A New Automatic Full‐Waveform Regional Moment Tensor Inversion Algorithm and Its Applications in the Taiwan Area

2018 ◽  
Vol 108 (2) ◽  
pp. 573-587 ◽  
Author(s):  
Pei‐Ru Jian ◽  
Tai‐Lin Tseng ◽  
Wen‐Tzong Liang ◽  
Ping‐Han Huang
Keyword(s):  
Moment Tensor ◽  
Moment Tensor Inversion ◽  
Inversion Algorithm ◽  
Full Waveform ◽  
Taiwan Area

Adaptive full-waveform moment-tensor inversion of microseismic data

2021 ◽  
Author(s):  
Kai Gao ◽  
Lianjie Huang ◽  
Yan Qin ◽  
Ting Chen ◽  
David Coblentz ◽  
...  
Keyword(s):  
Moment Tensor ◽  
Moment Tensor Inversion ◽  
Full Waveform ◽  
Microseismic Data

Application of full-waveform event location and moment-tensor inversion for Groningen induced seismicity

2018 ◽  
Vol 37 (2) ◽  
pp. 92-99 ◽  
Author(s):  
Chris Willacy ◽  
Ewoud van Dedem ◽  
Sara Minisini ◽  
Junlun Li ◽  
Jan Willem Blokland ◽  
...  
Keyword(s):  
Induced Seismicity ◽  
Moment Tensor ◽  
Moment Tensor Inversion ◽  
Full Waveform ◽  
Event Location

scholarly journals Full-waveform event location and moment tensor inversion for induced seismicity

Geophysics ◽  
2019 ◽  
Vol 84 (2) ◽  
pp. KS39-KS57 ◽  
Author(s):  
Chris Willacy ◽  
Ewoud van Dedem ◽  
Sara Minisini ◽  
Junlun Li ◽  
Jan-Willem Blokland ◽  
...  
Keyword(s):  
Induced Seismicity ◽  
Moment Tensor ◽  
Focal Mechanisms ◽  
Moment Tensor Inversion ◽  
Earthquake Activity ◽  
Lower Velocity ◽  
Full Waveform ◽  
Stress Changes ◽  
Event Location ◽  
Location Methods

Locating microearthquake events below complex heterogeneous overburden requires robust location methodologies that can honor multipathing in the seismic wavefield. We have developed two full-waveform event location methods that form a complementary solution for locating earthquakes and simultaneously deriving focal mechanisms via moment tensor inversion. The methods are based on the application of 3D elastic wavefield modeling, which is used to generate waveforms and extract wavefield attributes, for comparison to the observed field data. Events are located and focal mechanisms are derived via a multiparameter inversion, which minimizes the differences between synthetic and observed data. The results have been applied to the induced seismicity observed within the giant Groningen gas field, onshore Netherlands, where recorded earthquakes are triggered by stress changes, induced in the reservoir through pressure depletion. Locating events below the field is compounded by the presence of strong guided waves, which are trapped in the lower velocity reservoir interval. This complex multivalued wavefield is problematic for traditional event location methods, which assume a single traveltime arrival. We overcome this limitation by using all event arrivals in a wave-based solution to improve the accuracy of locating earthquakes and overcome the ambiguity of solving for location and the focal mechanism simultaneously. The event location methods have been applied to shallow and deep monitoring networks, and 150 events have been located with high accuracy. The interpretation of the earthquake activity indicates that the events studied originate from the movement of larger graben bounding faults, which are oriented in a north-northwest–south-southeast direction.

Permian Basin case study part II: Full-waveform probabilistic moment tensor inversion

2020 ◽  
Author(s):  
Kaihong Wei ◽  
Chang Li ◽  
Mike Craven ◽  
Laura Swafford ◽  
Reynaldo Cardona ◽  
...  
Keyword(s):  
Moment Tensor ◽  
Moment Tensor Inversion ◽  
Permian Basin ◽  
Full Waveform
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