scholarly journals Hypocenter Relocation of Earthquake Swarm in West Halmahera, North Molucca Region, Indonesia by using Double-Difference Method and 3D Seismic Velocity Structure

2017 ◽  
Vol 62 ◽  
pp. 012053 ◽  
Author(s):  
Andri Dian Nugraha ◽  
Hasbi Ash Shiddiqi ◽  
Sri Widiyantoro ◽  
Nanang T Puspito ◽  
Wahyu Triyoso ◽  
...  
Keyword(s):  
Difference Method ◽  
Velocity Structure ◽  
Seismic Velocity ◽  
Earthquake Swarm ◽  
Double Difference ◽  
3D Seismic ◽  
Seismic Velocity Structure ◽  
Hypocenter Relocation

scholarly journals Seismic Velocity Structure in the Area of the 2007, Mw 8.0, Pisco-Peru Earthquake: Implications for the Mechanics of Subduction in the Vicinity of the Nazca Ridge

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
I. Bernal ◽  
H. Tavera
Keyword(s):  
Velocity Structure ◽  
Seismic Velocity ◽  
Velocity Model ◽  
Double Difference ◽  
Seismic Velocity Structure ◽  
Uplift Rates ◽  
Northern Edge ◽  
Nazca Ridge ◽  
Geomorphological Features ◽  
Postseismic Slip

In this study, we present a velocity model for the area of the 2007 Pisco-Peru earthquake ( Mw = 8.0 ) obtained using a double-difference tomography algorithm that considers aftershocks acquired for 6 months. The studied area is particularly interesting because it lies on the northern edge of the Nazca Ridge, in which the subduction of a large bathymetric structure is the origin of geomorphological features of the central coast of Peru. Relocated seismicity is used to infer the geometry of the subduction slab on the northern flank of the Nazca Ridge. The results prove that the geometry is continuous but convex because of the subduction of the ridge, thereby explaining the high uplift rates observed in this area. Our inferred distribution of seismicity agrees with both the coseismic and postseismic slip distributions.

scholarly journals 3D Seismic Velocity Structure below Mounds and Pockmarks in the Deep Water Southwest of the Sado Island

2009 ◽  
Vol 118 (1) ◽  
pp. 93-110 ◽  
Author(s):  
Tatsuo SAEKI ◽  
Takao INAMORI ◽  
Sadao NAGAKUBO ◽  
Peter WARD ◽  
Eiichi ASAKAWA
Keyword(s):  
Deep Water ◽  
Velocity Structure ◽  
Seismic Velocity ◽  
3D Seismic ◽  
Seismic Velocity Structure
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