2019 Ridgecrest Earthquake Sequence: An Independence Day California Won't Forget

On July 4, 2019, a magnitude 6.4 earthquake struck near Ridgecrest, a town in California's Mojave Desert. Thirty-four hours later, a magnitude 7.1 earthquake hit the same area – the largest to strike California in 20 years. Shaking was felt across California, Arizona, and Nevada. The earthquakes killed one person, injured 25, and caused surface ruptures stretching 30 miles with ground displacement exceeding six feet. Total damage exceeded $5.3 billion. Learn about the impact of the Ridgecrest earthquakes and how they became a case study for understanding earthquake cascades and stress transfer between intersecting fault systems. We'll also share an important message about safety and preparedness. ⏱️ Timestamps INTRODUCTION 00:00 – Welcome Message 00:12 – Topic Introduction 2019 EARTHQUAKE FACTS 00:30 – About Ridgecrest 01:01 – The Earthquake Sequence 01:41 – One Death and 25 Injuries 02:03 – Damage and Economic Impact 02:35 – Surface Rupture SCIENTIFIC LESSONS 03:05 – Two Perpendicular Fault Systems 03:24 – L-Shaped Rupture Pattern 03:51 – Aftershocks 04:10 – Rethinking Seismic Hazards OUR EXPERIENCE 04:31 – Did We Feel It? 05:34 – QuakeFeed Emails 06:01 – Reaffirming our "Why" 06:24 – Preparedness Call to Action CLOSING 06:45 – Closing Message 07:10 – Drop, Cover, Hold On Instructions 📚 Learn More 🔗 QuakeFeed Substack: 2019 Ridgecrest Earthquake Sequence https://quakefeed.substack.com/p/2019-ridgecrest-earthquake-sequence 🎙️ QuakeFeed Podcast: Drop, Cover, and Hold On https://podcasts.apple.com/us/podcast/drop-cover-hold-on/id1562704664?i=1000520234015 🔗 CALFIRE: Fireworks Safety https://readyforwildfire.org/prevent-wildfire/fireworks-safety/ 📱 Download QuakeFeed for Real-Time Alerts Stay informed – get the QuakeFeed app now: https://apps.apple.com/app/quakefeed-earthquake-alerts/id403037266 Want to view the 2019 Ridgecrest Earthquake Sequence on an interactive map that shows the epicenter, shaking intensity, and faults? Subscribe to QuakeFeed Premium for the full range of features – including Historical Earthquakes. It's free for 30-days for first-time subscribers. 🌍 Connect with Us Substack: https://quakefeed.substack.com YouTube: https://youtube.com/@QuakeFeed Instagram: https://instagram.com/QuakeFeed Twitter/X: https://twitter.com/QuakeFeed 🙌 Support the Show If you found this episode helpful, please rate, review, and share it. Your support helps others stay informed and prepared. 🎵 Music By Soularflair Bio on FMA: https://freemusicarchive.org/music/Soularflair/bio CC-BY License: https://creativecommons.org/licenses/by/4.0/

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