Modifiers matching vibration:

• mechanical,
• seismic,
• key,
• small,
• severe,

Simple categories matching seismic:

• event,
• structure,
• attribute,
• variable,
• pitfall,
• hazard,
• wave,
• artefact,
• source,
• indicator,
• activity,
• signal,
• vibration,
• service,
• phenomenon,
• survey,
• region,
• country,
• disturbance,
• property,
• occurrence,
• measurement,
• characteristic,