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We develop a rate- and state-dependent friction (RSF) model to investigate a compendium of recent laboratory experiments, in which precursory seismicity and slow slip was recorded from the same sec...

Special thanks to Derek Keir, Finnigan Illsley-Kemp (University of Southampton), Jose A. Lopez Comino (KAUST and now at University of Granada), and Kiran K. Thingbaijam (KAUST) for the fruitful discussions which include suggesting FI technique and enhancing the moment tensor inversion and stress drop analyses. We wish to thank Felix Waldhauser (Lamont Doherty Earth Observatory) for providing the latest unpublished version of his code (HypoDD of 2019). Our project received financial support from King Abdullah University of Science and technology (KAUST) under the CRG grant (ORS-2016-CRG5-3027-0). All waveform data were obtained through the Saudi Geological Survey (SGS) and is available from Harvard Dataverses webpage (https://doi.org/10.7910/dvn/kw4zfx).

Exploring the connections between injection wells and seismic migration patterns is key to understanding processes controlling growth of fluid-injection induced seismicity. Numerous seismic clusters in Oklahoma have been associated with wastewater disposal operations, providing a unique opportunity to investigate migration directions of each cluster with respect to the injection-well locations. We introduce new directivity migration parameters to identify and quantify lateral migration toward or away from the injection wells. We take into account cumulative volume and injection rate from multiple injection wells. Our results suggest a weak relationship between migration direction and the cluster-well distances. Migration away from injection wells is found for distances shorter than 5-13 km, while an opposite migration towards the wells is observed for larger distances, suggesting an increasing influence of poroelastic stress changes. This finding is more stable when considering cumulative injected volume instead of injection rate. We do not observe any relationship between migration direction and injected volume or equivalent magnitudes.