

UCB(5Q)           Misc. Reference Manual Pages            UCB(5Q)


NAME
     UCB, ucb - description of UC Berkeley Seismological  Labora-
     tory data at the NCEDC

DESCRIPTION
     The Data Center stores the following  types  of  data  which
     were recorded by the UC Berkeley Seismological Laboratory:

     1.   catalog listings from 1910 to the present.

     2.   phase listings from 1984 to the present.

     3.   3-component digital broadband  seismograms,  consisting
          of  continuously  recorded  channels and event channels
          for local, regional and teleseismic events.  Data  from
          September 1991 to the present are currently available.


     Catalog and Phase Data

     The catalog data consists of event summary information  from
     1910 to the present, and phase, amplitude, and scalar moment
     data from 1984 to the present.

     The format for the  catalog  data  is  described  in  manual
     pages, _u_c_b._c_a_t_a_l_o_g and _u_c_b._p_h_a_s_e.  The location of the cata-
     log and phase data is described in manual page _i_n_f_o.

     Program _e_q_s_e_l_e_c_t allows the user to select a subset  of  the
     catalog  satisfying  user defined criteria.  Program _e_x_t_r_a_c_t
     extracts the event summary, comment,  phase,  and  amplitude
     information  for  selected  events from the online UCB phase
     files.


     Digital Seismograms

     The broadband digital seismograms were recorded with  either
     a  Quanterra  24-bit digitizer and data logger or with a 16-
     bit BDSN digitizing system.

     Retrieval of the digital seismograms is performed using pro-
     grams  _s_d_a_t_a,  which  creates  full  SEED volumes, or _q_d_a_t_a,
     which retrieves just the native  SEED  data  records.   Most
     external  users  should  create full SEED volumes which will
     allow data convertion to other useful formats with  the  use
     of the rdseed program from IRIS.

     NOTE: When using ftp to transfer  the  data  files  to  your
     local computer, use the binary option.


SunOS 5.5.1         Last change: 20 July 1993                   1


UCB(5Q)           Misc. Reference Manual Pages            UCB(5Q)


     For more information, contact:

          Douglas      Neuhauser,       doug@seismo.berkeley.edu,
          510-642-0931

AUTHOR
     Douglas Neuhauser,  UC  Berkeley  Seismological  Laboratory,
     California


SunOS 5.5.1         Last change: 20 July 1993                   2