Encyclopedia of Earthquake Engineering

2015 Edition
| Editors: Michael Beer, Ioannis A. Kougioumtzoglou, Edoardo Patelli, Siu-Kui Au

Long-Period Moment-Tensor Inversion: The Global CMT Project

  • Göran EkströmEmail author
  • Meredith Nettles
Reference work entry
DOI: https://doi.org/10.1007/978-3-642-35344-4_291

Synonyms

Global centroid-moment-tensor inversion; Long-period earthquake analysis

Introduction

Long-period moment-tensor inversion is a methodology to estimate first-order earthquake parameters by inverse modeling of long-period seismograms, typically recorded at teleseismic distances. Data from large numbers of globally distributed digital broadband seismographs and knowledge of elastic wave propagation through the heterogeneous Earth currently make possible the uniform determination of moment tensors of earthquakes with M ≥ 5.0. The Global CMT Project is an ongoing systematic research effort to study all significant earthquakes occurring worldwide using long-period moment-tensor inversion and to maintain and curate a catalog of the resulting earthquake parameters.

Earthquakes are complex geophysical events with the potential to cause vast destruction. When and where earthquakes occur and a characterization of their size and effects form knowledge of scientific and societal value. For...

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References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Department of Earth and Environmental Sciences, Lamont-Doherty Earth ObservatoryColumbia UniversityPalisadesUSA