Nicholas van der Elst
Nicholas Van der Elst is a scientist in the Earthquake Hazards Program.
Science and Products
Filter Total Items: 33
Isolated cases of remote dynamic triggering in Canada detected using cataloged earthquakes combined with a matched-filter approach Isolated cases of remote dynamic triggering in Canada detected using cataloged earthquakes combined with a matched-filter approach
Here we search for dynamically triggered earthquakes in Canada following global main shocks between 2004 and 2014 with MS > 6, depth 0.2 cm/s. We use the Natural Resources Canada (NRCan) earthquake catalog to calculate β statistical values in 1° × 1° bins in 10 day windows before and after the main shocks. The statistical analysis suggests that triggering may occur near Vancouver Island...
Authors
Wang Bei, Rebecca M. Harrington, Yajing Liu, Hongyu Yu, Alex Carey, Nicholas van der Elst
Larger aftershocks happen farther away: nonseparability of magnitude and spatial distributions of aftershocks Larger aftershocks happen farther away: nonseparability of magnitude and spatial distributions of aftershocks
Aftershocks may be driven by stress concentrations left by the main shock rupture or by elastic stress transfer to adjacent fault sections or strands. Aftershocks that occur within the initial rupture may be limited in size, because the scale of the stress concentrations should be smaller than the primary rupture itself. On the other hand, aftershocks that occur on adjacent fault...
Authors
Nicholas van der Elst, Bruce E. Shaw
Complex faulting associated with the 22 December 2003 Mw 6.5 San Simeon California, earthquake, aftershocks and postseismic surface deformation Complex faulting associated with the 22 December 2003 Mw 6.5 San Simeon California, earthquake, aftershocks and postseismic surface deformation
We use data from two seismic networks and satellite interferometric synthetic aperture radar (InSAR) imagery to characterize the 22 December 2003 Mw 6.5 San Simeon earthquake sequence. Absolute locations for the mainshock and nearly 10,000 aftershocks were determined using a new three-dimensional (3D) seismic velocity model; relative locations were obtained using double difference. The...
Authors
Marcia K. McLaren, Jeanne L. Hardebeck, Nicholas van der Elst, Jeffrey R. Unruh, Gerald W. Bawden, J. Luke Blair
Science and Products
Filter Total Items: 33
Isolated cases of remote dynamic triggering in Canada detected using cataloged earthquakes combined with a matched-filter approach Isolated cases of remote dynamic triggering in Canada detected using cataloged earthquakes combined with a matched-filter approach
Here we search for dynamically triggered earthquakes in Canada following global main shocks between 2004 and 2014 with MS > 6, depth 0.2 cm/s. We use the Natural Resources Canada (NRCan) earthquake catalog to calculate β statistical values in 1° × 1° bins in 10 day windows before and after the main shocks. The statistical analysis suggests that triggering may occur near Vancouver Island...
Authors
Wang Bei, Rebecca M. Harrington, Yajing Liu, Hongyu Yu, Alex Carey, Nicholas van der Elst
Larger aftershocks happen farther away: nonseparability of magnitude and spatial distributions of aftershocks Larger aftershocks happen farther away: nonseparability of magnitude and spatial distributions of aftershocks
Aftershocks may be driven by stress concentrations left by the main shock rupture or by elastic stress transfer to adjacent fault sections or strands. Aftershocks that occur within the initial rupture may be limited in size, because the scale of the stress concentrations should be smaller than the primary rupture itself. On the other hand, aftershocks that occur on adjacent fault...
Authors
Nicholas van der Elst, Bruce E. Shaw
Complex faulting associated with the 22 December 2003 Mw 6.5 San Simeon California, earthquake, aftershocks and postseismic surface deformation Complex faulting associated with the 22 December 2003 Mw 6.5 San Simeon California, earthquake, aftershocks and postseismic surface deformation
We use data from two seismic networks and satellite interferometric synthetic aperture radar (InSAR) imagery to characterize the 22 December 2003 Mw 6.5 San Simeon earthquake sequence. Absolute locations for the mainshock and nearly 10,000 aftershocks were determined using a new three-dimensional (3D) seismic velocity model; relative locations were obtained using double difference. The...
Authors
Marcia K. McLaren, Jeanne L. Hardebeck, Nicholas van der Elst, Jeffrey R. Unruh, Gerald W. Bawden, J. Luke Blair