Detailed structures of the subducted Philippine Sea Plate beneath northeast Taiwan: A new type of double seismic zone

1999 ◽  
Vol 104 (B1) ◽  
pp. 1015-1033 ◽  
Author(s):  
Honn Kao ◽  
Ruey-Juin Rau
Keyword(s):  
Philippine Sea Plate ◽  
Seismic Zone ◽  
Philippine Sea ◽  
Double Seismic Zone ◽  
New Type

scholarly journals Configuration and structure of the Philippine Sea Plate off Boso, Japan: constraints on the shallow subduction kinematics, seismicity, and slow slip events

2019 ◽  
Vol 71 (1) ◽  
Author(s):  
Aki Ito ◽  
Takashi Tonegawa ◽  
Naoki Uchida ◽  
Yojiro Yamamoto ◽  
Daisuke Suetsugu ◽  
...  
Keyword(s):  
Receiver Function ◽  
Function Analysis ◽  
Philippine Sea Plate ◽  
Slow Slip ◽  
Low Velocity ◽  
Slow Slip Events ◽  
Philippine Sea ◽  
Receiver Function Analysis ◽  
Eastern Edge ◽  
Upper Boundary

Abstract We applied tomographic inversion and receiver function analysis to seismic data from ocean-bottom seismometers and land-based stations to understand the structure and its relationship with slow slip events off Boso, Japan. First, we delineated the upper boundary of the Philippine Sea Plate based on both the velocity structure and the locations of the low-angle thrust-faulting earthquakes. The upper boundary of the Philippine Sea Plate is distorted upward by a few kilometers between 140.5 and 141.0°E. We also determined the eastern edge of the Philippine Sea Plate based on the delineated upper boundary and the results of the receiver function analysis. The eastern edge has a northwest–southeast trend between the triple junction and 141.6°E, which changes to a north–south trend north of 34.7°N. The change in the subduction direction at 1–3 Ma might have resulted in the inflection of the eastern edge of the subducted Philippine Sea Plate. Second, we compared the subduction zone structure and hypocenter locations and the area of the Boso slow slip events. Most of the low-angle thrust-faulting earthquakes identified in this study occurred outside the areas of recurrent Boso slow slip events, which indicates that the slow slip area and regular low-angle thrust earthquakes are spatially separated in the offshore area. In addition, the slow slip areas are located only at the contact zone between the crustal parts of the North American Plate and the subducting Philippine Sea Plate. The localization of the slow slip events in the crust–crust contact zone off Boso is examined for the first time in this study. Finally, we detected a relatively low-velocity region in the mantle of the Philippine Sea Plate. The low-velocity mantle can be interpreted as serpentinized peridotite, which is also found in the Philippine Sea Plate prior to subduction. The serpentinized peridotite zone remains after the subduction of the Philippine Sea Plate and is likely distributed over a wide area along the subducted slab.

Contrasting subduction structures within the Philippine Sea plate: Hydrous oceanic crust and anhydrous volcanic arc crust

2014 ◽  
Vol 15 (5) ◽  
pp. 1977-1990 ◽  
Author(s):  
Ryuta Arai ◽  
Takaya Iwasaki ◽  
Hiroshi Sato ◽  
Susumu Abe ◽  
Naoshi Hirata
Keyword(s):  
Oceanic Crust ◽  
Philippine Sea Plate ◽  
Volcanic Arc ◽  
Philippine Sea

scholarly journals Indentation of the Philippine Sea plate by the Eurasia plate in Taiwan: Details from recent marine seismological experiments

2013 ◽  
Vol 594 ◽  
pp. 60-79 ◽  
Author(s):  
Serge Lallemand ◽  
Thomas Theunissen ◽  
Philippe Schnürle ◽  
Chao-Shing Lee ◽  
Char-Shine Liu ◽  
...  
Keyword(s):  
Philippine Sea Plate ◽  
Philippine Sea

Variations in sediment thickness and type along the northern Philippine Sea Plate at the Nankai Trough

Island Arc ◽  
2008 ◽  
Vol 17 (3) ◽  
pp. 342-357 ◽  
Author(s):  
Toshihiro Ike ◽  
Gregory F. Moore ◽  
Shin'ichi Kuramoto ◽  
Jin-Oh Park ◽  
Yoshiyuki Kaneda ◽  
...  
Keyword(s):  
Nankai Trough ◽  
Philippine Sea Plate ◽  
Sediment Thickness ◽  
Philippine Sea

scholarly journals Plate convergence measured by GPS across the Sundaland/Philippine Sea Plate deformed boundary: the Philippines and eastern Indonesia

1999 ◽  
Vol 139 (2) ◽  
pp. 296-316 ◽  
Author(s):  
C. Rangin ◽  
X. Le Pichon ◽  
S. Mazzotti ◽  
M. Pubellier ◽  
N. Chamot-Rooke ◽  
...  
Keyword(s):  
The Philippines ◽  
Philippine Sea Plate ◽  
Plate Convergence ◽  
Philippine Sea ◽  
Eastern Indonesia

A bump on the upper surface of the Philippine Sea plate beneath the Boso Peninsula, Japan inferred from seismic reflection surveys: A possible asperity of the 1703 Genroku earthquake

2009 ◽  
Vol 472 (1-4) ◽  
pp. 39-50 ◽  
Author(s):  
Noriko Tsumura ◽  
Nozomi Komada ◽  
Junpei Sano ◽  
Shinsuke Kikuchi ◽  
Shuji Yamamoto ◽  
...  
Keyword(s):  
Seismic Reflection ◽  
Philippine Sea Plate ◽  
Philippine Sea ◽  
Boso Peninsula

Frequency-dependent attenuation of shear waves in the crust of the southern Kanto area, Japan

1994 ◽  
Vol 84 (5) ◽  
pp. 1387-1396
Author(s):  
Shigeo Kinoshita
Keyword(s):  
Shear Waves ◽  
Strong Motion ◽  
Body Waves ◽  
Philippine Sea Plate ◽  
Eurasian Plate ◽  
Philippine Sea ◽  
Motion Data ◽  
Basement Rocks ◽  
Acceleration Data ◽  
Attenuation Characteristics

Abstract The attenuation characteristics of shear waves in the crust of the southern Kanto area, central Japan, were estimated using strong-motion data, including acceleration data recorded in the pre-Tertiary basement rocks by means of downhole observation. The quality factor Qs(f) was determined for a range of discrete frequencies from 0.5 to 16 Hz from the analysis of data from 13 local earthquakes with focal depths of less than about 50 km that occurred in the Philippine Sea plate and in the boundary zone between the lower part of the Eurasian plate and the upper part of the Philippine Sea plate. The estimated 1/Qs(f) shows a peaked structure in this frequency range on the assumption that the geometrical spreading exponent is -1 (body waves). The estimated peak 1/Qs(f) is of the order of 10-2 at 0.8 Hz.

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