The variable $stn is the current hash you are building up. When you encounter a /^H/ or /^reclin/ or the end of input, you want to save that hash to your array and reset it: 
my $stn; # current stn hash being constructed
...
while (<IN>) {
  if (/^H/ || /^reclin/i) {
    if ($stn) {
      ...save $stn...;
      $stn = undef; # reset stn hash
    }
  }

  if (/^H/ ... /[<\[]/) { ... same code ... }
  next if (/^reclin/i);

  ... parse new $stn hash values ...
  $stn->{$s} = [ $x, $y, $z ];
}
if ($stn) {
  ...save $stn...
}

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In reply to Re: Matching next line in text file by pc88mxer
in thread Matching next line in text file by YYCseismic

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