Alexander R. Hutko's research while affiliated with University of Washington Seattle and other places

... To generate the synthetic wa veforms, w e used a Green's functions database computed for AK135f using the spectral element solv er AxiSEM (Nissen-Me yer et al. 2014 ), obtained from the IRIS DMC Syngine web service (Krischer et al. 2017 ), and parsed using Instaseis for efficient buffered I/O ( van Driel et al. 2015 ). The Green's functions in the database are accurate down to periods of 2 s. ...

... Seismic networks produce catalogs that are often the basis of other products relating to seismic hazards, making the accuracy and reliability of catalogs crucial. Considering the power law increase of the volume of seismic data in recent years (e.g., Hutko et al., 2017), there is an urgent need for improved algorithms to process seismograms for event detection. ...

... To date, such tsunami scenario faults have been proposed to rupture individually, and triggering or simultaneous ruptures along with other adjacent scenario faults with considerably different fault geometries have not been specifically supposed. However, multiplex rupturing across a complex fault network or segmented multi-fault triggering has been reported for earthquakes in variable tectonic environments (e.g., Fan et al., 2017;Hamling et al., 2017;Kuge et al., 1996;Lay et al., 2018;Nissen et al., 2016;Satriano et al., 2012;Vasyura-Bathke et al., 2024;. This can result in diverse rupture behaviors, including the rupture of faults with conjugate dip directions and apparent backward rupture propagation. ...

... The 3D models of isotropic V P , azimuthal anisotropy, and radial anisotropy (RAN) determined by this study can be obtained from the website (doi: 10.5281/zenodo.10677143). The tomographic models of previous studies were obtained from the Earth Model Collaboration repository of the Incorporated Research Institutions for Seismology (IRIS; Trabant et al., 2012; https:// ds.iris.edu/ds/products/emc-earthmodels). The Generic Mapping Tool (GMT) software package (Wessel et al., 2019) is available at https:// github.com/GenericMappingTools/. The information about ISC earthquake locations is available at http://www.isc.ac.uk. ...

... Backprojection is a primary array processing technique for imaging large earthquake rupture propagation, and its first application was to the 2004 Sumatra-Andaman earthquake (Ishii et al., , 2007. With the development of large-scale dense seismic networks or arrays, backprojection has proved to be a valuable technique for studying complex earthquake ruptures (e.g., Walker et al., 2005;Allmann and Shearer, 2007;Ishii, 2011, 2012;Koper et al., 2011;Meng et al., 2011;Wang et al., 2012), early aftershock detection (Fan and Shearer, 2017), hazard early warning (An and Meng, 2016), and body-wave microseism detection and source location (Zhang et al., 2009;Liu et al., 2016Liu et al., , 2020. Furthermore, significant efforts have been made to improve the accuracy and resolution of backprojection results. ...

... : 2020 50 1 [45]. , , . ...

... Another type of dispersive model called depth-integrated non-hydrostatic model, has comparable accuracy to the classical Boussinesq equations, but has no higher-order derivatives in the governing equations. This model can be solved efficiently and stably with a semi-implicit scheme (Stelling and Zijlema, 2003;Yamazaki et al., 2009), and has been used in many real events for modeling dispersive tsunamis (e.g., Lay et al., 2011;Bai et al., 2014;Aranguiz et al., 2019). Here, we develop our dispersive tsunami numerical model based on the depth-integrated non-hydrostatic model, and apply it to the high-resolution tsunami hazard assessment for the GBA. ...

... Tong et al. (2010) quantitatively derived the coseismic slip distribution based on the elastic dislocation model with a combination of GPS and ALOS data. Lay et al. (2010) inferred the finite-fault slip distribution using the teleseismic P, SH, and Rayleigh wave data. Delouis et al. (2010) presented the slip distribution based on the static and High-Rate GPS, teleseismic, and InSAR data. ...

... Various geophysical investigations have illuminated the structural alterations suffered by the incoming plate due to the vast number of extensional faulting and rupturing generated with the bending of the subducting plate (Fujie et al., 2013(Fujie et al., , 2018Grevemeyer et al., 2018;Key et al., 2012;Naif et al., 2015). Such alterations primarily include the breaking of the lithosphere (Abe, 1972;Lay et al., 2009) creating conduits for fluid migration, through extensive damage, into the previously intact rocks. This ultimately leads to serpentinization of the mantle, that has been well identified by V P /V S anomalies (e.g., Grevemeyer et al., 2018) and electrical resistivity anomalies (e.g., Naif et al., 2015). ...

... PcP waves experience more attenuative energy loss compared to direct P waves, and the resultant waveform differences need to be corrected to make the P and PcP stacks more comparable. Each P stack was convolved with a series of t* operators, ranging from 0.2 to 2.0, which represent progressively greater attenuation (16,21,(53)(54). The optimal t* operator is the one that creates an attenuated P-wave response that most closely matches the PcP signal (15). ...