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Volume 58 Supplement 2

Special Issue: The 2004 Great Sumatra Earthquake and Tsunami

The Great Tsunami of 26 December 2004: A description based on tide-gauge data from the Indian subcontinent and surrounding areas

Earth, Planets and Space volume 58, pages 211–215 (2006)Cite this article

Abstract

The Great Tsunami of 26 December 2004 is described using data from seven tide gauges in India and others from surrounding areas in the Indian Ocean. The tsunami struck the Indian east coast around 0330 UTC. The amplitude was 2 m above the tide at Chennai, Paradip, and Colombo. The east coast of India (and of Sri Lanka) was hit shortly after high tide; Tuticorin and Colombo, however, were hit shortly after low tide. The tsunami wave propagated northward along the Indian west coast. All these gauges are to the west of the earthquake zone and the detided sea levels show first a rise in sea level with the arrival of the tsunami, and then a sharp decrease. Spectral and wavelet analysis of the detided series show that the maximum amplitude was at a period of 35–45 minutes, with another maximum around 20 minutes. Along the Indian east coast, however, there is another broad peak between 1–2 hours within the first few hours after the first tsunami wave.

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Authors and Affiliations

  1. Geodetic and Research Branch, Survey of India, 17, E. C. Road, P. B. 77, Dehra Dun, Uttaranchal, 248001, India

    B. Nagarajan, R. Sharma & A. K. Lal

  2. National Institute of Oceanography, Dona Paula, Goa, 403004, India

    I. Suresh, D. Sundar, S. Neetu, S. S. C. Shenoi, S. R. Shetye & D. Shankar

Authors
  1. B. Nagarajan
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  2. I. Suresh
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  3. D. Sundar
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  4. R. Sharma
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  5. A. K. Lal
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  6. S. Neetu
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  7. S. S. C. Shenoi
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  8. S. R. Shetye
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  9. D. Shankar
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Corresponding author

Correspondence to D. Shankar.

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Nagarajan, B., Suresh, I., Sundar, D. et al. The Great Tsunami of 26 December 2004: A description based on tide-gauge data from the Indian subcontinent and surrounding areas. Earth Planet Sp 58, 211–215 (2006). https://doi.org/10.1186/BF03353380

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  • DOI: https://doi.org/10.1186/BF03353380

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