Earthquakes, Regular with the Same Waveforms?

Update: I was probably one of many who informed Stevens that the article on his site accusing some one of manipulating volcanoes was in error. What he was seeing was a calibration signal created by inducing a current in the seismometers coil. This is an automatic process and the resulting signal is used for quality control. He has pulled the article from his site for further investigation. (Note: I will never pull writing from my site. I will strike through my errors and correct the article.)

Scott Stevens at Weather Wars has a very thought provoking assertion: Someone is messing with our volcanoes!

What would you think if you were told that the currently erupting Augustine Volcano in Alaska was experiencing an unusual kind of earthquake every twelve hours to the second? That’s right, a very strange earthquake goes off on Augustine every twelve hours exactly to the second. What would you think if you were told that each of these unusual earthquakes lasted for exactly the same length of time, fifty-seconds for each and every event? What would you think if you were shown a collection of seismic waveforms for these precision earthquakes that were essentially identical?

He uses Mt Augustine as an example to show that every 12 hours it registers a quake on the seismometer and the waveform is almost exactly like the last. I checked on the seismographs for the other Alaskan mountains ans there are patterns of regularity in almost every one. Coming up is Gareloi 24 hour webicorder. It has shown regularity every 12 hours. At 2230 hours +18-19 minutes it registered a quake. Just now at 1030 hours +18-19 minutes, it registered a quake and the signature looks just like the one at 2230 hours.

Stevens also sees the same regularity in Northwest mountains.

The earthquakes from Mt. Rainier appear to occur every twelve hours with a variation of three seconds. The word ‘appear’ is used because none of the records available for these volcanoes is complete. The earthquakes from Mt. Baker appear to occur every twelve (or twenty-four} hours with a variation of twenty-seven seconds. The earthquakes from Mt. Hood appear to occur every twelve (or twenty-four} hours with a variation of two minutes. Within individual regions, the earthquake seismograms are remarkably similar. Each location has their own particular set of event times, and they are different for each location. Events are being shown from three locations to eliminate the possible judgment of ‘equipment malfunction.’

I honestly don’t know what to think. I am not convinced that a whole series of mountains could be that regular and have the same signature wave form each time.

geology earthquakes Scott Stevens

Update: I received an email from Bill Steele at The Pacific Northwest Seismograph Network

Mike,
What you are seeing is a calibration signal created by inducing a
current in the seismometers coil. This is an automatic process and the
resulting signal is used for quality control.
Good Eyes-
Bill

Ok conspiracy buffs, back to sleep!

Update:


5 Responses to “Earthquakes, Regular with the Same Waveforms?”

  1. Ron, I appreciate your reply. Just one question in follow up

    The notes on the Alaskan Volcano web site say “the calibration notices will always be in red and it gives a sample. The sample doesn’t look like the seismographs: javascript:popWin(‘/webicorders/webicorder_example.jpg’);

    Mover Mike

  2. These aren’t quakes – they’re electronic calibration pulses sent by the seismographs at regular intervals. You can find an explanation of this phenomenon on the USGS Alaska Volcano Observatory website here (about midway down the page): http://www.avo.alaska.edu/webicorders/about.php

  3. Again Ron, thanks for that info. As I said “conspiracy buffs, back to sleep!”

    BTW, do you see any increase in the levels of any of the stations in terms od seismic activity?

    Mover Mike

  4. Yup. They oughta be in red, and perhaps they once were. I suspect the explanation is slightly out of date when it comes to the color. Nevertheless, the signals in question are clearly calibration pulses, not quakes.

  5. I’ll defer to the USGS on that.

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