Back Projection
View Back Projections at http://www.iris.edu/spud/backprojection
The Back Projection (BP) product shows the beamformed time history and location of coherent short period P-wave energy generated by large earthquakes observed at three regional arrays and across the Global Seismic Network. These are generated following all global M6.5+ earthquakes. The back projections typically take less than 10 minutes to compute, however arrival of event triggers, travel time of P-waves, downloading of data and shared DMC computing resources delays publication of results in SPUD to about an hour after origin time. These are fully automated and not reviewed by a human. Questions or suggestions? Email: Alex Hutko Citation for this product: Trabant, C, Hutko. A.R., Bahavar, M., Karstens, R., Ahern, T. and Aster, R. (2012) Data products at the IRIS DMC: stepping-stones for research and other applications. Seismo. Res. Lett., accepted. These back projections are good for:
These back projections are not good for:
Data selection:Back projection processing:Stacking:
Peak Amplitude vs Time:Artifacts (technical):Array Response Function:Local Maxima:References:
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