[Rockhounds] Using whale songs to image beneath the ocean’s floor

[Tim Fisher]

Finally, OSU geology is getting some outside funding. I bet they didn't even
have to pay in fish :D

Tim Fisher
Http://OreRockOn.com 
Email nospam at orerockon.com

-----Original Message-----
From: Rockhounds [mailto:rockhounds-bounces at rockhounds.drizzle.com] On
Behalf Of Kreigh Tomaszewski
Sent: Thursday, February 11, 2021 3:14 PM
To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
Subject: [Rockhounds] Using whale songs to image beneath the ocean’s floor

People tend to think of seismic waves as little more than signals of
tectonic events, like an earthquake or lava shifting under a volcano. But
these vibrations are also our best way of getting a clear picture of our
planet's internal structure. By watching how the vibrations' paths shift as
they encounter different materials, we can get a picture of where different
rock layers meet, where rock becomes molten, and more.

In some cases, we get this picture by waiting for a natural event to produce
the seismic waves. In others, we get impatient and set off explosive charges
or use a powerful sound-making device. Today, Václav Kuna and John Nábėlek
of Oregon State University are describing yet another
option: waiting for a whale to float by. Using the songs of passing fin
whales, the researchers were able to reconstruct the upper layers of the
seafloor off the coast of Oregon.

https://arstechnica.com/science/2021/02/using-whale-songs-to-image-beneath-t
he-oceans-floor/
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