Rapid detection and characterization of large earthquakes using quasi-finite-source Green's functions in continuous moment tensor inversion
Article first published online: 15 JUL 2011
Copyright 2011 by the American Geophysical Union.
Geophysical Research Letters
Volume 38, Issue 13, July 2011
How to Cite
2011), Rapid detection and characterization of large earthquakes using quasi-finite-source Green's functions in continuous moment tensor inversion, Geophys. Res. Lett., 38, L13318, doi:10.1029/2011GL047550., and (
- Issue published online: 15 JUL 2011
- Article first published online: 15 JUL 2011
- Manuscript Revised: 25 MAY 2011
- Manuscript Accepted: 25 MAY 2011
- Manuscript Received: 23 MAR 2011
- earthquake detection;
- moment tensor inversion;
 Large earthquakes along subduction zones have the potential to generate tsunamis along local coasts, as well as traveling far across oceans. By continuously inverting for moment tensors we show that it is possible with a single procedure to automatically detect, locate and determine source parameters of any earthquake, from magnitude 3.5 to larger than 8 located in both the near- and far-field. We find that the detection and characterization of large earthquakes is improved when quasi-finite-source Green's functions are used in a point-source moment tensor approach as they represent to some extent the rupture's finiteness and directivity. Solutions can be obtained within several minutes after the origin time of the earthquake, and could therefore be used as part of a near-source tsunami early warning system, capable of providing tens of minutes of possible warning depending on the distance of the earthquake rupture from the coast.