What’s this signal? Train? Electronics?

Posted on November 18, 2019 by Kristi Fink

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For several weeks TXESP has observed an odd and interesting seismic signal recorded on the EQ-1 seismograph. During the 15:00 UTC hour (locally 9:00 am CST), we observe the seismogram shown below. We are curious if this mysterious, consistent recording is detecting a local scheduled train? ground motion caused by the pool circulating on a program? pumpin at the nearest water station (less than 5km away)? What does it look like to you? Our guess is the train although we have been unsuccessful locating the nearest railroad crossing’s train schedule (its privately owned).