scholarly journals Reliability of Envelope Inversion for the High-Frequency Radiation Source Process Using Strong Motion Data: Example of the 1995 Hyogoken Nanbu Earthquake

2003 ◽  
Vol 93 (5) ◽  
pp. 2005-2016 ◽  
Author(s):  
J. Aguirre
Keyword(s):  
High Frequency ◽  
Radiation Source ◽  
Strong Motion ◽  
Source Process ◽  
Strong Motion Data ◽  
Motion Data ◽  
Frequency Radiation ◽  
High Frequency Radiation

Imaging the Samos 2020 Mw7.0 earthquake rupture by backprojecting local strong-motion recordings and relocating the aftershock sequence

2021 ◽  
Author(s):  
Ioannis Fountoulakis ◽  
Christos P. Evangelidis ◽  
Olga-Joan Ktenidou
Keyword(s):  
High Frequency ◽  
A Priori ◽  
Research Work ◽  
Strong Motion ◽  
Aftershock Sequence ◽  
Earthquake Rupture ◽  
Moment Tensors ◽  
Research And Innovation ◽  
Frequency Radiation ◽  
High Frequency Radiation

<p>On November 30, 2020 11:51 UTC, a major earthquake (Mw7.0) struck the northern area offshore Samos island, Greece, causing serious damage to the island and nearby Turkish coast. This seismic event is an ideal opportunity to explore extensional seismicity in the back-arc area of the Hellenic subduction zone. To that end, first and foremost we study the behavior and characteristics of the main event source. Then, we examine the evolution of the aftershock in space and time and relate it to the main event. We implement the technique of local backprojection on strong-motion recordings  (e.g. Kao & Shan, 2007; Evangelidis, 2013) to infer the spatiotemporal distribution of the earthquake source. This method is performed at relatively short periods, making it possible to map in detail the high-frequency radiation of the source, without imposing any a priori constraints on the geometry or shape of the ruptured fault. Furthermore, and which is not often the case, the strong-motion recordings were carefully assessed prior to being used in backprojection, in order to avoid any significant influence of local site effects and amplification, which could in impact the robustness of the backprojection solution. Synthetic tests were also used to resolve the accuracy. Our results show evidence of multiple distinct sources of high-frequency radiation during the earthquake rupture. In addition, the first month of the aftershock sequence was located, clustered and relocated, ultimately highlighting the faults activated in the area. The quality of the resulting high-resolution catalogue was further assessed, and the moment tensors of the strongest events were estimated. Combining the backprojection results with the detailed picture of the aftershock seismic sequence leads to an interpretation of the short- and long-term fault rupture process and their associated secondary effects (tsunami, landslides) in the area. </p><p>The research work was supported by the Hellenic Foundation for Research and Innovation (H.F.R.I.) under the “First Call for H.F.R.I. Research Projects to support Faculty members and Researchers and the procurement of high-cost research equipment grant” (SIREN, Project Number: 910).</p><p> </p>

scholarly journals Simultaneous Inversion of Geodetic and Strong Motion Data for the Source-Process of the Hyogo-ken Nanbu, Japan, Earthquake.

1996 ◽  
Vol 44 (5) ◽  
pp. 455-471 ◽  
Author(s):  
Haruo Horikawa ◽  
Kazuro Hirahara ◽  
Yasuhiro Umeda ◽  
Manabu Hashimoto ◽  
Fujio Kusano
Keyword(s):  
Strong Motion ◽  
Source Process ◽  
Strong Motion Data ◽  
Simultaneous Inversion ◽  
Motion Data

scholarly journals Source process and slip model of 2005 Dahuiyeh-Zarand earthquake (Iran) using inversion of near-field strong motion data

2012 ◽  
Vol 189 (1) ◽  
pp. 669-680 ◽  
Author(s):  
R. Rouhollahi ◽  
M. R. Ghayamghamian ◽  
F. Yaminifard ◽  
P. Suhadolc ◽  
M. Tatar
Keyword(s):  
Near Field ◽  
Strong Motion ◽  
Source Process ◽  
Slip Model ◽  
Strong Motion Data ◽  
Motion Data

scholarly journals Source process of the 2007 Niigata-ken Chuetsu-oki earthquake derived from near-fault strong motion data

2008 ◽  
Vol 60 (11) ◽  
pp. 1131-1135 ◽  
Author(s):  
Shin Aoi ◽  
Haruko Sekiguchi ◽  
Nobuyuki Morikawa ◽  
Takashi Kunugi
Keyword(s):  
Strong Motion ◽  
Source Process ◽  
Strong Motion Data ◽  
Motion Data ◽  
Near Fault
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