Accession Number:

ADP204480

Title:

Simultaneous Inversion for Detailed Source and Structure Parameters Using Quarry Blast Data Recorded in Eastern Kazakhstan,

Descriptive Note:

Corporate Author:

COLORADO UNIV AT BOULDER

Personal Author(s):

Report Date:

1995-08-14

Pagination or Media Count:

11.0

Abstract:

We have completed a study aimed at the development of a full waveform joint structure-source inversion method. We used differential seismograms to represent the linearized structure effects and perturbed source terms to represent the source effects. We found it desirable to include unbalanced force terms, in addition to an arbitrary symmetric moment tensor, to represent the source. We also found it necessary to use exact expressions for computing the differential seismograms that did not involve eigenvalue-only approximations. We applied the inversion method to a dozen local quarry blasts recorded by the NRDC network in Kazakhstan in the 0.4 to 2.0 Hz frequency range. We found that it was possible to produce very good fits between the synthetic seismograms and the observed data on all three components simultaneously and for the P-wave, Rayleigh wave and Love wave. The inclusion of the unbalanced force terms significantly improved the fits for some of the events and resulted in more reasonable structure and source parameters than were obtained without the force terms. We interpreted some of the inverted source parameters as being characteristic of several different types of industrial surface mining operations.

Subject Categories:

  • Government and Political Science
  • Mining Engineering
  • Seismology
  • Seismic Detection and Detectors
  • Nuclear Weapons

Distribution Statement:

APPROVED FOR PUBLIC RELEASE