Date of sounds: Aug
Location of sounds: Alhambra, California, USA
Secureteam10 states that in Alhambra, CA this week, strange noises are worrying the locals. This is the western side of Los Angeles and its not too far from the ocean. Its very possible that underground bases are being secretly built by the US military 2-3 miles below the surface that may cause cracking or even the use of explosives underground to make the tunnels. Do you remember that in Malibu, CA that an underwater alien base was discovered a few years ago? This might be the work of aliens making an enlarge base.
Scott C. Waring