This really is an amazing recording. It takes an unimaginable amount of energy and power to project a sound wave at what I'm guessing to be frequencies between 20hz-80hz at anywhere near +1 db, for a distance of 140 miles. There's likely a lot of stuff below 20hz but that's about the limit of what we can hear.
I did some more recording in this area Dec. 20-21 2009 so I'll have some more to add to this set soon. Besides the forest, I did some recording on the beach at night (wind, small creek) and huge waves crashing into a rocky headland.