scholarly journals Surface waves of the 2011 Tohoku earthquake: Observations of Taiwan's dense high-rate GPS network

2013 ◽  
Vol 118 (1) ◽  
pp. 332-345 ◽  
Author(s):  
Huang-Kai Hung ◽  
Ruey-Juin Rau
Keyword(s):  
Surface Waves ◽  
Tohoku Earthquake ◽  
2011 Tohoku Earthquake ◽  
High Rate ◽  
The 2011 Tohoku Earthquake ◽  
Gps Network

scholarly journals Report on a characteristic oscillation about 38 mHz (26 s) in northeastern Japan following surface wave of the 2011 Tohoku megathrust earthquake

2015 ◽  
Vol 202 (1) ◽  
pp. 419-423 ◽  
Author(s):  
Yuta Mitsui ◽  
Kosuke Heki
Keyword(s):  
Surface Wave ◽  
Velocity Structure ◽  
Tohoku Earthquake ◽  
Spectral Ratio ◽  
2011 Tohoku Earthquake ◽  
High Rate ◽  
The 2011 Tohoku Earthquake ◽  
Northeastern Japan ◽  
Characteristic Oscillation ◽  
Gnss Data

Abstract We try to detect an unidentified signal from the surface motion at northeastern Japan immediately after the 2011 Tohoku earthquake. A focused frequency range is 10–100 mHz (10–100 s). We find a peaky signal with frequency of about 38 mHz (26 s) based on the horizontal-to-vertical (H/V) spectral ratio using the high-rate GNSS data at 382 GEONET stations. We are not able to identify locality of the signal. The signal appears several minutes after the passing of surface wave fronts. The duration of the signal is about 2 min. Since the origin of the 38 mHz signal is unlikely to be local hydrologic tremors, tectonic tremors, or the tsunami, we speculate that the 38 mHz signal originates from a kind of a characteristic oscillation of Northeastern Japan triggered by the 2011 Tohoku earthquake. A normal-mode simulation implies that high-order radial overtones could create the signal with a spherically-layered velocity structure, however, the detailed mechanism of the signal still remains a mystery.

scholarly journals Strain anomalies induced by the 2011 Tohoku Earthquake (M w 9.0) as observed by a dense GPS network in northeastern Japan

2012 ◽  
Vol 64 (12) ◽  
pp. 1231-1238 ◽  
Author(s):  
Mako Ohzono ◽  
Yasuo Yabe ◽  
Takeshi Iinuma ◽  
Yusaku Ohta ◽  
Satoshi Miura ◽  
...  
Keyword(s):  
Tohoku Earthquake ◽  
2011 Tohoku Earthquake ◽  
The 2011 Tohoku Earthquake ◽  
Gps Network ◽  
Northeastern Japan

Analysis of traveling ionospheric disturbances (TIDs) in GPS TEC launched by the 2011 Tohoku earthquake

Radio Science ◽  
2016 ◽  
Vol 51 (5) ◽  
pp. 507-514 ◽  
Author(s):  
Geoff Crowley ◽  
Irfan Azeem ◽  
Adam Reynolds ◽  
Timothy M. Duly ◽  
Patrick McBride ◽  
...  
Keyword(s):  
Tohoku Earthquake ◽  
2011 Tohoku Earthquake ◽  
Ionospheric Disturbances ◽  
The 2011 Tohoku Earthquake ◽  
Gps Tec ◽  
Traveling Ionospheric Disturbances

Tsunami source of the 2011 Tohoku earthquake detected by an ocean-bottom magnetometer

2013 ◽  
Vol 382 ◽  
pp. 117-124 ◽  
Author(s):  
Hiroshi Ichihara ◽  
Yozo Hamano ◽  
Kiyoshi Baba ◽  
Takafumi Kasaya
Keyword(s):  
Tohoku Earthquake ◽  
2011 Tohoku Earthquake ◽  
Tsunami Source ◽  
Ocean Bottom ◽  
The 2011 Tohoku Earthquake
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