PSN-
    Just for drill, I put together all the PSN records (all records
displayed have been decimated to 0.5 sps or less) of the 4 June M7.8
Sumatra Earthquake

http://wwwneic.cr.usgs.gov/neis/bulletin/00_EVENTS/000604162825/000604162825.HTML

on one pseudo-recordsection; see

    ftp://groundmotion.cr.usgs.gov/PSN/event/Sumatra/

PLOT0001.GIF
PLOT0002.GIF    Low-passed at 0.1 Hz
PLOT0003.GIF    Low-passed at 0.01 Hz
PLOT0004.GIF    Low-passed at 0.02 Hz

    I then did some plots of Meredith's 3-component (vector) records of
this event (all three components have been decimated to 0.5555 sps and
are plotted at the same amplitude scale):

PLOT0005.GIF
PLOT0006.GIF    Low-passed at 0.01 Hz
PLOT0007.GIF    Jump first 200 s, plot next 1000 s, low-passed at 0.1 Hz

PLOT0008.GIF    Jump first 200 s, plot next 1000 s, low-passed at 0.05
Hz
PLOT0009.GIF    Jump first 200 s, plot next ~10000 s, low-passed at 0.08
Hz
PLOT0010.GIF    Jump first 200 s, plot next ~10000 s, low-passed at 0.04
Hz
PLOT0011.GIF    Jump first 200 s, plot next ~10000 s, low-passed at 0.02
Hz
PLOT0012.GIF    Jump first 200 s, plot next ~10000 s, low-passed at 0.01
Hz

Note the differences in amplitudes between the three components for
different phases, different frequency bands.

--
Edward Cranswick                Tel: 303-273-8609
US Geological Survey, MS 966    Fax: 303-273-8600
PO Box 25046, Federal Center    cranswick@........
Denver, CO 80225-0046  USA      E.M. Forster said, "Only connect".


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