The range of 60-70 decibels sound pressure level is about as loud as normal conversation in 1 meter distance. The distance from the ears to the sound source is very important to the value of the SPL. Scroll down to related links and look at Table of Sound Pressure Levels.
1 Primarily, during the fracking process:  [Earthquakes] were caused by fluid injection during hydraulic fracturing in proximity to pre-existing faults.. 2  Secondarily, via the disposal of fracking wastewater via underground injection.
Benefits of fracking. December 12, 2014, subhasish, Comments Off on Benefits of fracking. Fracking which is also known as hydraulic fracturing, hydrofracking, hydrofacturing or fraccing is a popular and a controversial well stimulation technique that is used for fracturing rocks by a hydraulically pressurized liquid. Amidst nature, certain veins on the rocks and dikes are examples of hydraulic fracturing in its natural form.