﻿Tol. 
  53.] 
  THE 
  PEMBKOKE 
  EARTHQUAKES 
  OF 
  1 
  892 
  & 
  1 
  893. 
  157 
  

  

  12. 
  On 
  the 
  Pembroke 
  Earthquakes 
  of 
  August, 
  1892, 
  and 
  November, 
  

   1893. 
  By 
  Charles 
  Davison, 
  Sc.D., 
  E.G.S., 
  King 
  Edward's 
  

   High 
  School, 
  Birmingham. 
  (Read 
  January 
  6th, 
  1897.) 
  

  

  [Plate 
  XL] 
  

  

  Contents. 
  

  

  Page 
  

  

  I. 
  Earthquakes 
  of 
  August 
  17th-23rd, 
  1892 
  159 
  

  

  II. 
  Earthquakes 
  of 
  November 
  2nd-3rd, 
  1893 
  168 
  

  

  III. 
  Origin 
  of 
  the 
  Earthquakes 
  172 
  

  

  The 
  Essex 
  earthquake, 
  one 
  of 
  the 
  strongest 
  ever 
  recorded 
  in 
  this 
  

   country, 
  occurred 
  on 
  April 
  22nd, 
  1884. 
  Since 
  that 
  time 
  the 
  most 
  

   important 
  shocks 
  are 
  those 
  which 
  were 
  felt, 
  principally 
  in 
  Pem- 
  

   brokeshire 
  and 
  the 
  surrounding 
  counties, 
  on 
  August 
  18th, 
  1892, 
  

   and 
  November 
  2nd, 
  18 
  93. 
  1 
  I 
  propose 
  in 
  this 
  paper 
  to 
  give 
  a 
  brief 
  

   account 
  of 
  the 
  nature 
  and 
  probable 
  origin 
  of 
  these 
  earthquakes, 
  a3 
  

   well 
  as 
  of 
  the 
  slighter 
  shocks 
  which 
  preceded 
  and 
  followed 
  them. 
  

   Owing 
  to 
  the 
  large 
  number 
  of 
  observations 
  (nearly 
  2000) 
  which 
  I 
  

   have 
  collected, 
  it 
  is 
  impossible 
  for 
  me 
  to 
  quote 
  the 
  authority 
  for 
  

   every 
  statement 
  here 
  made, 
  or 
  to 
  present 
  the 
  evidence 
  in 
  any 
  detail. 
  

   But, 
  in 
  offering 
  my 
  hearty 
  thanks 
  collectively 
  to 
  the 
  numerous 
  

   ladies 
  and 
  gentlemen 
  who 
  by 
  their 
  kindness 
  have 
  made 
  this 
  investi- 
  

   gation 
  possible, 
  I 
  should 
  like 
  to 
  mention 
  how 
  greatly 
  I 
  am 
  indebted 
  

   to 
  Prof. 
  Lapworfch 
  for 
  frequent 
  advice 
  and 
  assistance 
  ; 
  to 
  Mr. 
  Marr 
  

   and 
  Mr. 
  Teall 
  for 
  information 
  with 
  regard 
  to 
  the 
  geology 
  of 
  the 
  

   epicentral 
  district; 
  and 
  to 
  Mr. 
  T. 
  Mann 
  Jones, 
  F.G.S., 
  Mr. 
  H. 
  Cecil 
  

   Moore, 
  Mr. 
  Harold 
  J. 
  E. 
  Peake, 
  Mr. 
  0. 
  M. 
  Prouse, 
  F.G.S., 
  Mr. 
  G. 
  

   J. 
  Symons, 
  F.R.S., 
  and 
  especially 
  to 
  the 
  Rev. 
  "W". 
  M. 
  Morris, 
  formerly 
  

   of 
  Cresswell 
  Quay, 
  near 
  Pembroke, 
  for 
  valued 
  aid 
  in 
  collecting 
  

   additional 
  records. 
  2 
  My 
  obligations 
  to 
  the 
  last-named 
  gentleman 
  will 
  

   be 
  obvious 
  when 
  I 
  state 
  that 
  he 
  visited 
  for 
  this 
  purpose 
  nearly 
  

   all 
  parts 
  of 
  Pembrokeshire, 
  and 
  by 
  his 
  skill 
  in 
  cross-examining 
  

   observers 
  extracted 
  details 
  which 
  could 
  not 
  have 
  been 
  obtained 
  by 
  

   any 
  set 
  of 
  printed 
  questions, 
  however 
  carefully 
  framed. 
  3 
  

  

  1 
  [It 
  should 
  be 
  mentioned 
  that 
  the 
  above 
  sentence 
  was 
  written 
  before 
  the 
  

   occurrence 
  of 
  the 
  Hereford 
  earthquake 
  of 
  Dec. 
  17th, 
  1896. 
  — 
  March 
  1st, 
  1897.] 
  

  

  2 
  My 
  best 
  thanks 
  are 
  also 
  due 
  to 
  the 
  editors 
  of 
  the 
  ' 
  Times,' 
  the 
  ' 
  Standard,' 
  

   the 
  ' 
  South 
  Wales 
  Daily 
  News 
  ' 
  (Cardiff), 
  the 
  ' 
  Western 
  Morning 
  News 
  ' 
  

   (Plymouth), 
  and 
  many 
  other 
  newspapers, 
  for 
  their 
  courtesy 
  in 
  inserting 
  letters 
  

   from 
  me 
  asking 
  for 
  observations 
  of 
  the 
  earthquakes. 
  

  

  3 
  The 
  expenses 
  incurred 
  in 
  investigating 
  the 
  earthquakes 
  of 
  1893 
  were 
  

   defrayed 
  by 
  a 
  grant 
  which 
  T 
  ^<vl 
  the 
  honour 
  of 
  receiving 
  from 
  the 
  Government 
  

   Research 
  Fund. 
  

  

  