Madagascar Field Survey after the December 2004 Indian Ocean Tsunami

The effects of the 26 December 2004 Indian Ocean tsunami on the island of Madagascar were surveyed in July and August of 2005. Runup and inundation were obtained at 52 sites, covering most of the eastern coast of the country, ranging from a maximum runup of 5.4 m in the south to locations where the tsunami was not observed by eyewitnesses present on the day of the event. The data set is characterized by significant heterogeneity, suggesting the importance of local factors in controlling runup. The report of a 50-m vessel breaking its moorings in the port of Toamasina several hours after the maximum visible activity of the wave underscores the complexity of harbor responses and the need to re-evaluate civil defense policies in port environments. Important factors are how the Malagasy population responded to the warning issued during the Nias earthquake, on 28 March 2005, and the hazard posed to Madagascar by possible future mega-earthquakes in south Sumatra.

[1]  H. Fritz,et al.  Somalia Field Survey after the December 2004 Indian Ocean Tsunami , 2006 .

[2]  Hermann M. Fritz,et al.  Oman Field Survey after the December 2004 Indian Ocean Tsunami , 2006 .

[3]  E. Okal,et al.  Rodrigues, Mauritius, and Réunion Islands Field Survey after the December 2004 Indian Ocean Tsunami , 2006 .

[4]  E. Okal,et al.  A seismological reassessment of the source of the 1946 Aleutian 'tsunami' earthquake , 2006 .

[5]  W. Iwan.  Preface to the Special Issue on the Great Sumatra Earthquakes and Indian Ocean Tsunamis of 26 December 2004 and 28 March 2005 , 2006 .

[6]  R. Kerr.  Model Shows Islands Muted Tsunami After Latest Indonesian Quake , 2005, Science.

[7]  John McCloskey,et al.  Indonesian earthquake: Earthquake risk from co-seismic stress , 2005, Nature.

[8]  C. Chapman.  The Asian tsunami in Sri Lanka: A personal experience , 2005 .

[9]  Fumihiko Imamura,et al.  Tsunamis in the Sea of Marmara - Historical documents for the past, models for the future , 2002 .

[10]  Steven M. Day,et al.  The 1999 İzmit, Turkey, Earthquake: A 3D Dynamic Stress Transfer Model of Intraearthquake Triggering , 2002 .

[11]  R. Lawrence Edwards,et al.  Submergence and uplift associated with the giant 1833 Sumatran subduction earthquake: Evidence from coral microatolls , 1999 .

[12]  Ruth A. Harris,et al.  Introduction to Special Section: Stress Triggers, Stress Shadows, and Implications for Seismic Hazard , 1998 .

[13]  James H. Dieterich,et al.  Progressive failure on the North Anatolian fault since 1939 by earthquake stress triggering , 1997 .

[14]  Walter H. F. Smith,et al.  Free software helps map and display data , 1991 .

[15]  Ari Ben-Menahem,et al.  Amplitude patterns of tsunami waves from submarine earthquakes , 1972 .

[16]  V. Sundar,et al.  Modeling of the Indian Ocean Tsunami , 2007 .

[17]  Emile A. Okal,et al.  Seismology: Speed and size of the Sumatra earthquake , 2005, Nature.

[18]  Costas E. Synolakis,et al.  1992–2002: Perspective on a Decade of Post-Tsunami Surveys , 2005 .

[19]  K. Sieh,et al.  Seismology: Earthquake risk on the Sunda trench , 2005, Nature.