Only four LIGO leaders know when such injections are made, and that information is supposed to be revealed only after a potential signal has been thoroughly scrutinized and written up for publication. (sciencemag.org)
In particular, saline injections can dampen pain if a person has recently received shots of morphine, a powerful analgesic, and has thereby associated such injections with pain relief. (scientificamerican.com)
Understanding how the injected fluid will spread through pores in rock, perhaps displacing water, is essential in predicting how stable such injections may be. (sciencedaily.com)