posted on Jan, 6 2009 @ 01:38 PM
So here is an interesting thought about the geyser. If you look at the seismic station at old-faithful you don't see the same characteristic
signature as what we're calling the suspected geyser under the lake, even when it erupts. The sensitivity is 125 microvolts/division so it is set up
to be even more sensitive than the lake station. So why do we not see the same signature?
A few theories:
1) The geology is different at the 2 locations, leading to a different level of propagation through the rocks to the station at old-faithful
2) Old faithful doesn't make as much 'noise' b/c it is an old geyser with worn 'smooth' walls in the vent whereas the lake geyser is a new geyser
and the walls of the vent haven't had time to smooth, thus leading to more noise.
3) The geyser in the lake is much bigger/has a higher discharge than old-faithful.
4) Could there be some other cause of the rumbling under the lake?