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The first step occurred between 08:00am and 09:00am Jan 14th, the second step between 07:00am and 08:00am Jan 16th (both times are GMT). I can find no evidence of a failure on January 14th, however it sure looks like there was one. On further inspection, it appears that this step only appears for the TENET target site (see below for the minimum RTTs measured each hour (0 1 ...) from SLAC to the target (Remote-Site)  on Jan 14th, 2020), and thus is not related to the cable problems.

Monitoring-Site           Remote-Site                 ?   0        1        2        3        4        5        6        7        8        9        10       11       12       13       14       15       16       17       18       19       20       21       22       23       Monitoring-Node           Mon-TLD  Mon-Region     Remote-Node                   Rem-TLD  Rem-Region  
EDU.SLAC.STANFORD.PINGER  ZABW.AC.NMMU.N1BAC.WWW               ?r  303323.254430  303323.259483  303323.252440  303323.242527  303323.222338  303323.224437  303318.260915  303318.255695  303320.253438  303343.287658  303345.260564  303331.199147  303343.190837  303326.171039  303331.267680  303321.228791  303321.282934  303321.280922  303322.265115  303321.179810  303321.139662  303321.188599  303321.173957  303321.249701  pinger.slac.stanford.edu  EDU      North_America  www.nmmubac.ac.zabw                 ZABW       Africa      
EDU.SLAC.STANFORD.PINGER  ZABW.ACBANKOFBOTSWANA.NWU.N1           ?r  315.727  315.882  315.738  315.672  315.758  315.877  316.134  315.879  316.063  333.509  345.746  317.119  330.161  316.179  324.060  316.010  315.978  315.854  315.866  315.804  315.837  315.713  315.724  315.842  pinger.slac.stanford.edu  EDU      .North_America  www.bankofbotswana.bw      .   BW     .  Africa      
EDU.SLAC.STANFORD.PINGER  BW.BTC.NS1      .        .    ?B  315.399  315.622  315.758  315.422  315.327  315.343  315.536  315.452  315.409  315.444  316.058  315.952  315.530  315.280  315.599  315.400  315.880  315.394        .        .        .        .        .        .        315.349  315.332  315.397  315.312  315.698  315.403  pinger.slac.stanford.edu  EDU      North_America  wwwns1.nwu.ac.zabtc.bw                    ZABW       Africa      
EDU.SLAC.STANFORD.PINGER  LS.BOS.GOV.N1               ?r  312.842  312.871  312.830  312.884  312.876  312.887  312.891  312.929  312.953  312.976  312.990  312.809  312.942  312.840  312.924  312.910  312.873  312.885  312.893  312.796  312.820  312.840  312.877  312.846  pinger.slac.stanford.edu  EDU      North_America  www.bos.gov.ls                LS       Africa      
EDU.SLAC.STANFORD.PINGER  LS.LCE.AC.WWW               ?r  313.298  313.367  313.335  313.400  313.375  313.374  313.433  313.519  313.521  313.796  313.998  313.553  313.403  313.544  313.423  313.402  313.361  313.358  313.372  313.268  313.329  313.371  313.393  313.427  pinger.slac.stanford.edu  EDU      North_America  www.lce.ac.ls                 LS       Africa      
EDU.SLAC.STANFORD.PINGER  LS.LEO.CO.N1                ?B  329.891  329.871  329.937  329.809  329.847  329.973  329.877  329.885  329.944  329.805  329.898  329.871  329.834  329.770  329.867  329.901  329.900  329.913  329.776  329.809  329.860  329.886  329.876  329.913  pinger.slac.stanford.edu  EDU      North_America  www.leo.co.ls                 LS       Africa      
EDU.SLAC.STANFORD.PINGER  LS.LNDC.ORG.WWW             ?r  .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        pinger.slac.stanford.edu  EDU      North_America  www.lndc.org.ls               LS       Africa      
EDU.SLAC.STANFORD.PINGER  NA.AGRINAMIBIA.COM.N1       ?r  316.059  316.112  315.991  316.023  316.063  315.959  324.203  324.279  324.300  316.118  316.152  315.962  316.082  315.996  316.180  316.112  316.085  316.160  316.060  316.051  316.061  316.100  316.017  316.082  pinger.slac.stanford.edu  EDU      North_America  www.agrinamibia.com.na        NA       Africa      
