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Wide area seismic detection

  • US 9,435,902 B2
  • Filed: 09/16/2010
  • Issued: 09/06/2016
  • Est. Priority Date: 09/18/2009
  • Status: Active Grant
First Claim
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1. A method of monitoring an area of interest for an earthquake comprising:

  • operating at least one distributed acoustic sensor interrogator unit connected to an optical fibre communications infrastructure to provide fibre optic distributed acoustic sensing on one or more optical fibres of said optical fibre communications infrastructure,wherein each distributed acoustic sensor interrogator unit is connected to a respective optical fibre within a respective optical fibre bundle of said communications infrastructure and at least one other optical fibre of said optical fibre bundle is connected to a communications node operating to transfer data which is not related to monitoring the area of interest via the optical fibre bundle; and

    processing signals detected by said at least one distributed acoustic sensor interrogator unit to detect signals indicative of an earthquake.

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