I live in San Francisco / Bay Area...northern California. People for months say they keep hearing some kind of "roar". I never heard it and skeptical about it. This week though, I do notice things are a bit "louder' than usual. Like the every day noise is echoed in the air. Like the noise continues for longer than normal. Anyway, hope nothing come of it and if it does, hope all will be safe and the family and friends as well.