1 / 17

Empirical Constraints on Broadband Array Designs

Empirical Constraints on Broadband Array Designs. Charles A. Langston Center for Earthquake Research and Information University of Memphis. Outline. Broadband array designs – IRIS 2012 meeting Using TA to answer: How coherent are teleseismic body waves?. Array Design Criteria.

june
Download Presentation

Empirical Constraints on Broadband Array Designs

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Empirical Constraints on Broadband Array Designs Charles A. Langston Center for Earthquake Research and Information University of Memphis

  2. Outline • Broadband array designs – IRIS 2012 meeting • Using TA to answer: How coherent are teleseismic body waves?

  3. Array Design Criteria Station spacing Array Diameter Wave Correlation Distance (as determined from regional arrays)

  4. Sierpinski Gasket Fractal D=1.58

  5. Is For teleseismic body waves? • Important for: • Array Design • Transfer function analysis

  6. Use TA to get basic data on wave coherency

  7. 449 Vertical P Waves

  8. Procedure Correct for instrument response

  9. Two Analyses • Fixed time windows • -30s to +90s after IASPEI91 P wave arrival time • -60s to +120s after IASPEI91 S wave arrival time • Time window inversely proportional to band pass center frequency

  10. Conclusions • Teleseismic vertical P waveforms show the highest coherence with interstation distance supporting both large aperture, broadband teleseismic array experiments and stacking strategies for receiver functions. • S waves also show reasonable coherence supporting construction of useful large arrays. • Coherence is somewhat degraded for propagation through the upper mantle.

More Related