Multisegment rupture in the 11 July 1889 Chilik earthquake ( M w 8.0-8.3), Kazakh Tien Shan, interpreted from remote sensing, field survey, and paleoseismic trenching: THE M w 8.0-8.3 CHILIK EARTHQUAKE

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dc.contributor.authorAbdrakhmatov, K E
dc.contributor.authorWalker, R T
dc.contributor.authorCampbell, G E
dc.contributor.authorCarr, A S
dc.contributor.authorElliott, A
dc.contributor.authorHillemann, C
dc.contributor.authorHollingsworth, J
dc.contributor.authorLandgraf, A
dc.contributor.authorMackenzie, D
dc.contributor.authorMukambayev, A
dc.contributor.authorRizza, M
dc.contributor.authorSloan, R A
dc.date.accessioned2021-10-08T07:08:10Z
dc.date.available2021-10-08T07:08:10Z
dc.date.issued2016
dc.description.abstractThe 11 July 1889 Chilik earthquake (M-w 8.0-8.3) forms part of a remarkable sequence of large earthquakes in the late nineteenth and early twentieth centuries in the northern Tien Shan. Despite its importance, the source of the 1889 earthquake remains unknown, though the macroseismic epicenter is sited in the Chilik valley, similar to 100 km southeast of Almaty, Kazakhstan (similar to 2 million population). Several short fault segments that have been inferred to have ruptured in 1889 are too short on their own to account for the estimated magnitude. In this paper we perform detailed surveying and trenching of the similar to 30 km long Saty fault, one of the previously inferred sources, and find that it was formed in a single earthquake within the last 700 years, involving surface slip of up to 10 m. The scarp-forming event, likely to be the 1889 earthquake, was the only surface-rupturing event for at least 5000 years and potentially for much longer. From satellite imagery we extend the mapped length of fresh scarps within the 1889 epicentral zone to a total of similar to 175 km, which we also suggest as candidate ruptures from the 1889 earthquake. The 175 km of rupture involves conjugate oblique left-lateral and right-lateral slip on three separate faults, with step overs of several kilometers between them. All three faults were essentially invisible in the Holocene geomorphology prior to the last slip. The recurrence interval between large earthquakes on any of these faults, and presumably on other faults of the Tien Shan, may be longer than the timescale over which the landscape is reset, providing a challenge for delineating sources of future hazard.
dc.identifier.apacitationAbdrakhmatov, K. E., Walker, R. T., Campbell, G. E., Carr, A. S., Elliott, A., Hillemann, C., ... Sloan, R. A. (2016). Multisegment rupture in the 11 July 1889 Chilik earthquake ( M w 8.0-8.3), Kazakh Tien Shan, interpreted from remote sensing, field survey, and paleoseismic trenching: THE M w 8.0-8.3 CHILIK EARTHQUAKE. <i>Journal of Geophysical Research - Solid Earth</i>, 121(6), 4615 - 4640. http://hdl.handle.net/11427/34514en_ZA
dc.identifier.chicagocitationAbdrakhmatov, K E, R T Walker, G E Campbell, A S Carr, A Elliott, C Hillemann, J Hollingsworth, et al "Multisegment rupture in the 11 July 1889 Chilik earthquake ( M w 8.0-8.3), Kazakh Tien Shan, interpreted from remote sensing, field survey, and paleoseismic trenching: THE M w 8.0-8.3 CHILIK EARTHQUAKE." <i>Journal of Geophysical Research - Solid Earth</i> 121, 6. (2016): 4615 - 4640. http://hdl.handle.net/11427/34514en_ZA
dc.identifier.citationAbdrakhmatov, K.E., Walker, R.T., Campbell, G.E., Carr, A.S., Elliott, A., Hillemann, C., Hollingsworth, J. & Landgraf, A. et al. 2016. Multisegment rupture in the 11 July 1889 Chilik earthquake ( M w 8.0-8.3), Kazakh Tien Shan, interpreted from remote sensing, field survey, and paleoseismic trenching: THE M w 8.0-8.3 CHILIK EARTHQUAKE. <i>Journal of Geophysical Research - Solid Earth.</i> 121(6):4615 - 4640. http://hdl.handle.net/11427/34514en_ZA
dc.identifier.issn2169-9313
dc.identifier.issn2169-9356
