﻿MOTION 
  OF 
  WAVE 
  PARTICLE 
  8 
  1 
  

  

  The 
  way 
  in 
  which 
  forest 
  trees 
  have 
  been 
  snapped 
  across 
  in 
  the 
  

   neighbourhood 
  of 
  these 
  faults, 
  as 
  described 
  in 
  Chapter 
  IX, 
  shows 
  that 
  

   the 
  violence 
  of 
  the 
  shock 
  must 
  have 
  been 
  very 
  great, 
  probably 
  four 
  

   or 
  five 
  times 
  as 
  great 
  as 
  at 
  Shillong 
  or 
  Gauhati. 
  If 
  we 
  assume 
  that 
  

   it 
  was 
  only 
  twice 
  as 
  great, 
  or 
  the 
  acceleration 
  at 
  least 
  64 
  feet 
  

   per 
  sec, 
  it 
  would 
  be 
  equivalent 
  to 
  the 
  shock 
  of 
  sudden 
  arrest 
  after 
  

   a 
  fall 
  of 
  64 
  feet; 
  if 
  three 
  times, 
  then 
  the 
  corresponding 
  fall 
  would 
  be 
  

   144 
  feet, 
  and 
  so 
  on, 
  and 
  as 
  the 
  men 
  must 
  have 
  been 
  close 
  to 
  the 
  line 
  

   of 
  fault, 
  where 
  the 
  focus 
  came 
  up 
  to 
  the 
  surface, 
  it 
  is 
  difficult 
  to 
  put 
  

   a 
  limit 
  to 
  the 
  possible 
  violence 
  of 
  the 
  shock. 
  

  

  This, 
  however, 
  is 
  conjecture, 
  incapable 
  of 
  support 
  by 
  numeri- 
  

   cal 
  estimates 
  or 
  calculation. 
  All 
  that 
  can 
  be 
  regarded 
  ascertain 
  is 
  

   that 
  violent 
  and 
  destructive 
  as 
  the 
  shock 
  was 
  at 
  such 
  places 
  as 
  

   Shillong, 
  Gauhati, 
  Goalpara, 
  it 
  was 
  still 
  more 
  violent 
  at 
  other 
  places 
  

   w 
  ithin 
  the 
  epicentral 
  tract, 
  where 
  fortunately 
  there 
  were 
  no 
  towns 
  

   or 
  populous 
  settlements 
  to 
  feel 
  the 
  full 
  power 
  of 
  the 
  earthquake 
  to 
  

   destroy. 
  

  

  For 
  the 
  maximum 
  velocity 
  of 
  movement, 
  1 
  propose 
  to 
  take 
  only 
  

   the 
  values 
  obtained 
  from 
  bodies 
  projected 
  by 
  the 
  shock. 
  These 
  give 
  

   for— 
  

  

  Goalpara 
  

  

  . 
  

  

  • 
  

  

  3»3oo 
  

  

  mm. 
  

  

  or 
  

  

  11 
  ft. 
  per 
  sec. 
  

  

  Gauhati 
  

  

  . 
  

  

  . 
  

  

  2,400 
  

  

  „ 
  

  

  )> 
  

  

  8 
  »s 
  11 
  », 
  

  

  Rembrai 
  

  

  . 
  

  

  ■ 
  

  

  4,200 
  

  

  M 
  

  

  1* 
  

  

  '4 
  ,. 
  „ 
  » 
  

  

  Silchar 
  . 
  

  

  . 
  

  

  • 
  

  

  450 
  

  

  H 
  

  

  11 
  

  

  »'5 
  » 
  » 
  » 
  

  

  These 
  figures 
  do 
  not 
  come 
  near 
  those 
  of 
  some 
  other 
  earthquakes. 
  

   For 
  instance, 
  if 
  Von 
  Humboldt's 
  statements 
  are 
  accepted, 
  the 
  maximum 
  

   velocity 
  of 
  movement 
  of 
  the 
  wave 
  particle 
  must 
  have 
  been 
  80 
  feet 
  

   per 
  sec. 
  in 
  the 
  Riobamba 
  earthquake 
  of 
  4th 
  February 
  1797,' 
  as 
  

   against 
  14 
  feet 
  per 
  sec, 
  the 
  highest 
  recorded 
  here. 
  

  

  Seeing 
  that 
  the 
  maximum 
  velocity, 
  maximum 
  acceleration, 
  

  

  1 
  R. 
  Mallet, 
  Neapolitan 
  Earthquake 
  of 
  1857, 
  Vol 
  II, 
  p 
  340. 
  

  

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  81 
  ) 
  

  

  