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

Geophysical Research Letters

By:
, , , , , , and
DOI: 10.1029/2012GL053081

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Abstract

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.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Real-time forecasting of the April 11, 2012 Sumatra tsunami
Series title:
Geophysical Research Letters
DOI:
10.1029/2012GL053081
Volume
39
Issue:
19
Year Published:
2012
Language:
English
Publisher:
Wiley
Contributing office(s):
National Earthquake Information Center
Description:
6 p.; L19601
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geophysical Research Letters
Country:
Indonesia
Other Geospatial:
Sumatra