dc.identifier.ris TY - Journal Article AU - Abdrakhmatov, K E AU - Walker, R T AU - Campbell, G E AU - Carr, A S AU - Elliott, A AU - Hillemann, C AU - Hollingsworth, J AU - Landgraf, A AU - Mackenzie, D AU - Mukambayev, A AU - Rizza, M AU - Sloan, R A AB - The 11 July 1889 Chilik earthquake (M-w 8.0-8.3) forms part of a remarkable sequence of large earthquakes in the late nineteenth and early twentieth centuries in the northern Tien Shan. Despite its importance, the source of the 1889 earthquake remains unknown, though the macroseismic epicenter is sited in the Chilik valley, similar to 100 km southeast of Almaty, Kazakhstan (similar to 2 million population). Several short fault segments that have been inferred to have ruptured in 1889 are too short on their own to account for the estimated magnitude. In this paper we perform detailed surveying and trenching of the similar to 30 km long Saty fault, one of the previously inferred sources, and find that it was formed in a single earthquake within the last 700 years, involving surface slip of up to 10 m. The scarp-forming event, likely to be the 1889 earthquake, was the only surface-rupturing event for at least 5000 years and potentially for much longer. From satellite imagery we extend the mapped length of fresh scarps within the 1889 epicentral zone to a total of similar to 175 km, which we also suggest as candidate ruptures from the 1889 earthquake. The 175 km of rupture involves conjugate oblique left-lateral and right-lateral slip on three separate faults, with step overs of several kilometers between them. All three faults were essentially invisible in the Holocene geomorphology prior to the last slip. The recurrence interval between large earthquakes on any of these faults, and presumably on other faults of the Tien Shan, may be longer than the timescale over which the landscape is reset, providing a challenge for delineating sources of future hazard. DA - 2016 DB - OpenUCT DP - University of Cape Town IS - 6 J1 - Journal of Geophysical Research - Solid Earth LK - https://open.uct.ac.za PY - 2016 SM - 2169-9313 SM - 2169-9356 T1 - Multisegment rupture in the 11 July 1889 Chilik earthquake ( M w 8.0-8.3), Kazakh Tien Shan, interpreted from remote sensing, field survey, and paleoseismic trenching: THE M w 8.0-8.3 CHILIK EARTHQUAKE TI - Multisegment rupture in the 11 July 1889 Chilik earthquake ( M w 8.0-8.3), Kazakh Tien Shan, interpreted from remote sensing, field survey, and paleoseismic trenching: THE M w 8.0-8.3 CHILIK EARTHQUAKE UR - http://hdl.handle.net/11427/34514 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34514
dc.identifier.vancouvercitationAbdrakhmatov KE, Walker RT, Campbell GE, Carr AS, Elliott A, Hillemann C, et al. Multisegment rupture in the 11 July 1889 Chilik earthquake ( M w 8.0-8.3), Kazakh Tien Shan, interpreted from remote sensing, field survey, and paleoseismic trenching: THE M w 8.0-8.3 CHILIK EARTHQUAKE. Journal of Geophysical Research - Solid Earth. 2016;121(6):4615 - 4640. http://hdl.handle.net/11427/34514.en_ZA
dc.publisher.departmentDepartment of Geological Sciences
dc.publisher.facultyFaculty of Science
dc.sourceJournal of Geophysical Research - Solid Earth
dc.source.journalissue6
dc.source.journalvolume121
dc.source.pagination4615 - 4640
dc.source.urihttps://dx.doi.org/10.1002/2015JB012763
dc.subject.otherScience &
dc.subject.otherTechnology
dc.subject.otherPhysical Sciences
dc.subject.otherGeochemistry &
dc.subject.otherGeophysics
dc.subject.otherSTRIKE-SLIP-FAULT
dc.subject.otherSTRUCTURE-FROM-MOTION
dc.subject.otherSURFACE RUPTURE
dc.subject.otherSEISMIC-HAZARD
dc.subject.other1992 SUUSAMYR
dc.subject.otherRATES
dc.subject.otherLUMINESCENCE
dc.subject.otherDEFORMATION
dc.subject.otherKYRGYZSTAN
dc.subject.otherMONGOLIA
dc.subject.otherJournal Article
dc.titleMultisegment rupture in the 11 July 1889 Chilik earthquake ( M w 8.0-8.3), Kazakh Tien Shan, interpreted from remote sensing, field survey, and paleoseismic trenching: THE M w 8.0-8.3 CHILIK EARTHQUAKE
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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