﻿24 
  ' 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  SEISMOLOGICAL 
  STATION 
  

  

  The 
  Bosch-Omori 
  instruments 
  installed 
  in 
  the 
  State 
  Museum 
  in 
  

   j\Iarch 
  1906 
  have 
  given 
  practically 
  continuous 
  service 
  to 
  the 
  

   present 
  time. 
  Altogether 
  they 
  have 
  furnished 
  records 
  of 
  35 
  dif- 
  

   ferent 
  earthquakes, 
  of 
  which 
  nine 
  occurred 
  during 
  the 
  year 
  end- 
  

   ing 
  September 
  30, 
  1908. 
  In 
  the 
  preceding 
  year 
  which 
  seems 
  to 
  

   have 
  been 
  one 
  of 
  notable 
  seismic 
  activity, 
  there 
  were 
  recorded 
  19 
  

   shocks. 
  The 
  remaining 
  seven 
  were 
  registered 
  in 
  the 
  period 
  from 
  

   March 
  10 
  to 
  October 
  i, 
  1906. 
  

  

  The 
  records 
  obtained 
  during 
  the 
  year 
  just 
  elapsed 
  are 
  listed 
  in 
  

   the 
  accompanying 
  table. 
  When 
  additional 
  details 
  relative 
  to 
  the 
  

   individual 
  disturbances 
  have 
  been 
  available 
  they 
  are 
  appended 
  as 
  

   notes. 
  The 
  character 
  of 
  the 
  records 
  varies 
  to 
  a 
  marked 
  degree^ 
  

   depending 
  upon 
  the 
  wave 
  motion 
  set 
  up 
  by 
  each 
  shock, 
  the 
  distance 
  

   of 
  the 
  focus 
  and 
  other 
  factors 
  not 
  as 
  yet 
  well 
  understood. 
  Hence^ 
  

   it 
  is 
  not 
  always 
  possible 
  to 
  give 
  the 
  different 
  elements 
  character- 
  

   izing 
  a 
  disturbance 
  with 
  satisfactory 
  completeness, 
  though 
  in 
  many 
  

   cases, 
  specially 
  in 
  respect 
  to 
  the 
  more 
  violent 
  earthquakes, 
  the 
  

   records 
  can 
  be 
  used 
  as 
  a 
  reliable 
  basis 
  for 
  deduction. 
  

  

  So 
  far 
  the 
  instruments 
  have 
  recorded 
  no 
  .earth 
  movements 
  of 
  

   local 
  origin. 
  The 
  sources 
  of 
  the 
  disturbances 
  have 
  been 
  widely 
  

   distributed, 
  but 
  none 
  of 
  them 
  nearer 
  probably 
  than 
  2000 
  miles. 
  Irt 
  

   a 
  majority 
  of 
  instances, 
  perhaps, 
  they 
  have 
  been 
  related 
  to 
  the 
  

   series 
  of 
  readjustments 
  that 
  has 
  taken 
  place 
  recently 
  in 
  the 
  Cordil- 
  

   leran 
  region 
  of 
  North 
  and 
  South 
  America, 
  as 
  manifested 
  b}^ 
  the 
  

   extremely 
  forceful 
  earthquakes 
  of 
  San 
  Francisco, 
  Valparaiso 
  and 
  

   Central 
  Mexico 
  and 
  a 
  number 
  of 
  smaller 
  ones 
  within 
  that 
  zone. 
  

   These 
  seem 
  to 
  have 
  been 
  due 
  to 
  tectonic 
  displacements 
  or 
  fault 
  

   slips. 
  With 
  the 
  relief 
  of 
  stress 
  they 
  have 
  undoubtedly 
  ajfforded, 
  

   a 
  period 
  of 
  comparative 
  repose 
  may 
  be 
  expected 
  to 
  follow 
  and 
  to 
  

   continue 
  for 
  some 
  time. 
  The 
  nearest 
  region 
  of 
  disturbance 
  to 
  

   which 
  local 
  records 
  can 
  be 
  definitely 
  referred 
  is 
  the 
  West 
  Indies. 
  

   There 
  have 
  been 
  several 
  shocks 
  of 
  notable 
  size 
  registered 
  at 
  

   Albany 
  that 
  could 
  not 
  be 
  traced 
  to 
  any 
  known 
  occurrence 
  on 
  land 
  

   and 
  were 
  probably 
  of 
  submarine 
  origin. 
  

  

  The 
  Albany 
  station 
  has 
  communicated 
  its 
  observations 
  from 
  

   time 
  to 
  time 
  to 
  the 
  International 
  Seismological 
  Association 
  for 
  

   record 
  in 
  its 
  reports 
  and 
  to 
  the 
  California 
  Earthquake 
  Commission. 
  

   The 
  latter 
  has 
  recently 
  published 
  a 
  comprehensive 
  account 
  of 
  the 
  

   vSan 
  Francisco 
  earthquake. 
  

  

  Full 
  details 
  of 
  the 
  local 
  station 
  have 
  appeared 
  in' 
  a 
  previous 
  

   report. 
  The 
  important 
  constants 
  applicable 
  to 
  the 
  interpretation 
  

  

  