AN ALGORITHM FITTING THE RATIO OF PmP AND Pn’s WAVE
AMPLITUDE FOR STUDYING MOHO STRUCTURE
1) Institute of Geophysics, CEA, Beijing 100081
Abstract A new approach based on theoretical reflectivity seismograms gainning Moho structure was proposed in the paper. The ratio of PmP and Pn’s wave amplitude and adjusts model were used to fit the predicted PmP/Pn curve with measured PmP/Pn curve. Experimental tests indicate that there exists significant difference among the theoretical PmP/Pn curves of Single Layer structure, Gradient Layers structure，layers stacked with high and low velocities structure. SL structure is similar to GLS structure’s PmP/Pn curve in the shape, however, the value of the former is roughly twice that of the latter, and HLVS structure’s PmP/Pn curve appears in concave shape. All shows that this method is sensitive to Moho structure and can be used to identify effectively of Moho structure.
Key words ：
Moho structure
reflectivity method
the ratio of PmP and Pn’s amplitude
theoretical seismograms
forward modeling
Received: 30 January 2014
Published: 21 April 2014
Cite this article:
Fan Xiaoyi,Wang Fuyun. AN ALGORITHM FITTING THE RATIO OF PmP AND Pn’s WAVE
AMPLITUDE FOR STUDYING MOHO STRUCTURE[J]. jgg, 2014, 34(2): 84-89.
Fan Xiaoyi,Wang Fuyun. AN ALGORITHM FITTING THE RATIO OF PmP AND Pn’s WAVE
AMPLITUDE FOR STUDYING MOHO STRUCTURE[J]. jgg, 2014, 34(2): 84-89.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2014/V34/I2/84
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