27.7.2. Filtering

Try these first

1. 1.

   What is the main purpose of filtering in seismology?

   Hint

   Think about the words 'clean' and 'clear'.

2. 2.

   Name one type of filter used in seismology.

   Hint

   Consider what each filter does.

3. 3.

   What does a low-pass filter do?

   • Allows high frequencies
   • Allows low frequencies
   • Removes all frequencies

   Hint

   Remember its name: 'low-pass'!

4. 4.

   True or False: High-pass filters remove high-frequency noise.

   • True
   • False

   Hint

   Think about what is 'high' and what is 'low'.

5. 5.

   Given a seismogram that includes significant background noise, outline the steps you would take to filter the data effectively.

   Hint

   Consider what noise types are most disruptive.

6. 6.

   Discuss the potential risks of ignoring baseline drift when analyzing seismic data for an earthquake-prone zone.

   Hint

   Recall how misleading data can affect safety protocols.