A Caltech Library Service

Real-time forecasting of the April 11, 2012 Sumatra tsunami

Wang, Dailin and Becker, Nathan C. and Walsh, David and Fryer, Gerard J. and Weinstein, Stuart A. and McCreery, Charles S. and Sardiña, Victor and Hsu, Vindell and Hirshorn, Barry F. and Hayes, Gavin P. and Duputel, Zacharie and Rivera, Luis and Kanamori, Hiroo and Koyanagi, Kanoa K. and Shiro, Brian (2012) Real-time forecasting of the April 11, 2012 Sumatra tsunami. Geophysical Research Letters, 39 (19). Art. No. L19601. ISSN 0094-8276.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


The April 11, 2012, magnitude 8.6 earthquake off the northern coast of Sumatra generated a tsunami that was recorded at sea-level stations as far as 4800 km from the epicenter and at four ocean bottom pressure sensors (DARTs) in the Indian Ocean. The governments of India, Indonesia, Sri Lanka, Thailand, and Maldives issued tsunami warnings for their coastlines. The United States' Pacific Tsunami Warning Center (PTWC) issued an Indian Ocean-wide Tsunami Watch Bulletin in its role as an Interim Service Provider for the region. Using an experimental real-time tsunami forecast model (RIFT), PTWC produced a series of tsunami forecasts during the event that were based on rapidly derived earthquake parameters, including initial location and Mwp magnitude estimates and the W-phase centroid moment tensor solutions (W-phase CMTs) obtained at PTWC and at the U. S. Geological Survey (USGS). We discuss the real-time forecast methodology and how successive, real-time tsunami forecasts using the latest W-phase CMT solutions improved the accuracy of the forecast.

Item Type:Article
Related URLs:
URLURL TypeDescription
Rivera, Luis0000-0002-0726-5445
Kanamori, Hiroo0000-0001-8219-9428
Additional Information:This paper is not subject to U.S. copyright. Published in 2012 by the American Geophysical Union. Received 13 July 2012; revised 24 August 2012; accepted 24 August 2012; published 2 October 2012. We thank Laura Kong for her support throughout the RIFT development. We thank George Choy of USGS for helpful comments. We thank Dominique Reymond and an anonymous reviewer for their constructive comments and suggestions, which helped improve the paper. The Editor thanks Dominique Reymond and an anonymous reviewer for assisting in the evaluation of this paper.
Subject Keywords:natural hazard, numerical modeling, oceanography, tsunami
Issue or Number:19
Record Number:CaltechAUTHORS:20121109-143516932
Persistent URL:
Official Citation: Wang, D., et al. (2012), Real-time forecasting of the April 11, 2012 Sumatra tsunami, Geophys. Res. Lett., 39, L19601, doi:10.1029/2012GL053081.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35398
Deposited By: Ruth Sustaita
Deposited On:13 Nov 2012 15:48
Last Modified:09 Mar 2020 13:19

Repository Staff Only: item control page