Encyclopedia of Complexity and Systems Science

Living Edition
| Editors: Robert A. Meyers

Earthquake Source Parameters, Rapid Estimates for Tsunami Forecasts and Warnings

  • Barry HirshornEmail author
  • Stuart Weinstein
  • Dailin Wang
  • Kanoa Koyanagi
  • Nathan Becker
  • Charles McCreery
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27737-5_160-2
  • 11 Downloads

Glossary

CMT centroid moment tensor

The CMT represents properties of the earthquake source derived from the seismic displacement of the Earth’s crust that best reproduces the observed wave field generated by an earthquake and gives the average location in time and space of the earthquake energy release. The scalar seismic moment can be determined from the CMT.

Convolution

A type of integral transform combining two signals to form a third signal or output. The output signal is typically viewed as a modified version of one of the two original signals, giving the area overlap between the two signals as a function of one of the original signals is translated with respect to the other. It is the single most important technique in digital signal processing. In the case of seismology, the two signals can be, e.g., the ground motion as a function of time and the response of the seismometer, and the output is the seismogram.

Deconvolution

Does the reverse of convolution. In the case of...

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Notes

Acknowledgments

We thank Paula Dunbar of the National Geophysical Data Center for helping us obtain the data we needed and IRIS without which most of this work let alone a functioning TWC would not be possible. We also thank the PTWC for use of its facilities in preparing this manuscript.

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Copyright information

© Springer Science+Business Media LLC 2019

Authors and Affiliations

  • Barry Hirshorn
    • 1
    Email author
  • Stuart Weinstein
    • 2
  • Dailin Wang
    • 2
  • Kanoa Koyanagi
    • 2
  • Nathan Becker
    • 2
  • Charles McCreery
    • 2
  1. 1.NOAA/NWSEwa BeachUSA
  2. 2.NOAA/NWS/Pacific Tsunami Warning CenterEwa BeachUSA