Pingie: HTTP:: Earth 039 s 039 Hum 039 Could Become Mars Mapping Tool

HTTP:: Earth 039 s 039 Hum 039 Could Become Mars Mapping Tool
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When our planet's hum was identified for the first time, many experts were puzzled by it. Some people even went as far as to panic and call it a sign of God. Over the years, as with all the superstitions, these ideas faded away, as science progressed. Now, we have come so far in studying this ultra-low frequency noise, that experts say it could potentially be used to map other planets as well. Mars is, obviously, the first choice, as it is within reach, and knowing its structure is important for future manned missions on its surface, Wired reports. What has been plastically termed the “background buzz of the globe” is generated by ocean-wave interactions, especially along the western seaboard of the United States, in the eastern Pacific. The vibration is far too low to be picked up by human ears, which make out sounds in the 20 hertz-20,000 hertz range. The hum can be identified at a measly ten millihertz, several times below our minimum limit. It's doubtful that ther!
e are living things on Earth that can make it out, scientists say. One of the phenomenon's most important and useful characteristics is that it slows down and speeds up as it moves through the planet's crust, depending on the sort of materials it comes across. When planetary scientists found that out, they used the sam...
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http://news.softpedia.com/news/Earth-039-s-039-Hum-039-Could-Become-Mars-Mapping-Tool-123239.shtml
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