ORCID Profile
0000-0001-7080-183X
Current Organisation
Bogazici University
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Publisher: American Geophysical Union (AGU)
Date: 22-08-2014
DOI: 10.1002/2014GL060985
Publisher: Wiley
Date: 04-05-2023
DOI: 10.1002/ESSOAR.10512815.3
Abstract: Slow, aseismic slip plays a crucial role in the initiation, propagation and arrest of large earthquakes along active faults. In addition, aseismic slip controls the budget of elastic strain in the crust, hence the amount of energy available for upcoming earthquakes. The conditions for slow slip include specific material properties of the fault zone, pore fluid pressure and geometrical complexities of the fault plane. Fine scale descriptions of aseismic slip at the surface and at depth are key to determine the factors controlling the occurrence of slow, aseismic versus rapid, seismic fault slip. We focus on the spatial and temporal distribution of aseismic slip along the North Anatolian Fault, the plate boundary accommodating the 2 cm/yr of relative motion between Anatolia and Eurasia. Along the eastern termination of the rupture trace of the 1944 M7.3 Bolu-Gerede earthquake lies a segment that slips aseismically since at least the 1950’s. We use Sentinel 1 time series of displacement and GNSS data to provide a spatio-temporal description of the kinematics of fault slip. We show that aseismic slip observed at the surface is coincident with a shallow locking depth and that slow slip events with a return period of 2.5 years are restricted to a specific section of the fault. In the light of historical measurements, we discuss potential rheological implications of our results and propose a simple alternative model to explain the local occurrence of shallow aseismic slip at this location.
Publisher: Wiley
Date: 16-11-2022
Publisher: American Geophysical Union (AGU)
Date: 08-2009
DOI: 10.1029/2008JB006026
Publisher: American Geophysical Union (AGU)
Date: 06-2010
DOI: 10.1029/2009TC002482
Publisher: American Geophysical Union (AGU)
Date: 07-2009
DOI: 10.1029/2008JB006021
Publisher: Oxford University Press (OUP)
Date: 17-09-2013
DOI: 10.1093/GJI/GGT323
Publisher: Elsevier BV
Date: 06-2010
Publisher: American Association for the Advancement of Science (AAAS)
Date: 09-2000
DOI: 10.1126/SCIENCE.289.5484.1519
Abstract: We use Global Positioning System (GPS) observations and elastic half-space models to estimate the distribution of coseismic and postseismic slip along the Izmit earthquake rupture. Our results indicate that large coseismic slip (reaching 5.7 meters) is confined to the upper 10 kilometers of the crust, correlates with structurally distinct fault segments, and is relatively low near the hypocenter. Continued surface deformation during the first 75 days after the earthquake indicates an aseismic fault slip of as much as 0.43 meters on and below the coseismic rupture. These observations are consistent with a transition from unstable (episodic large earthquakes) to stable (fault creep) sliding at the base of the seismogenic zone.
Publisher: Seismological Society of America (SSA)
Date: 02-2002
DOI: 10.1785/0120000836
Publisher: Seismological Society of America (SSA)
Date: 02-2002
DOI: 10.1785/0120000833
Publisher: Seismological Society of America (SSA)
Date: 02-2002
DOI: 10.1785/0120000830
Publisher: American Geophysical Union (AGU)
Date: 07-2023
DOI: 10.1029/2022JB026018
Abstract: Slow, aseismic slip plays a crucial role in the initiation, propagation, and arrest of large earthquakes along active faults. In addition, aseismic slip controls the budget of elastic strain in the crust, hence the amount of energy available for upcoming earthquakes. The conditions for slow slip include specific material properties of the fault zone, pore fluid pressure, and geometrical complexities of the fault plane. Fine scale descriptions of aseismic slip at the surface and at depth are key to determine the factors controlling the occurrence of slow, aseismic versus rapid, seismic fault slip. We focus on the spatial and temporal distribution of aseismic slip along the North Anatolian Fault, the plate boundary accommodating the 2 cm/yr of relative motion between Anatolia and Eurasia. Along the eastern termination of the rupture trace of the 1944 M7.3 Bolu‐Gerede earthquake lies a segment that slips aseismically since at least the 1950s. We use Sentinel 1 time series of displacement and GNSS data to provide a spatio‐temporal description of the kinematics of fault slip. We show that aseismic slip observed at the surface is coincident with a shallow locking depth and that slow slip events with a return period of 2.5 years are restricted to a specific section of the fault. In the light of historical measurements, we discuss potential rheological implications of our results and propose a simple alternative model to explain the local occurrence of shallow aseismic slip at this location.
Publisher: Seismological Society of America (SSA)
Date: 02-2002
DOI: 10.1785/0120000837
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