Related Clues:

• Getting through a half century is massive
• Knight wanting nice miss, bust of enormous proportions
• Hugely important moment involving regular characters in oil summit
• Earth-shattering, maybe
• Some of the course is microanalysis of earthquakes
• Is coming in half cut, initially, showing quakiness
• Related to earthquakes
• Earth-shattering noise - is microphone covered?
• Earth-shattering?
• Huge proportion of universe is microscopic
• Like great shakes
• Dramatic deep breaths heard over microphone
• Related to big vibrations
• Huge and abrupt
• Shaky's half-seen with one's microphone