scholarly journals Permeability enhancement in the aquifer of Fuxin well in geothermal area of northeastern China induced by low-frequency teleseismic waves of the 2011 Mw 9.0 Tohoku earthquake

2015 ◽  
pp. 29-38 ◽  
Author(s):  
Yan Zhang
Keyword(s):  
Low Frequency ◽  
Tohoku Earthquake ◽  
Northeastern China ◽  
Geothermal Area ◽  
Permeability Enhancement ◽  
Teleseismic Waves

scholarly journals Ground uplift related to permeability enhancement following the 2011 Tohoku earthquake in the Kanto Plain, Japan

2017 ◽  
Vol 69 (1) ◽  
Author(s):  
Kazuya Ishitsuka ◽  
Toshifumi Matsuoka ◽  
Takuya Nishimura ◽  
Takeshi Tsuji ◽  
Tamer ElGharbawi
Keyword(s):  
Tohoku Earthquake ◽  
2011 Tohoku Earthquake ◽  
The 2011 Tohoku Earthquake ◽  
Permeability Enhancement

An investigation of the properties of low-frequency internal waves in the northeastern China Seas

1989 ◽  
Vol 7 (4) ◽  
pp. 289-299 ◽  
Author(s):  
Fang Xinhua ◽  
Zhang Yulin ◽  
Sun Haili ◽  
Ye Jianhua
Keyword(s):  
Internal Waves ◽  
Low Frequency ◽  
Northeastern China ◽  
China Seas

scholarly journals 2011 TOHOKU TSUNAMI RUNUP AND DEVASTATING DAMAGES AROUND YAMADA BAY, IWATE: SURVEYS AND NUMERICAL SIMULATION

2012 ◽  
Vol 1 (33) ◽  
pp. 4 ◽  
Author(s):  
Akio Okayasu ◽  
Takenori Shimozono ◽  
Shinji Sato ◽  
Yoshimitsu Tajima ◽  
Haijiang Liu ◽  
...  
Keyword(s):  
Low Frequency ◽  
Tohoku Earthquake ◽  
Frequency Component ◽  
Frequency Separation ◽  
High Frequency Component ◽  
Tsunami Height ◽  
2011 Tohoku Tsunami ◽  
The Pacific ◽  
Runup Height ◽  
Tohoku Tsunami

Distributions of inundation and runup height for the 2011 off the Pacific coast of Tohoku Earthquake Tsunami were measured in and outside Yamada Bay located at the center of Iwate Prefecture, Japan. Numerical simulations were conducted to reproduce flow, inundation and runup height distributions. Surface elevation profiles recorded by the GPS wave gauges were used as the offshore boundary condition. In order to investigate characteristics of tsunami response to different geomorphological features, frequency separation was tried for the tsunami incident wave. It was found that the high frequency component was responsible for large tsunami height at narrow inlets and open bays, whereas the low frequency component had significant influence for inundation in closed bays.

Rotational Seismology with a Quartz Rotation Sensor

2021 ◽  
Author(s):  
Krishna Venkateswara ◽  
Jerome Paros ◽  
Paul Bodin ◽  
William Wilcock ◽  
Harold J. Tobin
Keyword(s):  
Seismic Isolation ◽  
Low Frequency ◽  
Noise Floor ◽  
Rotational Seismology ◽  
Rotation Sensor ◽  
Rotational Components ◽  
Teleseismic Waves ◽  
And Performance ◽  
Resonant Period ◽  
Magnitude Improvement

Abstract We describe the construction and performance of a new high-precision ground- or platform-rotation sensor called the Quartz Rotation Sensor (QRS). The QRS is a mechanical angular accelerometer that senses rotational torque with an inherently digital, load-sensitive resonant quartz crystal. The noise floor is measured to be ∼45 pico-radians/root (Hz) near 1 Hz, and the resonant period of the sensor is about 10 s, making it a broadband sensor. Among similarly sized broadband rotation sensors, this represents more than two orders of magnitude improvement in noise floor near 0.1 Hz. We present measurements of rotational components of teleseismic waves recorded with the sensor at a vault. The QRS is useful for rotational seismology and for improving low-frequency seismic isolation in demanding applications such as the Laser Interferometer Gravitational-Wave Observatories.

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