anchor.diff:  OPHC,10,Ophero,Short Period,,2001-01-10T01:16:00Z,2001-06-24T00:10:00Z
   OPRZ,10,Ohinepanea Seismic,,,2006-11-14T01:00:00Z,9999-01-01T00:00:00Z
   OPUO,10,Opuha,Portable,,2014-10-14T23:05:00Z,2015-04-10T02:30:00Z
  -OPZ,10,"Highcliff Hill, Dunedin",,,2008-06-27T01:30:00Z,9999-01-01T00:00:00Z
  -OPZ,20,"Highcliff Hill, Dunedin",,,2008-06-27T01:30:00Z,2017-06-26T02:00:00Z
  +OPZ,10,"Highcliff Hill, Dunedin",,0,2008-06-27T01:30:00Z,9999-01-01T00:00:00Z
  +OPZ,20,"Highcliff Hill, Dunedin",,3,2008-06-27T01:30:00Z,2017-06-26T02:00:00Z
   ORAA,10,Orari River,Short Period,,1995-11-16T00:00:01Z,1996-04-18T23:59:59Z
   ORE,10,Oreore,Short Period,,1990-05-15T03:55:00Z,1990-05-17T05:08:00Z
   OT001,01,Waimangu Inferno Crater,,,2017-12-06T00:30:00Z,9999-01-01T00:00:00Z
  
positive.code: ARPA,10,Arthurs Pass,,,1995-11-11T00:00:01Z,1996-04-07T23:59:59Z
  ARPC,10,Lake Arapuni Road,Short Period,,2001-01-19T23:54:00Z,2001-07-04T07:21:00Z
  ASHV,10,Ash Pit Road,Short Period,,1995-01-11T00:56:00Z,1995-05-28T18:20:00Z
  AUCT,40,Devonport Naval Base,,,2009-03-26T00:00:00Z,9999-01-01T00:00:00Z
  AUCT,41,Devonport Naval Base,,,2009-03-26T00:00:00Z,9999-01-01T00:00:00Z
  AVIO,10,Aviemore,Portable,,2014-09-17T22:30:00Z,2015-04-15T00:00:00Z
  AVNE,10,Avondale,Short Period,,1994-07-24T04:56:00Z,1994-12-12T02:13:00Z
  AVOA,10,Avoca River,Short Period,,1994-06-22T02:04:00Z,1994-07-05T21:39:00Z
  
negative.code: NGI,10,Ngariki Road,Short Period,,1989-08-17T01:06:00Z,1989-08-21T18:45:00Z
  NGRZ,10,Ngongotaha,,,2011-10-26T00:15:00Z,9999-01-01T00:00:00Z
  NGRZ,10,Ngongotaha,Portable,,2011-05-11T00:05:00Z,2011-05-11T01:00:00Z
  NGZ,10,Ngauruhoe Seismic Station,,0,2004-03-04T23:00:00Z,9999-01-01T00:00:00Z
  NGZ,11,Chateau Observatory,Telemetry,,2004-03-04T23:00:00Z,2005-08-30T20:10:00Z
  NGZ,30,Ngauruhoe Seismic Station,,3,2014-02-25T03:00:00Z,9999-01-01T00:00:00Z
  NMCM,10,No Man's Creek,Short Period,,1993-10-21T02:48:00Z,1994-03-04T00:18:00Z
  NMEZ,10,Namu Road,,,2009-04-02T04:00:00Z,9999-01-01T00:00:00Z
  NMHZ,10,Naumai,,,2008-02-13T03:01:00Z,9999-01-01T00:00:00Z
  NNVZ,10,North Ngauruhoe,,,2015-03-27T03:00:00Z,2020-02-24T13:15:00Z
  NNZ,10,Logan Vale Farm,,0,2003-08-12T00:00:00Z,9999-01-01T00:00:00Z
  NNZ,20,Logan Vale Farm,,3,2003-08-12T00:00:00Z,2012-01-05T23:00:00Z
  NOVZ,10,North Ngauruhoe,,0,2020-02-25T01:10:00Z,9999-01-01T00:00:00Z
  NOVZ,30,North Ngauruhoe,,3,2020-02-25T01:10:00Z,9999-01-01T00:00:00Z
  NOZ,10,Mangatuna,Short Period,,1989-04-17T07:59:00Z,2004-04-02T14:14:00Z
  NRZ,10,Ngariki Road,Short Period,,1997-03-26T08:06:00Z,2003-12-16T04:24:00Z
  NRZ,11,Taranaki Emergency Management Office,,,1997-03-27T15:13:00Z,2003-12-16T04:24:00Z
  NRZ,12,Taranaki Emergency Management Office,EARSS Network,,1991-02-21T19:09:00Z,1993-07-26T13:23:00Z
  NRZ,13,Taranaki Emergency Management Office,EARSS Network,,1993-12-14T23:52:00Z,1997-03-25T08:58:00Z
  NRZ,14,Taranaki Emergency Management Office,,,1993-07-29T09:36:00Z,1997-03-18T22:51:00Z
  NSDF,10,Nancy Sound,Short Period,,2003-08-24T05:07:00Z,2003-09-11T03:43:00Z
  NTVZ,10,North Tongariro,,0,2014-11-07T00:45:00Z,9999-01-01T00:00:00Z
  NTVZ,30,North Tongariro,,3,2016-01-14T02:10:00Z,9999-01-01T00:00:00Z
  NTVZ,31,North Tongariro,,4,2016-01-14T02:10:00Z,9999-01-01T00:00:00Z
  NTVZ,32,North Tongariro,,5,2016-01-14T02:10:00Z,9999-01-01T00:00:00Z
  NWEZ,10,Newall Road,,,2008-01-22T19:00:01Z,2012-10-16T00:00:00Z
  OAKV,10,Ohakune Comms Hub,Short Period,,1995-09-26T07:39:00Z,1995-10-25T17:55:00Z
  OBZ,10,Oban DoC Ranger Station,Short Period,,1990-09-11T06:29:00Z,1990-09-16T22:56:00Z
  ODZ,10,Otahua Downs,,0,2003-09-11T06:00:00Z,9999-01-01T00:00:00Z
  ODZ,10,Otahua Downs,Short Period,,1990-08-31T03:13:00Z,2003-09-10T23:57:00Z
  ODZ,20,Otahua Downs,,3,2003-09-11T06:00:00Z,2017-06-28T20:15:00Z
  OGWZ,10,Otaki Gorge,,,2007-09-24T01:15:00Z,9999-01-01T00:00:00Z
  OHAA,10,Ohau,Short Period,,1995-11-17T00:00:01Z,1996-04-15T23:59:59Z
  OHPV,10,McDougal Quarry Road,Short Period,,1995-01-17T04:04:00Z,1995-04-29T14:01:00Z
  