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What duration should I use for recording my blasts? |
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If you want to record both ground vibration and acoustic overpressure on the
same record, the ISEE Seismograph User Guidelines state the following: |
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Set the record time for 2 seconds longer than the blast duration plus 1 second
for each 1100 feet (335 meters) from the blast. |
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In some cases the duration needed may exceed the maximum allowed by the
seismograph for the sample rate. If this happens the only solution is to
reduce the sample rate until the required duration can be obtained.
However, before doing this, ensure that the sample rate will be high enough for
the expected frequencies. |