EDU.SLAC.STANFORD.PINGER  NA.BRAHMAN.IWAY             ?r  .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        pinger.slac.stanford.edu  EDU      North_America  www.brahman.iway.na           NA       Africa      
EDU.SLAC.STANFORD.PINGER  NA.MME.GOV.N1               ?B  316.476  316.546  316.501  316.480  316.587  316.452  324.635  324.729  316.452  316.492  316.617  316.492  316.496  316.422  316.489  316.580  316.644  316.568  316.499  316.504  316.450  316.471  316.522  316.419  pinger.slac.stanford.edu  EDU      North_America  www.mme.gov.na                NA       Africa      
EDU.SLAC.STANFORD.PINGER  SZ.ACAT.ORG.N1              ?B  325.502  304.647  304.720  304.756  304.689  304.832  326.869  344.121  351.111  350.593  350.049  340.553  328.354  337.106  330.511  325.965  325.950  326.011  329.815  329.824  330.056  329.972  330.004  329.891  pinger.slac.stanford.edu  EDU      North_America  www.acat.org.sz               SZ       Africa      
EDU.SLAC.STANFORD.PINGER  SZ.REALBROADBAND.CO         ?r  325.069  303.975  304.023  304.026  304.019  304.121  304.406  355.842  346.205  348.319  346.952  328.566  324.738  326.837  325.829  324.329  324.219  324.102  328.097  328.116  328.134  328.286  328.066  328.144  pinger.slac.stanford.edu  EDU      North_America  www.realbroadband.co.sz       SZ       Africa      
EDU.SLAC.STANFORD.PINGER  SZ.UNISWA.ORG.WWW           ?r  298.450  298.153  298.117  297.186  297.131  296.841  298.139  296.903  296.395  296.558  296.601  296.959  296.640  296.524  296.668  296.753  296.702  296.896  297.137  296.894  296.587  296.615  297.133  296.753  pinger.slac.stanford.edu  EDU      North_America  www.uniswafoundation.org.sz   SZ       Africa      
EDU.SLAC.STANFORD.PINGER  ZA.AC.NMMU.N1               ?r  303.254  303.259  303.252  303.242  303.222  303.224  303.260  303.255  303.253  303.287  303.260  303.199  303.190  303.171  303.267  303.228  303.282  303.280  303.265  303.179  303.139  303.188  303.173  303.249  pinger.slac.stanford.edu  EDU      North_America  www.nmmu.ac.za                ZA       Africa      
EDU.SLAC.STANFORD.PINGER  ZA.AC.NWU.N1                ?r  .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        .        pinger.slac.stanford.edu  EDU      North_America  www.nwu.ac.za                 ZA       Africa      
EDU.SLAC.STANFORD.PINGER  ZA.BONTANY.UWC.AC.N1        ?r  315.577  315.549  315.543  315.623  315.598  315.537  315.603  315.560  315.556  315.569  336.325  336.267  336.290  336.224  336.356  336.402  336.354  336.385  336.349  336.416  336.351  336.299  336.341  336.421  pinger.slac.stanford.edu  EDU      North_America  196.21.45.139                 ZA       Africa      
EDU.SLAC.STANFORD.PINGER  ZA.DUT.AC.N1                ?r  306.191  306.324  306.287  306.328  306.377  306.398  306.441  306.591  306.860  306.605  306.572  306.618  306.578  306.474  306.455  306.428  306.346  306.378  306.491  306.318  306.284  306.395  306.262  306.248  pinger.slac.stanford.edu  EDU      North_America  www.dut.ac.za                 ZA       Africa      
EDU.SLAC.STANFORD.PINGER  ZA.MUSEUMSNC.CO             ?r  305.339  305.407  305.384  305.513  305.397  305.504  305.418  305.434  305.378  305.498  304.907  304.774  304.900  305.073  305.491  305.404  305.437  305.478  305.808  305.546  311.584  305.420  305.553  305.436  pinger.slac.stanford.edu  EDU      North_America  www.museumsnc.co.za           ZA       Africa      
EDU.SLAC.STANFORD.PINGER  ZA.RU.AC.N1                 ?r  306.200  306.242  306.202  306.153  306.186  306.186  306.246  306.178  306.193  306.206  306.217  306.114  306.129  306.057  306.227  306.228  306.166  306.149  306.203  306.129  306.131  306.161  306.118  306.243  pinger.slac.stanford.edu  EDU      North_America  www.ru.ac.za                  ZA.BONTANY.UWC       Africa      
