seismic anisotropy in the Fujian lithosphere and its tectonic implications from teleseismic shear wave splitting measurements