Historical clue formulations

• Ground-breaking event — 2025-02-15
• Quake — 2024-08-04
• Earth-shaking event — 2024-01-05
• Quiver — 2021-11-07
• Shake — 2021-06-12
• It shakes things up — 2018-09-24
• Sign of an earthquake — 2017-02-20
• 4.0, maybe — 2016-08-26
• Minor seismic movement — 2015-04-28
• Something a seismograph picks up — 2014-11-19
• It comes as a shock — 2014-06-15
• Shake — 2011-03-19
• 2 or 3 on the Richter scale, maybe — 2010-10-26
• Cause of a low Richter reading — 2009-01-26
• Richter scale blip — 2008-04-15
• Aftershock — 2008-03-17
• Mild aftershock — 2006-10-02
• Earthquake's onset — 2002-12-29
• It's earthshaking — 2002-12-09
• Slight quake — 2002-12-03
• Pre-eruption warning — 2002-11-29
• Aftershock — 2002-07-03
• Sign of nervousness — 2001-09-23
• Aftershock — 1999-09-17
• Shaking — 1997-08-23
• 2 or 3, maybe, on the Richter scale — 1997-08-11
• It's a fault's fault — 1997-04-20
• Reading on the Richter scale — 1996-12-22
• Shake — 1996-10-26
• California event — 1996-07-04
• Aftershock — 1993-11-25