Bayou Corne: Seismograms supplemental

13 Feb 2013

It is reported that the heavy signal that we are seeing on the HHZ channels is works trucks. By selecting one at random and ‘tweaking’ the vertical scale so the signal is not so distorted we can see it much more clearly.

LA13.YC..HHZ.2013.043_h2400_s0.00004_w1200
(Click the image for a larger/clearer version)

I would not be prepared to categorically state that it is not ‘works trucks’ but I have my doubts. That it is anthropogenic is not in doubt however.

06 Feb 2013

Strange signal on two channels of LA13 on the 6th February.

Nothing out of the ordinary on the HH1 channel. The disturbance at the start is the Mag 8.0 in the Santa Cruz Islands.

LA13.YC..HH1.2013.037_h1200_s0.0001_w2000
(Click the image for a larger/clearer version)

This signal is visible on the HH2 channel and the HHZ channel, but if you look closely the signal is not the same on both.

HH2
LA13.YC..HH2.2013.037_h1200_s0.0001_w2000
(Click the image for a larger/clearer version)

HHZ
LA13.YC..HHZ.2013.037_h1200_s0.0001_w2000
(Click the image for a larger/clearer version)

This one shows the signal ‘self-scaled’ and it makes the pattern very clear.

HH2
webicorder_fLA13.YC..HH2.2013.037_h1200_w2000_not scaled
(Click the image for a larger/clearer version)

HHZ
LA13.YC..HHZ.2013.037_h1200_w2000_not scaled
(Click the image for a larger/clearer version)

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