
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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