Our Ref.: HKO 220/172/22


                                                                              12 June 2020


Sir/Madam,


                           Preliminary Seismological Analysis


      Enclosed please find the preliminary seismological analysis from January to
March 2020 for the station HKPS. Please note that Broadband records include all 3
components.




                                                          Yours faithfully,




                                                           ( Mr. T.W. Hui )
                                             for Director of the Hong Kong Observatory
      Preliminary Analysis of the Seismograph at HKPS for Jan 2020

  Date       phase   Component    Time (UTC)    Δ*        Remarks
                                   HHMMSS
Year 2020
 1 - Jan      Nil
 2 - Jan      Nil
 3 - Jan      Nil
 4 - Jan      P        ENZ          225544              Compr to NE
 5 - Jan      Nil
 6 - Jan      Nil
 7 - Jan      P        ENZ          061054              Compr to NE
              P        ENZ          191945              Compr to SE
 8 - Jan      Nil
 9 - Jan      Nil
 10 - Jan     Nil
 11 - Jan     Nil
 12 - Jan     Nil
 13 - Jan     Nil
 14 - Jan     Nil
 15 - Jan     Nil
 16 - Jan     Nil
 17 - Jan     Nil
 18 - Jan     P        ENZ          164503              Compr to NW
 19 - Jan     P        ENZ          170325              Compr to NW
 20 - Jan     Nil
 21 - Jan     Nil
 22 - Jan     Nil
 23 - Jan     P        ENZ          060309              Compr to SW
 24 - Jan     Nil
 25 - Jan     Nil
 26 - Jan     Nil
 27 - Jan     Nil
 28 - Jan     Nil
 29 - Jan     P        ENZ          235213              Compr to SE
 30 - Jan     Nil
 31 - Jan     Nil
     Preliminary Analysis of the Seismograph at HKPS for Feb 2020

  Date      phase   Component    Time (UTC)    Δ*        Remarks
                                  HHMMSS
Year 2020
  1 - Feb    Nil
  2 - Feb    Nil
  3 - Feb    Nil
  4 - Feb    Nil
  5 - Feb    Nil
  6 - Feb    Nil
  7 - Feb    Nil
  8 - Feb    Nil
  9 - Feb    P        ENZ          061254              Compr to NW
 10 - Feb    Nil
 11 - Feb    Nil
 12 - Feb    Nil
 13 - Feb    P        ENZ          104038              Compr to SW
 14 - Feb    Nil
 15 - Feb    Nil
 16 - Feb    Nil
 17 - Feb    Nil
 18 - Feb    Nil
 19 - Feb    Nil
 20 - Feb    Nil
 21 - Feb    Nil
 22 - Feb    Nil
 23 - Feb    Nil
 24 - Feb    Nil
 25 - Feb    Nil
 26 - Feb    P        ENZ          073951              Compr to SE
 27 - Feb    Nil
 28 - Feb    Nil
 29 - Feb    Nil
     Preliminary Analysis of the Seismograph at HKPS for Mar 2020

  Date      phase   Component    Time (UTC)    Δ*        Remarks
                                  HHMMSS
Year 2020
  1 - Mar    Nil
  2 - Mar    Nil
  3 - Mar    Nil
  4 - Mar    Nil
  5 - Mar    Nil
  6 - Mar    Nil
  7 - Mar    Nil
  8 - Mar    Nil
  9 - Mar    Nil
 10 - Mar    Nil
 11 - Mar    Nil
 12 - Mar    Nil
 13 - Mar    Nil
 14 - Mar    P         ENZ         101349              Compr to SE
 15 - Mar    Nil
 16 - Mar    Nil
 17 - Mar    Nil
 18 - Mar    P         NZ          175216              Compr to S
             P          Z          032352              Compr
 19 - Mar    Nil
 20 - Mar    P          Z          030915              dilat
 21 - Mar    Nil
 22 - Mar    Nil
 23 - Mar    Nil
 24 - Mar    Nil
 25 - Mar    P         ENZ         025718              Compr to SW
 26 - Mar    Nil
 27 - Mar    Nil
 28 - Mar    Nil
 29 - Mar    Nil
 30 - Mar    Nil
 31 - Mar    Nil