Historical clue formulations

• It'll rock your world — 2024-09-27
• Cause of a Richter scale blip — 2024-09-10
• Not-so-good vibration? — 2024-06-02
• Something possibly triggered during a mass extinction event — 2023-12-27
• Quake — 2023-09-02
• Great shakes? — 2019-06-26
• Big shake — 2018-05-17
• Tsunami cause — 2017-05-10
• It's measured by the Richter scale — 2017-04-19
• Earthquake — 2015-01-07
• Earth-shaking event — 2012-11-16
• Quake — 2011-06-22
• Richter scale event — 2010-06-02
• Great shakes? — 2010-03-02
• Earthquake — 2008-11-16
• Tremor — 2006-12-24
• Big shakeup? — 2006-11-10
• Earthquake — 1998-09-15
• Bad vibration? — 1998-03-06
• Quake — 1998-02-15
• Earthshaking event — 1996-12-15
• Earthquake — 1996-12-06