鳴動

1. Origins, structure, and basic meaning

• Structure: 鳴動 (めいどう) denotes a deep reverberation or rumbling and forms the verb 鳴動する.
• Basic usage: 山全体が鳴動した reports a completed rumble; 機械が鳴動している presents a low vibration continuing now.

2. Common pitfalls and similar expressions

• Completed rumble and ongoing reverberation
  • した packages the sound as an event, while している focuses on the continuing vibration and noise.