Deep Dives:  Current News and Events

California Earthquake: A Looming Threat Amidst an Unusual Calm


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This episode underscores the critical need for continued vigilance, preparedness, and proactive measures to mitigate the risks associated with a significant earthquake in California. The historical record and scientific consensus are clear: It is not a matter of "if" but "when" the next major earthquake will strike.
Timeline of Events:


1906: A magnitude 7.9 earthquake strikes the San Andreas Fault, devastating San Francisco.

1933: The magnitude 6.4 Long Beach earthquake occurs, prompting initial changes in building codes.

1964-1994: California experiences a period of significant seismic activity with 28 earthquakes of magnitude 6 or greater.

1971: The magnitude 6.6 Sylmar earthquake hits the San Fernando Valley, causing 64 deaths.

1987: The magnitude 5.9 Whittier Narrows earthquake causes localized damage and eight deaths.

1989: The magnitude 6.9 Loma Prieta earthquake, centered in the Santa Cruz Mountains, leads to collapses in San Francisco and Oakland and results in 63 deaths.

1994: The magnitude 6.7 Northridge earthquake strikes the San Fernando Valley, resulting in about 60 deaths and becoming the costliest seismic disaster in U.S. history.

Post-1994: California enters an earthquake "drought" with no major earthquakes directly impacting its most populous cities.

2005: USGS and the Southern California Earthquake Center release a scenario predicting a potential magnitude 7.5 earthquake on the Puente Hills thrust fault system that could have devastating consequences for Los Angeles and surrounding areas.

2010s-Present: Cities across California implement seismic safety measures, including retrofitting programs for vulnerable buildings, spurred by the events of the 80s and 90s.

2019: The Ridgecrest earthquake highlights the persistence of aftershocks and the challenges they pose for earthquake detection systems.

2024: Southern California experiences an unprecedented number of modest earthquakes, raising concerns about a potential larger event while highlighting advancements in earthquake detection and information dissemination.



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Deep Dives:  Current News and EventsBy Steven Baker