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Frictional Afterslip Following the 2005 Nias-Simeulue Earthquake, Sumatra
Open accessAbstract
Continuously recording Global Positioning System stations near the 28 March 2005 rupture of the Sunda megathrust [moment magnitude ( M w ) 8.7] show that the earthquake triggered aseismic frictional afterslip on the subduction megathrust, with a major fraction of this slip in the up-dip direction from the main rupture. Eleven months after the main shock, afterslip continues at rates several times the average interseismic rate, resulting in deformation equivalent to at least a M w 8.2 earthquake. In general, along-strike variations in frictional behavior appear to persist over multiple earthquake cycles. Aftershocks cluster along the boundary between the region of coseismic slip and the up-dip creeping zone. We observe that the cumulative number of aftershocks increases linearly with postseismic displacements; this finding suggests that the temporal evolution of aftershocks is governed by afterslip.
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Cited by
The 2011 Magnitude 9.0 Tohoku-Oki Earthquake: Mosaicking the Megathrust from Seconds to Centuries
Simons, M., Minson, S. E., Sladen, A., Ortega, F., Jiang, J., Owen, S. E., Meng, L., Ampuero, J.-P., Wei, S., Chu, R., et al. (2011) · Science · doi:10.1126/science.1206731 · Cited by 774
Self-citationThe Politics of Uncertainty: Challenges of Transformation
Scoones, I., & Stirling, A. (2020) · doi:10.4324/9781003023845 · Cited by 158
Metadata
- Authors
- Hsu, Y.-J., Simons, M., Avouac, J.-P., Galetzka, J., Sieh, K., Chlieh, M., Natawidjaja, D., Prawirodirdjo, L., & Bock, Y.
- Venue
- Science
- Published
- 2006-06-30
- Volume
- 312
- Issue
- 5782
- Pages
- 1921-1926
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2137433526
- Cited by
- 554
- References
- 0
- FWCI
- 17.68
- Type
- journal article
- Language
- en
- Open access
- green
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- CoChat. (2026). Citation check: Frictional Afterslip Following the 2005 Nias-Simeulue Earthquake, Sumatra. https://app.cochat.ai/papers/10.1126/science.1126960
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- Hsu, Y.-J., Simons, M., Avouac, J.-P., Galetzka, J., Sieh, K., Chlieh, M., Natawidjaja, D., Prawirodirdjo, L., & Bock, Y. (2006). Frictional Afterslip Following the 2005 Nias-Simeulue Earthquake, Sumatra. Science. https://doi.org/10.1126/science.1126960
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