Thomas Goebel

TL;DR: In this article, the authors examined triggering mechanisms of induced earthquakes, which occurred at more than 40 km from wastewater disposal wells in the greater Fairview region, northwest Oklahoma, employing numerical and semi-analytical poroelastic models.

TL;DR: Goebel et al. as mentioned in this paper investigated variations in seismic b value of acoustic emission events during the stress buildup and release on laboratory-created fault zones, and showed that b values mirror periodic stress changes that occur during series of stick-slip events, and are correlated with stress over many seismic cycles.

TL;DR: In this article, the authors show that the largest earthquakes observed at fluid injection sites are consistent with the sampling statistics of the Gutenberg-Richter distribution for tectonic earthquakes, assuming no upper magnitude bound.

TL;DR: Analysis of spatial seismicity decay in a global dataset of 18 induced cases with clear association between isolated wells and earthquakes finds far-reaching spatial effects during injection may increase event magnitudes and seismic hazard beyond expectations based on purely pressure-driven seismicity.

TL;DR: In this article, the authors studied stick-slip sequences in an analog, laboratory setting to investigate how microseismicity is linked to fault heterogeneities and the occurrence of dynamic slip events, and found that geometric asperities identified in CT scan images were connected to regions of low b values, increased event densities and moment release over multiple stick slip cycles.