whooooosh·9개월 전·discussMore like 'related'.That's a statement from the PSF.This is a personal blog post of one of its board members.
whooooosh·9개월 전·discussYou can look on youtube for any number of videos showing you what it sounds like to be near one of these centers.For example,https://www.youtube.com/watch?v=AHPKPmoW910