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Monitoring a microseismic event

  • US 6,856,575 B2
  • Filed: 10/21/2003
  • Issued: 02/15/2005
  • Est. Priority Date: 10/21/2002
  • Status: Expired due to Fees
First Claim
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1. A method of monitoring a microseismic event, comprising:

  • detecting said event to produce a first signal dependent on said event, the first signal including noise at a frequency of f Hz;

    taking a first sample of said first signal;

    taking a second sample of said first signal, the second sample occurring n/f seconds after the first sample, where n is an integer; and

    subtracting the first and second samples from each other to produce a further signal dependent on said event in which said noise has been at least partly compensated for.

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