scholarly journals Strong-motion characteristics during the 2011 Tohoku earthquake

2013 ◽  
Vol 50 (2) ◽  
pp. 75-82
Author(s):  
Susumu OHNO
Keyword(s):  
Strong Motion ◽  
Tohoku Earthquake ◽  
2011 Tohoku Earthquake ◽  
The 2011 Tohoku Earthquake ◽  
Motion Characteristics

scholarly journals An Overview of Source Models from Strong Motion Records of the 2011 Tohoku Earthquake

2016 ◽  
Vol 16 (4) ◽  
pp. 4_12-4_21
Author(s):  
Hiroe MIYAKE ◽  
Kimiyuki ASANO ◽  
Kazuki KOKETSU ◽  
Tomotaka IWATA
Keyword(s):  
Strong Motion ◽  
Tohoku Earthquake ◽  
2011 Tohoku Earthquake ◽  
The 2011 Tohoku Earthquake ◽  
Strong Motion Records ◽  
Source Models

Seismic Hazard Assessment for Japan: Reconsiderations After the 2011 Tohoku Earthquake

2013 ◽  
Vol 8 (5) ◽  
pp. 848-860 ◽  
Author(s):  
Hiroyuki Fujiwara ◽  
◽  
Nobuyuki Morikawa ◽  
Toshihiko Okumura ◽  
Keyword(s):  
Seismic Hazard ◽  
Hazard Assessment ◽  
Strong Motion ◽  
Seismic Hazard Assessment ◽  
Tohoku Earthquake ◽  
Lessons Learned ◽  
2011 Tohoku Earthquake ◽  
Hazard Maps ◽  
The 2011 Tohoku Earthquake ◽  
Seismic Hazard Maps

Under the guidance of the Headquarters for Earthquake Research Promotion of Japan, we have been carrying out seismic hazard assessment for Japan since the 1995 Hyogo-ken Nanbu Earthquake and have made the National Seismic Hazard Maps for Japan to estimate strong motion caused by earthquakes that could occur in Japan in the future, and show estimated results on these maps. The Hazard Maps consist of two kinds of maps. One kind is a probabilistic seismic hazard map that shows the relation between seismic intensity value and its probability of exceedance within a certain period. The other kind is a scenario earthquake shaking map. In order to promote the use of the National Seismic Hazard Maps, we have developed an open Web system to provide information interactively, and have named this system the Japan Seismic Hazard Information Station (J-SHIS). The 2011 Tohoku Earthquake (Mw9.0) was the largest such event in the recorded history of Japan. This megathrust earthquake was not considered in the National Seismic Hazard Maps for Japan. Based on lessons learned from this earthquake disaster and on experience we have had in the seismic hazardmapping project of Japan, we consider problems and issues to be resolved for seismic hazard assessment and make proposals to improve seismic hazard assessment for Japan.

Empirical Fragility Curves of Buildings in Northern Miyagi Prefecture During the 2011 off the Pacific Coast of Tohoku Earthquake

2016 ◽  
Vol 11 (6) ◽  
pp. 1253-1270 ◽  
Author(s):  
Hao Wu ◽  
◽  
Kazuaki Masaki ◽  
Kojiro Irikura ◽  
Susumu Kurahashi ◽  
...  
Keyword(s):  
Pacific Coast ◽  
Fragility Curves ◽  
Ground Motions ◽  
Strong Motion ◽  
Tohoku Earthquake ◽  
2011 Tohoku Earthquake ◽  
The 2011 Tohoku Earthquake ◽  
Kobe Earthquake ◽  
The Pacific ◽  
Miyagi Prefecture

In this study, empirical fragility curves expressed in terms of relationship between damage ratio indices of buildings and ground motion indices were developed in northern Miyagi prefecture located in near-field areas during the 2011 off the Pacific coast of Tohoku Earthquake. The ground motion indices were evaluated from observed ground motions at strong-motion stations and estimated at sites at which no strong-motion accelerometers were deployed during the mainshock. The ground motions at the non-instrumental sites were estimated using the empirical Green’s function method based on bedrock motions inverted from observed records on surfaces from small events that occurred inside the source fault, transfer functions due to underground velocity structures identified from microtremor H/V spectral ratios, and a short-period source model of the mainshock. The findings indicated that the empirical fragility curves as functions of Japan Meteorological Agency (JMA) instrumental seismic intensity during the 2011 Tohoku Earthquake almost corresponded to those during the 1995 Kobe Earthquake and the seven disastrous earthquakes that occurred between 2003 and 2008. However, the empirical fragility curves as functions of peak ground velocity were the lowest. A possible reason for this is that the response spectra of the ground motions in the period ranging from 1.0 s to 1.5 s were small during the 2011 Tohoku Earthquake. Another reason could be the seismic resistant capacities of buildings in the studied districts involved during the 2011 Tohoku Earthquake exceeded those in the cities affected during the 1995 Kobe Earthquake.

scholarly journals Relationship between Building Damage Ratios and Ground Motion Characteristics during the 2011 Tohoku Earthquake

2012 ◽  
Vol 34 (1) ◽  
pp. 59-78 ◽  
Author(s):  
Hao WU ◽  
Kazuaki MASAKI ◽  
Kojiro IRIKURA ◽  
Koichiro SAGUCHI ◽  
Susumu KURAHASHI ◽  
...  
Keyword(s):  
Ground Motion ◽  
Tohoku Earthquake ◽  
Building Damage ◽  
2011 Tohoku Earthquake ◽  
The 2011 Tohoku Earthquake ◽  
Motion Characteristics

scholarly journals Joint inversion of strong motion, teleseismic, geodetic, and tsunami datasets for the rupture process of the 2011 Tohoku earthquake

2011 ◽  
Vol 38 (7) ◽  
pp. n/a-n/a ◽  
Author(s):  
Yusuke Yokota ◽  
Kazuki Koketsu ◽  
Yushiro Fujii ◽  
Kenji Satake ◽  
Shin'ichi Sakai ◽  
...  
Keyword(s):  
Joint Inversion ◽  
Strong Motion ◽  
Tohoku Earthquake ◽  
Rupture Process ◽  
2011 Tohoku Earthquake ◽  
The 2011 Tohoku Earthquake
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