EPS C20 Lecture Notes - Lecture 13: Statistical Model, Water Table, Rocky Mountain Arsenal
17 Nov 2020
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~60 miles south of sf & oakland. San francisco county, bay bridge, alameda county, santa. Scientists aren"t the most skilled at communication. Dramatic change in way seismicity was being created. Rate increase is limited to a few areas. 1995 to 2015, induced earthquakes increased rapidly. Rate increase is limited to a few areas -- it"s exponential. By taking out hotspots, normal pattern is relevant again & natural seismicity hasn"t changed. Wastewater disposal is more likely to induce earthquakes! Tech to steer wells, horizon al long reach technology made it no longer vertical. Largest quake to occur m4. 9 a year after injection stopped. Azle, tx (nov 2013 - jan 2014) The timing & location of the seismicity matches areas of highest stress. Using statistical methods to forecast eq rates. We know that injection controls the seismicity. We don"t actually know where the faults are! More hf -- induced seismicity than we thought.
