Berkeley Seismological Lab (BSL) and EPS Postdoctoral Researcher Guang Zhai, ASU Professor Manoochehr Shirzaei, and EPS Professor Michael Manga publish a research article which demonstrates the deep seismic effects of shallow wastewater injection from industrial activity in western Texas in the journal Proceedings of the National Academy of Sciences (PNAS): Widespread deep seismicity in the Delaware Basin, Texas, is mainly driven by shallow wastewater injection