MATLAB: Quickly finding maximum value of a large (~8,000,000) vector

MATLABmax abs large matrices

I was trying to see if I could speed up one of my functions so I ran it through profiler. The script loads big files and writes out smaller portions of the data for me to use later. Before writing however, I check to see if the data has any abnormally large values and if it does, I skip it. After looking at the profiler output, I saw that checking to see if there are any abnormally large values is what takes the most time by far (for 70 files, about 450 seconds out of 550 seconds). I never would have thought would have been the slowest part of the code so I'm wondering if I'm missing something that I could easily do to speed it up.
So here's the abridged version of the code:
for i = 1:nFiles % loop over files
  Data = load_data(file(i)); % data is a structure with metadata and the actual
                             % data is in Data.trace which is 8640001x10x3
   for s = 1:10 % loop over stations
      badStation = 0;
      for c = 1:3 % loop over components
         % if one component is bad, skip the station
         if max(abs(Data.trace(:,s,c))) > badThreshold
            badStation = 1;
            break;
         end
      end
      if ~badStation
         for c = 1:3 % write loop
            write_data(Data.trace(:,s,c);
         end
      end
   end
end
I've checked that memory isn't an issue as there's still 9 GB free during run time. Anything simple I can do to improve this?
Thanks in advance.
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