Shear-wave Velocities in the D” Layer beneath the Indian-Eurasian Plate Collision Zone (2009-2018)

Shear-wave Velocities in the D” Layer beneath the Indian-Eurasian Plate Collision Zone (2009-2018)


We use waveform cross-correlation to analyze the recordings of eight earthquakes (2009-2018) beneath the Indian Ocean at stations from the Chinese Digital Seismic Network. We obtain 929 high quality residual traveltime differences between the phases ScS and S (Differential traveltimes.dat). We interpret variations of δt up to 10 seconds as due to horizontal shear-velocity variations in D” beneath northern India, Nepal, and southwestern China. The shear velocity can vary by as much as 7% over distances shorter than 300 km. Our observations provide additional observational evidence that compositional heterogeneity and possibly melt contribute to the seismic structure of the lower mantle characterized by long-term subduction and mantle downwelling.


File naming and required software

File name: Differential traveltimes.dat;
Data reading method: The data can be opened directly with a text program (such as Notepad). Except for the header file, the main content is the ScS-S travel time residuals and its corresponding shear wave velocities.


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Cite as:

Li, G., Bai, L. (2020). Shear-wave Velocities in the D” Layer beneath the Indian-Eurasian Plate Collision Zone (2009-2018). A Big Earth Data Platform for Three Poles, DOI: 10.11888/Geo.tpdc.270369. CSTR: 18406.11.Geo.tpdc.270369. (Download the reference: RIS | Bibtex )

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References literature

1.Li, G., Bai, L., & Ritsema, J. (2020). Lateral Variations of Shear‐Wave Velocity in the D″ Layer Beneath the Indian‐Eurasian Plate Collision Zone. Geophysical Research Letters. 47. 10.1029/2019GL086856. (View Details )


Support Program

National Natural Science Foundation of China (No:41761144076)

National Natural Science Foundation of China (No:41804083)

National Science Foundation (No:EAR-1644829)

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License: This work is licensed under an Attribution 4.0 International (CC BY 4.0)


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Keywords
Geographic coverage
East: 90.00 West: 65.00
South: 15.00 North: 40.00
Details
  • Temporal resolution: 1 year < x < 10 year
  • Spatial resolution: 10km - 100km
  • File size: 0.03 MB
  • Views: 2819
  • Downloads: 351
  • Access: Open Access
  • Temporal coverage: 2009-01-06 To 2019-01-05
  • Updated time: 2022-04-15
Contacts
: LI Guohui   BAI Ling  

Distributor: A Big Earth Data Platform for Three Poles

Email: poles@itpcas.ac.cn

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