On 26 December 2004, a moment magnitude Mw = 9.3 earthquake occurred
along Northern Sumatra, the Nicobar and Andaman islands, resulting
in a devastating tsunami in the Indian Ocean region. The rapid and
accurate estimation of the rupture length and direction of such tsunami-generating
earthquakes is crucial for constraining both tsunami wave-height
models as well as the seismic moment of the events. Compressional
seismic waves generated at the hypocentre of the Sumatra earthquake
arrived after about 12 min at the broadband seismic stations of the
German Regional Seismic Network (GRSN), located approximately 9,000
km from the event. Here we present a modification of a standard array-seismological
approach and show that it is possible to track the propagating rupture
front of the Sumatra earthquake over a total rupture length of 1,150
km. We estimate the average rupture speed to be 2.3-2.7 km/s and
the total duration of rupture to be at least 430 s, and probably
between 480 and 500 s.
%0 Journal Article
%1 kruger_ohrnberger:2005
%A Krüger, Frank
%A Ohrnberger, Matthias
%D 2005
%I Nature Publishing Group
%J Nature
%K geophysics seismology
%N 7044
%P 937--939
%R 10.1038/nature03696
%T Tracking the rupture of the Mw = 9.3 Sumatra earthquake over 1,150
km at teleseismic distance
%U http://dx.doi.org/10.1038/nature03696
%V 435
%X On 26 December 2004, a moment magnitude Mw = 9.3 earthquake occurred
along Northern Sumatra, the Nicobar and Andaman islands, resulting
in a devastating tsunami in the Indian Ocean region. The rapid and
accurate estimation of the rupture length and direction of such tsunami-generating
earthquakes is crucial for constraining both tsunami wave-height
models as well as the seismic moment of the events. Compressional
seismic waves generated at the hypocentre of the Sumatra earthquake
arrived after about 12 min at the broadband seismic stations of the
German Regional Seismic Network (GRSN), located approximately 9,000
km from the event. Here we present a modification of a standard array-seismological
approach and show that it is possible to track the propagating rupture
front of the Sumatra earthquake over a total rupture length of 1,150
km. We estimate the average rupture speed to be 2.3-2.7 km/s and
the total duration of rupture to be at least 430 s, and probably
between 480 and 500 s.
@article{kruger_ohrnberger:2005,
abstract = {On 26 December 2004, a moment magnitude Mw = 9.3 earthquake occurred
along Northern Sumatra, the Nicobar and Andaman islands, resulting
in a devastating tsunami in the Indian Ocean region. The rapid and
accurate estimation of the rupture length and direction of such tsunami-generating
earthquakes is crucial for constraining both tsunami wave-height
models as well as the seismic moment of the events. Compressional
seismic waves generated at the hypocentre of the Sumatra earthquake
arrived after about 12 min at the broadband seismic stations of the
German Regional Seismic Network (GRSN), located approximately 9,000
km from the event. Here we present a modification of a standard array-seismological
approach and show that it is possible to track the propagating rupture
front of the Sumatra earthquake over a total rupture length of 1,150
km. We estimate the average rupture speed to be 2.3-2.7 km/s and
the total duration of rupture to be at least 430 s, and probably
between 480 and 500 s.},
added-at = {2012-09-01T13:08:21.000+0200},
author = {Kr\"{u}ger, Frank and Ohrnberger, Matthias},
biburl = {https://www.bibsonomy.org/bibtex/2514d131a512bffbf789241e140fafc62/nilsma},
day = 16,
doi = {10.1038/nature03696},
interhash = {347d973d48d322e58f093e348a362a64},
intrahash = {514d131a512bffbf789241e140fafc62},
issn = {0028-0836},
journal = {Nature},
keywords = {geophysics seismology},
month = may,
number = 7044,
pages = {937--939},
publisher = {Nature Publishing Group},
timestamp = {2021-02-09T13:25:06.000+0100},
title = {Tracking the rupture of the Mw = 9.3 Sumatra earthquake over 1,150
km at teleseismic distance},
url = {http://dx.doi.org/10.1038/nature03696},
volume = 435,
year = 2005
}