scholarly journals Source Rupture Process of the 2004 Chuetsu, Mid-Niigata Prefecture, Japan, Earthquake Inferred from Waveform Inversion with Dense Strong-Motion Data

2009 ◽  
Vol 99 (1) ◽  
pp. 123-140 ◽  
Author(s):  
K. Asano ◽  
T. Iwata
Keyword(s):  
Waveform Inversion ◽  
Strong Motion ◽  
Rupture Process ◽  
Source Rupture Process ◽  
Strong Motion Data ◽  
Motion Data ◽  
Niigata Prefecture

scholarly journals Ground motion and rupture process of the 2004 Mid Niigata Prefecture earthquake obtained from strong motion data of K-NET and KiK-net

2005 ◽  
Vol 57 (6) ◽  
pp. 527-532 ◽  
Author(s):  
R. Honda ◽  
S. Aoi ◽  
N. Morikawa ◽  
H. Sekiguchi ◽  
T. Kunugi ◽  
...  
Keyword(s):  
Ground Motion ◽  
Strong Motion ◽  
Rupture Process ◽  
Strong Motion Data ◽  
Motion Data ◽  
Niigata Prefecture

scholarly journals Ground motion and rupture process of the 2003 Tokachi-oki earthquake obtained from strong motion data of K-NET and KiK-net

2004 ◽  
Vol 56 (3) ◽  
pp. 317-322 ◽  
Author(s):  
Ryou Honda ◽  
Shin Aoi ◽  
Nobuyuki Morikawa ◽  
Haruko Sekiguchi ◽  
Takashi Kunugi ◽  
...  
Keyword(s):  
Ground Motion ◽  
Strong Motion ◽  
Rupture Process ◽  
Strong Motion Data ◽  
Motion Data

scholarly journals Rupture process of the 2005 West Off Fukuoka Prefecture earthquake obtained from strong motion data of K-NET and KiK-net

2006 ◽  
Vol 58 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Haruko Sekiguchi ◽  
Shin Aoi ◽  
Ryou Honda ◽  
Nobuyuki Morikawa ◽  
Takashi Kunugi ◽  
...  
Keyword(s):  
Strong Motion ◽  
Rupture Process ◽  
Strong Motion Data ◽  
Fukuoka Prefecture ◽  
Motion Data

Loreto Intermediate Depth Earthquake of 26 May 2019 (Northeast Peru): Source Parameters by Inversion of Local to Regional Waveforms and Strong-Motion Observations

2021 ◽  
Author(s):  
Hernando Tavera ◽  
Bertrand Delouis ◽  
Arturo Mercado ◽  
David Portugal
Keyword(s):  
Near Field ◽  
Source Parameters ◽  
Waveform Inversion ◽  
Strong Motion ◽  
Seismic Source ◽  
Slab Geometry ◽  
Nazca Plate ◽  
Strong Motion Data ◽  
Ground Shaking ◽  
Motion Data

Abstract The Loreto earthquake of 26 May 2019 occurred below the extreme northeast part of Peru at a depth of 140 km within the subducting Nazca plate at a distance of 700 km from the trench Peru–Chile. The orientation of the seismic source was obtained from waveform inversion in the near field using velocity and strong-motion data. The rupture occurred in normal faulting corresponding to a tensional process with T axis oriented in east–west direction similar to the direction of convergence between the Nazca and South America plates. The analysis of the strong-motion data shows that the levels of ground shaking are very heterogeneous with values greater than 50 Gal up to distances of 300 km; the maximum recorded acceleration of 122 Gal at a distance of 100 km from the epicenter. The Loreto earthquake is classified as a large extensional event in the descending Nazca slab in the transition from flat-slab geometry to greater dip.

scholarly journals Source rupture process of the 2018 Hokkaido Eastern Iburi earthquake deduced from strong-motion data considering seismic wave propagation in three-dimensional velocity structure

2019 ◽  
Vol 71 (1) ◽  
Author(s):  
Kimiyuki Asano ◽  
Tomotaka Iwata
Keyword(s):  
Spatial Distribution ◽  
Velocity Structure ◽  
Three Dimensional ◽  
Strong Motion ◽  
Rupture Process ◽  
Motion Simulation ◽  
Ground Motion Simulation ◽  
Source Rupture Process ◽  
Motion Data ◽  
Slip Area

Abstract The source rupture process of the 2018 Hokkaido Eastern Iburi earthquake (MJMA 6.7) was analyzed by a kinematic waveform inversion method using strong-motion data in 0.04–0.5 Hz. This earthquake occurred close to the Hidaka Collision Zone and the Ishikari depression, where the crustal structure is rather complex. Thus, we used a three-dimensional velocity structure model to compute the theoretical Green’s functions by the finite difference method. A source fault model with strike-angle variation was set based on the spatial distribution of the early aftershocks. The strong-motion stations used for the source inversion were selected based on the result of forward ground motion simulation of a moderate aftershock. The slip in the first 5 s was relatively small, but an area of significant slip with peak slip of 1.7 m was found in the depth range from 22 to 32 km. The rupture propagated upward mainly in the southwest direction. Based on the regional crustal structure and the configuration of the Moho discontinuity, the large-slip area was thought to be located in the lower crust, and its rupture did not reach the upper part of the continental crust. Most of the early aftershocks occurred around the large-slip area. The later aftershocks at the depth shallower than 20 km occurred outside the causative source fault of the mainshock. Three-dimensional ground motion simulation demonstrated that the heterogeneous source process and the three-dimensional basin and crustal velocity structure brought a large velocity pulse to an area to the southwest of the source fault, where the largest PGV was observed during the mainshock. The spatial distribution of the simulated PGV resembled the observed PGV distribution except some sites located inside the Ishikari depression where thick Quaternary soft low-velocity sediments exist at the top of the basin.

scholarly journals Kinematic rupture process of the 2007 Tocopilla earthquake and its main aftershocks from teleseismic and strong-motion data

2010 ◽  
Vol 182 (3) ◽  
pp. 1411-1430 ◽  
Author(s):  
S. Peyrat ◽  
R. Madariaga ◽  
E. Buforn ◽  
J. Campos ◽  
G. Asch ◽  
...  
Keyword(s):  
Strong Motion ◽  
Rupture Process ◽  
Strong Motion Data ◽  
Motion Data
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