First research links California quakes in oil operations (Ellen KNICKMEYER, Associated Press ; February 4, 2016) http://bigstory.ap.org/article/a34e52dbfc0d4160911052821df8ed73/first-research-links-california-quakes-oil-operations Study: Oil field operations caused California Earthquakes (David R. BAKER, SFGate ; February 4, 2016) http://www.sfgate.com/business/article/Study-Oil-field-operations-caused-California-6808015.php Selected Articles : NEW : Oklahoma's induced seismicity strongly linked to wastewater injection depth (HINCKS et al. , 2018) http://science.sciencemag.org/content/early/2018/01/31/science.aap7911.full Human-Induced Earthquakes from Deep-Well Injection: A Brief Overview (FOLGER and TIEMANN, 2015) https://www.fas.org/sgp/crs/misc/R43836.pdf Myths and Facts on Waste Water Injection, Hydraulic Fracturing, Enhanced Oil Recovery, and Induced Seismicity (RUBINSTEIN and MAHANI, 2015) https://scits.stanford.edu/sites/defaul...