40 Facts About California Earthquake December 2024

Recent Earthquake Activity in California

California's seismic activity has been a topic of concern, especially with the recent uptick in earthquakes. Understanding the patterns and impacts can help residents prepare better.

1. Southern California has felt 15 independent seismic sequences this year, with at least one magnitude 4 or higher earthquake, marking the highest annual total in the last 65 years.
2. There has been an increase in moderate earthquakes in the region, with some scientists noting that this could be due to various factors, including changes in tectonic activity or other geological processes.
3. Despite the increased frequency of moderate earthquakes, California remains in a 'seismic drought' with no major damaging earthquakes under the Golden State's most populous cities in the last 30 years.

Historical Earthquakes and Their Impact

California has a long history of significant earthquakes that have shaped its approach to preparedness and mitigation.

4. The 6.7 magnitude Northridge earthquake in 1994 caused significant damage and loss of life, highlighting the importance of earthquake preparedness and mitigation measures.
5. The 7.9 magnitude Fort Tejon earthquake in 1857 is one of the largest recorded earthquakes in California's history, emphasizing the long history of seismic activity in the region.
6. A hypothetical future magnitude 7.8 earthquake on the southern San Andreas fault could result in 1,800 deaths and nearly 50,000 injuries, according to the U.S. Geological Survey's 'ShakeOut' scenario.

Earthquake Preparedness Measures

Being prepared for an earthquake can make a significant difference in safety and recovery. Here are some steps residents can take.

7. The City of Berkeley emphasizes the importance of preparing an emergency plan for pets, making a disaster kit with enough food and water for at least 7 days, and securing items that could fall and cause injuries.
8. The MyShake app, available on Apple App and Google Play stores, provides information about the State of California's Earthquake Early Warning System, helping residents prepare for potential earthquakes.
9. A disaster kit should include essential items such as food, water, first aid supplies, and important documents like birth certificates and insurance forms.
10. Making a disaster plan with your household, including a meeting spot and emergency contact numbers, is crucial for quick response during an earthquake.
11. Teaching everyone in your household the "Drop, Cover, and Hold On!" technique and practicing it together is essential for survival during an earthquake.
12. Considering purchasing earthquake insurance coverage can provide financial protection against potential damages.

Seismic Retrofitting and Financial Assistance

Retrofitting homes can significantly reduce damage during an earthquake. Financial assistance programs are available to help with these costs.

13. The California Residential Mitigation Program (CRMP) offers up to $3000 for homeowners to cover costs associated with earthquake retrofitting, which involves bolting the house to its foundation and adding bracing around the perimeter of the crawl space.
14. Homeowners are encouraged to use licensed contractors experienced in seismic retrofitting to ensure the work is done correctly.

Government and Community Efforts

Government agencies and community organizations play a crucial role in earthquake preparedness and response.

15. The California Governor’s Office of Emergency Services (Cal OES) issues advisories after notification from the California Earthquake Prediction Evaluation Center (CEPEC) regarding significant public safety considerations.
16. Cal OES notifies affected county emergency managers and distributes advisories to educate the public about potential earthquake risks.
17. The Great ShakeOut Earthquake Drill is an annual event aimed at educating the public on earthquake preparedness and response.
18. The California Governor’s Office of Emergency Services continuously researches and develops new ways to improve the safety of California’s residents and visitors before disaster strikes.
19. Through planning and improving building codes, transportation, communications, and education, the state works to decrease the loss of life and protect property during earthquakes.

Recent Earthquake Events and Their Effects

Recent earthquakes have shown the potential impacts on infrastructure and communities.

20. Earthquakes can cause significant disruptions to electricity and water lifelines, as well as structural damage to buildings, as seen in the recent M7.0 offshore Cape Mendocino earthquake.
21. The National Tsunami Warning Center issued a tsunami warning for coastal areas from Davenport, California to the border of Douglas and Line counties in Oregon following the M7.0 earthquake, but the warning was canceled less than an hour later.
22. The M7.0 earthquake caused non-structural impacts in Humboldt County, including disruption to electricity and water lifelines.
23. Some structural damage was reported in the Eel River Valley area following the M7.0 earthquake.
24. As of the latest reports, no casualties have been reported from the M7.0 earthquake.

Research and Monitoring Efforts

Ongoing research and monitoring are essential for understanding and predicting earthquakes.

25. The Earthquake Engineering Research Institute (EERI) is monitoring the situation via media reports and updates from partner agencies and colleagues in the affected region.
26. EERI has established a virtual clearinghouse website for collecting reconnaissance data and other resources related to the earthquake.
27. Seismologists have spent decades trying to read the tea leaves to look for patterns in seismic activity before major earthquakes, but no statistically meaningful patterns have been found.
28. The recent Eastside L.A earthquakes were centered on faults associated with the Puente Hills thrust fault system, which is underneath downtown L.A. and swaths of southeast L.A County, the San Gabriel Valley, and northern Orange County.
29. The Puente Hills thrust fault system is one of several active fault systems in Southern California that pose significant earthquake risks to the region.
30. The seismic network in Southern California was installed 100 years ago to monitor small earthquakes and potentially predict larger ones, but this approach has not yielded consistent results.
31. Seismologist Susan Hough noted that earthquakes pop off around the state like popcorn, sometimes bunching up for reasons that are not fully understood.
32. Seismologist Lucy Jones observed that Southern California has experienced 15 independent seismic sequences this year, with at least one magnitude 4 or higher earthquake, surpassing the 13 seen in 1988.

Practical Steps for Earthquake Preparedness

Practical steps can help individuals and communities be better prepared for earthquakes.

33. The Los Angeles Times has published a handy guide on all things earthquake preparedness, including practical steps individuals can take to prepare for earthquakes.
34. Keeping a pack of personal supplies, including walking shoes, is essential for quick evacuation during an earthquake.
35. Knowing evacuation routes and locations deemed safe is crucial for emergency response during an earthquake.
36. Developing plans for shelters and emergency shelters is part of comprehensive earthquake preparedness.
37. Effective communication is vital during an earthquake, including early warning systems and emergency alerts.
38. The State of California’s Earthquake Early Warning System, such as the MyShake app, provides critical seconds of warning before the ground starts shaking.
39. Earthquake preparedness is not just an individual responsibility but also a community effort, involving local governments, schools, and businesses.
40. The California Governor’s Office of Emergency Services and other agencies continue to research and develop new strategies to improve earthquake preparedness and response, ensuring that the state remains resilient in the face of seismic activity.

Staying Prepared for Future Quakes

California's earthquake activity in December 2024 serves as a stark reminder of the state's seismic reality. With 15 independent seismic sequences this year, including several magnitude 4 or higher quakes, it's clear that the ground beneath us is restless. Despite the absence of major damaging earthquakes in recent decades, the potential for a catastrophic event remains high.

Residents should focus on earthquake preparedness by creating emergency plans, assembling disaster kits, and securing their homes. Tools like the MyShake app and programs like the California Residential Mitigation Program offer valuable resources.

Understanding the importance of seismic retrofitting and having earthquake insurance can also provide peace of mind. By staying informed and prepared, Californians can mitigate the impact of future earthquakes and ensure their safety. Remember, it's not a matter of if, but when the next big quake will strike.