Novosibirsk, Arab seismologists solve mystery of 'singing earthquakes' in Egypt
NOVOSIBIRSK. Oct 12 (Interfax) - Novosibirsk State University researchers and their colleagues from King Saud University (Saudi Arabia) have discovered the source of mysterious underground noise accompanied by tremors in the Red Sea in the Abu Dabab area of Egypt, the Novosibirsk State University press service has said.
"They have explained why the sound of earthquakes is audible there although a human ear usually does not hear it," the report said.
A crack that goes into the Red Sea and is constantly filled with water is situated in that area. There is a five-kilometer-thick 'cap' above the crack, which consists of rock erupted hundreds of millions of years ago. The water serves as a sort of lubricant, and the monolith cap does not break when the crack shifts. The cap is solid, and the seismic signal practically does not attenuate inside it.
"It thus delivers the sound of an earthquake to the surface in the band audible to humans, which explains the underground noise," the report said.
