... Mediterranean Sea. Its southern sector has been the scene of three significant earthquakes in the past 30 yr, the 1994 M 5.9 and 2004 M 6.3 Al Hoceima and the 2016 M w 6.4 Alboran events. In this study, we perform a high‐precision relocation of a selected subset of moderate‐magnitude earthquakes of the three...

... km southwest of the M L 4.3 in 2023. We investigate activated faults relying on nonlinear relocations of the seismic sequences and probabilistic moment tensor inversion. The seismic sequences’ temporal evolution indicates a migration of seismic activity and a decrease of focal depths from northeast...

...Katherine M. Biegel; Jan Dettmer; Nadine Igonin; David W. Eaton Abstract Precise earthquake locations with well‐constrained uncertainties can improve our understanding of faulting. Double‐difference relocation methods, particularly event‐pair double‐difference relocations, are well established...

... and aftershocks were relocated by using iLoc, a state‐of‐the‐art single‐event location algorithm, and then by the multiple event location double‐difference algorithm, hypoDD. The improved earthquake relocations using iLoc and the double‐difference methods provide sharper lineation of seismicity and agree well...

... on the east and eastern China on the west. For nine earthquakes in two event sequences, the Lg ‐wave differential travel times of the nearby event pairs at the common station are carefully measured using the waveform cross‐correlation technique. The double‐difference earthquake relocation method is employed...

.... To create a comprehensive catalog, we combine the bulletins of local agencies and the International Seismological Centre, and use an advanced single‐event location algorithm, iLoc, to obtain better locations. We show that relocations with iLoc, using travel‐time predictions from the 3D upper mantle velocity...

...Daniel T. Trugman; Calum J. Chamberlain; Alexandros Savvaidis; Anthony Lomax Abstract Relative relocation techniques are widely used to improve the resolution of earthquake hypocenter positions. Here, we present GrowClust3D.jl—an open‐source software package written in the programming language...

... as part of a citizen seismology experiment to precisely relocate 2528 aftershocks from August to December 2021, and derive 1D P ‐ and S ‐crustal velocity models for this region. We show that the aftershocks delineate three north‐dipping structures with different strikes, located to the north of the EPG...

... in seismic characteristics. In this study, we use an existing 3D seismic velocity model and waveform cross‐correlation data to relocate the earthquakes in 2016 near the EAASZ. Our improved absolute and relative earthquake locations reveal complex spatial characteristics of double seismic zones (DSZs...

... aftershock data can constrain the fault structure to some extent, but only a handful of aftershocks were recorded by the China Earthquake Networks Center (CENC) in this case. To augment the CENC catalog, we first relocated aftershocks and then adopted them as templates to scan the continuous waveforms five...

... fault system. Here, we investigate the seismotectonic crustal structure of the island by interpreting the 3D compressional‐wave velocity V P and compressional‐ to shear‐wave velocity ratio V P / V S models and by analyzing the distribution of the relocated earthquakes. The 3D velocity models...

... was to gain insights into the seismotectonics of the Eagle Ford Shale play (EF), southern Texas, through relative relocation of earthquakes, assessment of CMT solutions, and investigation of the background stress field. Using Texas Seismological Network (TexNet) data from 2017 through 2019, we were able...

...., filtered by a minimum magnitude) in this area within the period January 2015–December 2018. Then, for comparing the reliability of the new 3D local model against a larger 3D regional model, we carried out a final relocation with all the earthquakes of the Spanish Seismic Catalog in the study area...

... in the event sizes reported by regional network catalogs. Joint use of multiple phases allows for the inclusion of more seismic events due to the increase in the number of observations. In some cases, using a single phase allowed us to relocate only 50% of the original reported seismic events within a cluster...

...Guoqing Lin Abstract I present a high‐precision earthquake relocation catalog and first‐motion focal mechanisms before and during the 2019 Ridgecrest earthquake sequence in eastern California. I obtain phase arrivals, first‐motion polarities, and waveform data from the Southern California...

... of the twentieth century, are still used today for building maps of epicenters of instrumental earthquakes. However, they are based on bulletins that did not use data from all seismic stations operating during that period, and on approximate ideas about the propagation of seismic waves in the Earth. We relocated...

... variation in lithospheric structure. Accurate earthquake locations are a prerequisite for better understanding of neotectonic activity driven by the movement of the Adriatic microplate and to facilitate seismic hazard studies. We relocate the seismicity recorded in the digital instrumental period between...

... event families based on signal‐correlation topology and analyze each event family by measuring differential arrival times of P and S waves. We relocate each family using the Bayesloc method ( Myers et al. , 2007 , 2009 ) and find that, after relocation, event families are tightly clustered spatially...

... by three moderate seismic events, which occurred 8 min after the explosion, on 23 September and 12 October 2017, respectively. The relocation suggests that the first postexplosion event occurred under the same mountain as the nuclear tests, but the other two events were located about 8 km to the northeast...

..., one of which regards the precise relocation of the hypocenters. In this study, hypocenter relocation was performed using a teleseismic double‐difference (DD) relocation method (teletomoDD) combining arrival times of P and S waves from stations at local, regional, and teleseismic distances. The catalog...