The global reach of the 26 December 2004 Sumatra tsunami.
نویسندگان
چکیده
Numerical model simulations, combined with tide-gauge and satellite altimetry data, reveal that wave amplitudes, directionality, and global propagation patterns of the 26 December 2004 Sumatra tsunami were primarily determined by the orientation and intensity of the offshore seismic line source and subsequently by the trapping effect of mid-ocean ridge topographic waveguides.
منابع مشابه
The great Sumatra-Andaman earthquake of 26 December 2004.
The two largest earthquakes of the past 40 years ruptured a 1600-kilometer-long portion of the fault boundary between the Indo-Australian and southeastern Eurasian plates on 26 December 2004 [seismic moment magnitude (Mw) = 9.1 to 9.3] and 28 March 2005 (Mw = 8.6). The first event generated a tsunami that caused more than 283,000 deaths. Fault slip of up to 15 meters occurred near Banda Aceh, S...
متن کاملSolid Earth Deformations Induced by the Sumatra Earth- quakes of 2004-2005: GPS Detection of Co-Seismic Displace- ments and Tsunami-Induced Loading
The two great Sumatra earthquakes of December 26, 2004, and March 28, 2005, are associated with a number of geodynamic processes affecting Earth’s shape, gravity field and rotation on a wide range of spatial and temporal scales. These include co-seismic strong motion, permanent co-seismic displacements, surface loading due to the barotropic tsunami, normal modes, and transient post-seismic defo...
متن کاملWavelet analysis of the seismograms of the 2004 Sumatra- Andaman earthquake and its application to tsunami early warning
[1] We applied the wavelet transform in an attempt to detect long-period components early in a seismogram. We analyzed the displacement seismograms of the 26 December 2004 Sumatra-Andaman earthquake (Mw = 9.2) and the 28 March 2005 Nias earthquake (Mw = 8.7). Wavelet analysis is able to clearly distinguish the amplitudes of the long-period W phase between the seismograms of the two earthquakes ...
متن کاملRapid determination of earthquake magnitude using GPS for tsunami warning systems
[1] The 26 December 2004 Sumatra earthquake (Mw 9.2–9.3) generated the most deadly tsunami in history. Yet within the first hour, the true danger of a major oceanwide tsunami was not indicated by seismic magnitude estimates, which were far too low (Mw 8.0–8.5). This problem relates to the inherent saturation of early seismicwave methods. Here we show that the earthquake’s true size and tsunami ...
متن کاملImplications of the 26 December 2004 Sumatra–Andaman Earthquake on Tsunami Forecast and Assessment Models for Great Subduction-Zone Earthquakes
Results from different tsunami forecasting and hazard assessment models are compared with observed tsunami wave heights from the 26 December 2004 Indian Ocean tsunami. Forecast models are based on initial earthquake information and are used to estimate tsunami wave heights during propagation. An empirical forecast relationship based only on seismic moment provides a close estimate to the observ...
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ورودعنوان ژورنال:
- Science
دوره 309 5743 شماره
صفحات -
تاریخ انتشار 2005