Lawrence Livermore National Laboratory



Download open-source version (~95 MB)

What does the Coda Calibration Tool do?

The Coda Calibration Tool (CCT) is an application for calibrating 1D shear wave coda measurement models to observed data using a much smaller set of reference moment magnitudes calculated from other means (waveform modeling, etc.). These calibrated measurement models can then be used in other tools to generate coda moment magnitude MW measurements, source spectra, estimated stress drop, and other useful measurements against the rest of the events and any new data collected in the calibrated region.

These calibrated measurement models can then be used in other tools to generate coda MW measurements, source spectra, estimated stress drop, and other useful measurements against the rest of the events and any new data collected in the calibrated region.

Code

CCT is built on Java and works on Windows, Linux, and OS-X. Java 8 with JavaFX 8 or higher support is required for CCT.

Examples

Examining path effect corrections made during calibration.

Computed per-site corrections and measured magnitudes.

Waveform quality and measurement inspection.

Additional Reading

Mayeda, K. M., A. Hofstetter, J. L. O'Boyle, and W. R. Walter (2003). Stable and transportable regional magnitudes based on coda-derived moment-rate spectra, Bull. Seism. Soc. Am., 93, 224-239.

CCT is available under the Apache v2 software license.

Download software license