Here we go again!

LA12

LA12_afternoon

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LA14 is even WORSE!!

PuterMan from Quake Watch points out some interesting charts.

LA10seedplot

Science Group, Blue Ribbons, Sandia: you getting all this?

12 thoughts on “Here we go again!

    • we’ll never know what happened up there ….
      St. Louis dump fire seems bigger threat to Miss. River ….

    • I turn them into sound all the time. It is the way I identity a lot of the signals. My QVSData program has a sound section where you can convert SAC files to WAV files.

      On the page you linked they said “Mt. St. Helens seismograph readings at 30x speedup. Booming sounds are heartbeat quakes, with eerie wailing sounds forming a voice in the mountain. ”

      Wrong! The wailing sounds are a helicopter. I know that sound and signature well.

      And by the way, just in case you are wondering if I am right, that sound and signature were verified as a helicopter by PNSN. I have my own recordings of those sometime last year. You also get dam barrier opening and closing causing wailing sounds on Mt St Helens as well. You can see the signature (identical) that sparked the discussion with PNSN here: http://volcanowatcher.wordpress.com/notes-for-mt-st-helens-feb-2012-archive/

      That 2004 file has gone round the internet in various guises as Harmonic Tremor, and the author on the original site admits that it probably is not. Mt St Helens was active and was being observed – hence the helicopter noise. Somewhere I have an email form the seismologists at PNSN explaining how a helicopter can be ‘heard’ on a seismo, in other words what happens to the signal to enable it to be picked up on a seismogram.

  1. Every year Orca whales around the planet change part of their song. They sing the same song & change the same part at the same time planet-wide. Pretty cool. Listening to the Mt. St. Helens’ sounds makes me wonder if the whales are singing what they hear from the earth.

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