EDU.SLAC.STANFORD.PINGER  ZA.SAGRID.AC.N1             ?r  315294.577901  315294.549915  315294.543805  315294.623903  315294.598892  315294.537889  315294.603856  315294.560905  315294.556873  315294.569897  336306.325606  336306.267592  336306.290546  336306.224530  336306.356675  336306.402643  336306.354603  336306.385616  336306.349597  336306.416578  336306.351555  336306.299573  336306.341613  336306.421609  pinger.slac.stanford.edu  EDU      North_America  196sagrid.21.45.139ac.za                  ZA       Africa      
EDU.SLAC.STANFORD.PINGER  ZA.DUTTECHCONCEPTS.ACCO.N1       ?r  .   ?r     .        306.191.        306.324.        306.287.        306.328.        306.377  306.398  306.441  306.591  306.860  306.605  306.572  306.618  306.578  306.474  306.455  306.428  306.346  306.378  306.491  306.318  306.284  306.395  306.262  306.248  pinger.slac.stanford.edu  EDU      North_America.  www.dut.ac.za      .        .   ZA     .  Africa      
EDU.SLAC.STANFORD.PINGER  ZA.MUSEUMSNC.CO  .        .      ?r  305.339  305.407  305.384  305.513  305.397  305.504  305.418  305.434  305.378  305.498  304.907  304.774  304.900  305.073  305.491  305.404  305.437  305.478  305.808  305.546  311.584  305.420  305.553  305.436  pinger.slac.stanford.edu  EDU      North_America  wwwspeedtest.museumsnc.co.za           techconcepts.co.za  ZA       Africa      
EDU.SLAC.STANFORD.PINGER  ZA.RUTENET.AC.N1              ?rM  306280.200581  306280.242644  306280.202561  306280.153593  306280.186590  306280.186626  306280.246597  306280.178531  306280.193614  306301.206662  306301.217652  306301.114571  306301.129545  306301.057668  306301.227701  306301.228725  306301.166650  306301.149724  306301.203577  306301.129644  306301.131540  306301.161622  306301.118704  306301.243707  pinger.slac.stanford.edu  EDU      North_America  wwwbrunsvigia.rutenet.ac.za                  ZA       Africa      
EDU.SLAC.STANFORD.PINGER  ZAZW.SAGRIDACROSSAFRICATOURS.ACCO.N1N2        ?r  294.901  294.915  294.805  294.903  294.892  294.889  294.856  294.905  294.873  294.897  306.606  306.592  306.546  306.530  306.675  306.643  306.603  306.616  306.597  306.578  306.555  306.573  306.613  306.609  pinger.slac.stanford.edu  EDU.      North_America  sagrid.ac.za        .        .   ZA     .  Africa      
EDU.SLAC.STANFORD.PINGER  ZA.TECHCONCEPTS.CO.N1  ?r.        .        .        .        .        .        .        .        .        .        .        .        .        pinger.slac.stanford.edu  EDU      North_America  www.acrossafricatours.co.zw   ZW     .  Africa      
EDU.SLAC.STANFORD.PINGER  ZW.HELLENIC.AC.N1      .     ?B   309.769  309.585  309.702  309.621  309.666  309.611  309.852  309.847  309.936  309.951  309.736  309.811  310.127  309.780  309.897  309.704  309.912  309.779  309.759  309.742  309.720        . 309.514  309.610  309.729   pinger.slac.stanford.edu  EDU      North_America  speedtestwww.techconceptshellenic.co.zaac.zw            ZAZW       Africa      
EDU.SLAC.STANFORD.PINGER  ZAZW.TENETPAYNET.ACCO.N1             ?Mr  280324.581584  280324.644776  280324.561691  280325.593179  280324.590917  280324.626998  280325.597087  280325.531175  280324.614887  301325.662771  301325.652117  301325.571435  301325.545500  301324.668762  301325.701113  301325.725411  301325.650560  301325.724380  301325.577045  301324.644755  301324.540942  301325.622346  301324.704855  301325.707750  pinger.slac.stanford.edu  EDU      North_America  brunsvigiawww.tenetpaynet.ac.zaco.zw              ZAZW       Africa      
Monitoring-Site   Remote-Site   ?   0   1   2   3   4   5   6   7   8   9   10   11   12   13   14   15   16   17   18   19   20   21   22   23   Monitoring-Node   Mon-TLD  Mon-Region   Remote-Node   Rem-TLD  Rem-Region  

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Summary for Sites in S.AFRICA seen from EDU.SLAC.STANFORD.PINGER

Traceroute

The route measured 19:00 hrs 1/28/2020 PST from SLAC to South Africa goes East across the US via Chicago, Washinton to London and thence S. Africa:

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