Travel time delay for a tsunami has been an increasingly important issue in recent years.The delay in time is calculated from a difference in arrival times between simulated waveforms and waves recorded by DART and gauge stations.In this Changing Cushion study, we estimate travel times for the 2011 Tohoku, the 2014 Iquique, the 2004 Aceh, and the 2010 Mentawai events.
We compare estimated travel times with travel times from field records and find that the time delay is increasing with epicentral distance, following reduced speeds copyright Rangehood Vent Adaptor during propagation.From analyses of the delays, we conclude that speed reduction in the Pacific is 1-2% from the long-wave speed but twice larger or more in the Indian Ocean due to its complex bathymetry.For far-field propagation in the Pacific, the delays could be approximately 17 minutes whereas the same amount of delay was attained at a shorter distance in the Indian Ocean.