Seismology: Earthquake risk on the Sunda trench

  title={Seismology: Earthquake risk on the Sunda trench},
  author={Suleyman S. Nalbant and Sandy Steacy and Kerry Sieh and Danny Hilman Natawidjaja and John McCloskey},
On 28 March 2005 the Sunda megathrust in Indonesia ruptured again, producing another great earthquake three months after the previous one. The rupture was contiguous with that of the December 2004 Sumatra–Andaman earthquake, and is likely to have been sparked by local stress, although the triggering stresses at its hypocentre were very small — of the order of just 0.1 bar. Calculations show that stresses imposed by the second rupture have brought closer to failure the megathrust immediately to… Expand
Tidal synchronicity of the 26 December 2004 Sumatran earthquake and its aftershocks
[1] The frequency of earthquake incidence along the Andaman/Sunda/Java Trench plate-boundary region has been investigated for the ten-lunar-month period 28 October 2004–19 August 2005, encompassingExpand
Structural context of the great Sumatra-Andaman Islands earthquake
[1] A new three-dimensional seismic model and relocated regional seismicity are used to illuminate the great Sumatra-Andaman Islands earthquake of December 26, 2004. The earthquake initiated whereExpand
Regional Seismic Hazard Posed by the Mentawai Segment of the Sumatran Megathrust
Several lines of evidence have indicated that the Mentawai segment of the Sumatran megathrust is very likely to rupture within the next few decades. The present study is to investigate seismic hazardExpand
The Tectonic Framework of the Sumatran Subduction Zone
The great Aceh-Andaman earthquake of December 26, 2004 and its tragic consequences brought the Sumatran region and its active tectonics into the world’s focus. The plate tectonic setting of SumatraExpand
Stress and Seismicity Changes on the Sunda Megathrust Preceding the 2007 Mw 8.4 Earthquake
Abstract The Bengkulu M w  8.4 earthquake on 12 September 2007, close in time and space to the 2004 M w  9.2 Sumatra–Andaman and 2005 M w  8.7 Nias megathrust events, suggests that it could be aExpand
Ultralong Period Seismic Study of the December 2004 Indian Ocean Earthquake and Implications for Regional Tectonics and the Subduction Process
Analysis of the earth's longest period normal modes shows that the December 2004 Sumatra-Andaman earthquake was much larger (Mw 9.3) than ini- tially inferred from surface-wave data and involved slipExpand
The Far Reach of Megathrust Earthquakes: Evolution of Stress, Deformation and Seismicity Following the 2004 Sumatra-Andaman Rupture
Starting with the 2004 Mw 9.2 megathrust event, Southeast Asia has been home to an exceptional amount of seismic activity over the past eight years. The series of megathrust earthquakes have beenExpand
Tsunami inundation modeling for western Sumatra
The authors' models of historical and future tsunamis confirm a substantial exposure of coastal Sumatran communities to tsunami surges, and suggest that potential losses could be as great as those that occurred in Aceh in 2004. Expand
Lessons Learned from the 2004 Sumatra-Andaman Megathrust Rupture
The 2004 Sumatra-Andaman earthquake has been extensively studied because of its great size and devastating consequences. Large amounts of highquality seismic, geodetic, and geologic data have led toExpand
Continued Earthquake Hazard in Northern Sumatra
The occurrence of two large earthquakes (Mw = 8.4 and Mw = 7.9) along the Sumatran west coast on 12 September 2007 as well as an Mw = 7.4 event on 20 February 2008 have again put the high earthquakeExpand


Indonesian earthquake: Earthquake risk from co-seismic stress
This work has calculated the distributions of co-seismic stress on the contiguous Sunda trench subduction zone, as well as on the neighbouring, vertical strike–slip Sumatra fault, and finds an increase in stress on both structures that significantly boosts the already considerable earthquake hazard posed by them. Expand
Progressive failure on the North Anatolian fault since 1939 by earthquake stress triggering
SUMMARY 10 M ≥ 6.7 earthquakes ruptured 1000 km of the North Anatolian fault (Turkey) during 1939–1992, providing an unsurpassed opportunity to study how one large shock sets up the next. We useExpand
Seismic history and seismotectonics of the Sunda Arc
Historic records of the last 300 years reveal two great interplate earthquakes (1833, MW = 8¾ 1861, MW = 8¼–8½), which ruptured major segments of the Sumatra fore arc in western Indonesia; aExpand
Viscosity of oceanic asthenosphere inferred from remote triggering of earthquakes
The postseismic stress evolution across the northern Pacific and Arctic basins is consistent with triggering of oceanic intraplate earthquakes, temporal patterns in seismicity at remote plate boundaries, and space-based geodetic measurements of anomalous velocity over an area 7000 by 7000 kilometers square during the 30-year period after the sequence. Expand
A Comparative Study of the Sumatran Subduction-Zone Earthquakes of 1935 and 1984
A M_s 7.7 earthquake struck the western, equatorial coast of Sumatra in December 1935. It was the largest event in the region since the two devastating giant earthquakes of 1833 and 1861. HistoricalExpand
The 1995 Kobe, Japan, earthquake: A long-delayed aftershock of the offshore 1944 Tonankai and 1946 Nankaido earthquakes
The 1995 Kobe earthquake produced predominantly right-lateral slip along the northeast-southwest-trending Nojima fault approximately 200 km landward of the Nankai trough, southwest Japan. The lastExpand
Paleogeodetic records of seismic and aseismic subduction from central Sumatran microatolls, Indonesia
We utilize coral microatolls in western Sumatra to document vertical deformation associated with subduction. Microatolls are very sensitive to fluctuations in sea level and thus act as natural tideExpand
List of Table Table 1 Hypocentral stresses in the Sumatran earthquake
  • Science 280,
  • 1998