scholarly journals Tsunami waveform inversion for sea surface displacement following the 2011 Tohoku earthquake: Importance of dispersion and source kinematics

2015 ◽  
Vol 120 (9) ◽  
pp. 6452-6473 ◽  
Author(s):  
M. Jakir Hossen ◽  
Phil R. Cummins ◽  
Jan Dettmer ◽  
Toshitaka Baba
Keyword(s):  
Waveform Inversion ◽  
Surface Displacement ◽  
Tohoku Earthquake ◽  
2011 Tohoku Earthquake ◽  
Sea Surface ◽  
The 2011 Tohoku Earthquake ◽  
Tsunami Waveform Inversion ◽  
Tsunami Waveform

scholarly journals Randomly distributed unit sources to enhance optimization in tsunami waveform inversion

2014 ◽  
Vol 2 (5) ◽  
pp. 3659-3682
Author(s):  
I. E. Mulia ◽  
T. Asano
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Surface Deformation ◽  
Waveform Inversion ◽  
Sea Surface ◽  
Tsunami Source ◽  
Unknown Parameters ◽  
Tsunami Waveform Inversion ◽  
Tsunami Waveform

Abstract. Determination of sea surface deformation generated by earthquakes is crucial to the success of tsunami modeling. Using waveforms recorded at measurement stations and assuming that the rupture velocity is much faster than the tsunami wave celerity, sea surface deformation caused by a tsunamigenic earthquake can be inferred through an inversion operation using the Green's function technique. However, this inversion method for tsunami waveforms possesses a limitation, in that the inverse matrix does not always exist because of the non-uniqueness of the solution. In addition to the large number of unknown parameters, which might produce many local optima on the misfit function measure, the search towards optimality is confined by the uniform distance of unit sources used in the regular Green's function. This study proposes a new method to both optimize the determination of the unknown parameters and introduce a global optimization method for tsunami waveform inversion. The method has been tested using an artificial tsunami source with real bathymetry data. A significant improvement is achieved by stochastically searching for an optimal distribution of unit source locations prior to the inversion.

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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