Abstract
The great Sumatra–Andaman earthquake and Indian Ocean tsunami of 2004 came as a surprise to most of the earth science community. Although it is now widely recognized that the risk of another giant earthquake is high off central Sumatra1, just east of the 2004 earthquake, there seems to be relatively little concern about the subduction zone to the north, in the northern Bay of Bengal along the coast of Myanmar. Here I show that similar indicators suggest a high potential for giant earthquakes along the coast of Myanmar. These indicators include the tectonic environment, which is similar to other subduction zones that experience giant megathrust earthquakes, stress and crustal strain observations, which indicate that the seismogenic zone is locked, and historical earthquake activity, which indicates that giant tsunamigenic earthquakes have occurred there in the past. These are all consistent with active subduction in the Myanmar subduction zone and I suggest that the seismogenic zone extends beneath the Bengal Fan. I conclude therefore that giant earthquakes probably occur off the coast of Myanmar, and that a large and vulnerable population is thereby exposed to a significant earthquake and tsunami hazard.
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References
Natawidjaja, D. H. et al. Source parameters of the great Sumatra megathrust earthquakes of 1797 and 1833 inferred from coral microatolls. J. Geophys. Res. 111 doi: 10.1029/2005JB004025 (2006)
Satyabala, S. P. Subduction in the Indo-Burma region: Is it still active? Geophys. Res. Lett. 25, 3189–3192 (1998)
Guzmn-Speziale, M. & Ni, J. F. Comment on “Subduction in the Indo-Burmese region: Is it still active?” by S. P. Satyabala. Geophys. Res. Lett. 27, 1065–1066 (2000)
Le Dain, A. Y., Tapponier, P. & Molnar, P. Active faulting and tectonics of Burma and the surrounding regions. J. Geophys. Res. 89, 453–472 (1984)
Ni, J. F. et al. Accretionary tectonics of Burma and the three-dimensional geometry of the Burma subduction zone. Geology 17, 68–71 (1989)
Kamesh Raju, K. A., Murty, G. P. S., Amarnath, D. & Mohan Kumar, M. L. The west Andaman fault and its influence on the aftershock pattern of the recent megathrust earthquakes in the Andaman-Sumatra region. Geophys. Res. Lett. 34 doi: 10.1029/2006GL028730 (2007)
Scholl, D. Sediment influx to subduction zone and great magnitude earthquakes; an observational appraisal. In Tsunami Sources Workshop Proceedings (US Geological Survey, Menlo Park, California, 21–22 April 2006)
Alam, M., Alam, M. M., Curray, J. R., Rahman Chowdhury, M. L. & Royhan Gani, M. An overview of the sedimentary geology of the Bengal Basin in relation to the regional tectonic framework and basin-fill history. Sedim. Geol. 155, 179–208 (2003)
Wang, K., Hyndman, R. D. & Yamamoto, M. Thermal regime of the southwest Japan subduction zone: effects of age history of the subducting plate. Tectonophysics 248, 53–69 (1995)
Kahn, A. A. Tectonics of the Bengal Basin. J. Himal. Geol. 2, 91–101 (1991)
Acharyya, S. Break-up of the greater Indo-Australian continent and accretion of blocks framing south and east Asia. J. Geodyn. 26, 149–170 (1998)
Nielson, C., Chamot-Rooke, N. & Rangin, C. & the ANDAMAN Cruise Team. the ANDAMAN Cruise Team. From partial to full strain partitioning along the Indo-Burmese hyper-oblique subduction. Mar. Geol. 209, 303–327 (2004)
Gowd, T. N., Srirama Rao, S. V. & Gaur, V. K. Tectonic stress field in the Indian subcontinent. J. Geophys. Res. 97, 11879–11888 (1992)
Socquet, A. et al. India and Sunda plates motion and deformation along their boundary in Myanmar determined by GPS. J. Geophys. Res. 111 doi: 10.1029/2005JB003877 (2006)
Wang, K. & He, J. Mechanics of low stress forearcs: Nankai and Cascadia. J. Geophys. Res. 104, 15191–15206 (1999)
Ruff, L. Do trench sediments affect great earthquake occurrence in subduction zones? Pure Appl. Geophys. 129, 263–282 (1989)
Vigny, C. et al. Present-day crustal deformation around Sagaing fault, Myanmar. J. Geophys. Res. 108 doi: 10.1029/2002JB001999 (2003)
Halsted, E. P. Report on the Island of Cheduba. J. Asiatic Soc. Bengal 114, 319–446 (1843)
Hirst, W. An Account of an Earthquake at Chattigaon: translated from the Persian by Mr. Edward Gulston, in the Service of the Honourable East India Company, and Communicated by Him to the Reverend Mr. Hirst. Phil. Trans. R. Soc. Lond. 8, 251 (1763)
Oldham, T. A catalogue of Indian earthquakes from the earliest time to the end of A.D. 1869. Mem. Geol. Surv. India 19, 163–215 (1883)
Ando, M. Source mechanisms and tectonic significance of historical earthquakes along the Nankai Trough, Japan. Tectonophysics 27, 119–140 (1975)
Chavez, M. & Castro, R. Attenuation of Modified Mercalli Intensity with distance in Mexico. Bull. Seismol. Soc. Am. 78, 1875–1884 (1988)
Acknowledgements
Among the many colleagues at Geoscience Australia who offered support and advice, I especially thank C. Collins for discussions about the 1762 Arakan earthquake and Bengal during the colonial era, and M. Hollow for help locating many of the historical references. I am also grateful to K. Sieh and C. Vigny for their thorough and constructive reviews.
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Cummins, P. The potential for giant tsunamigenic earthquakes in the northern Bay of Bengal. Nature 449, 75–78 (2007). https://doi.org/10.1038/nature06088
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DOI: https://doi.org/10.1038/nature06088
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