Question #1: of these 100+ earthquakes, how many were generated from a depth equivalent to the common injection depth (approximately 10, 000 BSG)? How many quakes originated at depths never reached by drilling/fracking activities?
Question #2: Provided these injections “caused” minor eathquakes, can these not be attributed to “lubricating the slip and slide” of faults actually ^mitigating^ more severe earthquakes that would have caused disastrous results? Might this not be a beneficial activity in heavily faulted areas?
100 2.5+ earthquakes in OK in last 30 days. 9 were less than 10,000 ft below surface. Eight of these were in Grant County.
BTW: Same experience in Arkansas a few years back. Stopped deep well injection and the earthquakes stopped. Given the new waste water treatment systems coming on-line, deep well injection of fracking fluids will be a thing of the past soon.
Your question 2 has always been my first question. Another question - “did these earthquakes cause any damage or injuries?”.
The answer is probably no. So who knows, lubing up the plates may be preventing more damaging earthquakes.
Another important point, which I don’t think anti-frackers bother to understand - the energy that causes earthquakes comes primarily from the earth. The power of man-made equipment injecting fluids into the earth can move a little dirt...but nothing near the energy found in an earthquake.