A preliminary 3.5-magnitude earthquake struck about 19 miles southwest of Dana Point, Orange County, at 1:22 p.m. PDT on Monday, October 5, 2026, according to the U.S. Geological Survey. Shaking was felt throughout southern Orange County.
A 2.8-magnitude aftershock was recorded at 1:23 p.m. No immediate reports of damage or injuries have been published.
Quick Summary: What Happened Today
The event is being tracked as earthquake california activity off the Southern California coast. USGS lists the quake as preliminary.
Core facts at a glance
| Parameter | Value |
|---|---|
| Magnitude | 3.5 preliminary |
| Time | 1:22 p.m. PDT Monday October 5 2026 |
| Epicenter | ~19 miles southwest of Dana Point, Orange County |
| Depth | 7 miles |
| Aftershock | 2.8 magnitude at 1:23 p.m. |
| Damage reports | None immediate |
3 Earthquakes Rattle OC Coast – Swarm Overview
Patch reported a swarm of three earthquakes rattled the Orange County coast Monday afternoon. The swarm was widely felt in Orange and San Diego counties.
The Dana Point mainshock and aftershock sequence
The 3.5 magnitude event is the mainshock. USGS logged a 2.8 magnitude aftershock one minute later. A third event is referenced in local coverage.
Patch report: swarm widely felt in Orange and San Diego counties Monday afternoon
Patch staff posted the swarm report on Monday, October 5, 2026 at 8:26 p.m. The report notes broad felt reports across coastal communities.
Map of shaking intensity and felt reports
USGS ShakeMap and Did You Feel It data are being updated. Felt reports cluster in southern Orange County and extend south.
Where Shaking Was Felt
Shaking was reported in Dana Point, Laguna Niguel, Laguna Beach, San Clemente and Newport Beach.
Southern Orange County impact: Dana Point, Laguna Niguel, Laguna Beach, San Clemente, Newport Beach
Residents in these cities reported shaking at 1:22 p.m. PDT. No structural reports have been confirmed.
Felt reports extending into San Diego County
Patch coverage indicates felt reports reached San Diego County. The extent is consistent with a shallow offshore event.
Damage, Disruptions and Official Response
ABC7 Los Angeles reported no immediate damage or injuries. USGS issued a preliminary magnitude and location.
USGS and local agency statements
USGS lists the event as preliminary. Local agencies have not issued damage assessments as of publication.
Power, roads and infrastructure check
No outages or road closures have been reported. Monitoring continues.
Emergency services update
No emergency service calls for injuries have been confirmed.
Is This the Big One? Context for California Residents
A 3.5 magnitude earthquake is minor on the moment magnitude scale. It does not indicate rupture on a major fault.
3.5 magnitude vs major fault risk
Magnitude 3.5 typically produces light shaking. Major California faults can produce magnitudes 7 and above.
Why swarms occur off the Southern California coast
Offshore swarms are common along the Southern California continental margin. Stress release can produce multiple small events.
Expert commentary on aftershock probability
USGS monitors aftershock sequences after offshore events. Probability declines over 24 to 72 hours without larger follow-ons.
What To Do After an Earthquake in California
California guidance remains Drop Cover Hold On during shaking.
Immediate safety steps: Drop Cover Hold On, check for gas leaks
After shaking stops, check for gas leaks, structural damage and injuries. Avoid damaged areas.
Aftershock preparedness for the next 24-72 hours
Expect possible aftershocks. Secure heavy items and keep emergency supplies accessible.
Earthquake kit checklist from ABC7
ABC7 has compiled an earthquake kit list for preparedness. The list includes water, food, flashlight and first aid.
FAQ: Earthquake California Dana Point
How strong was the Dana Point earthquake today?
USGS reported a preliminary 3.5 magnitude at 1:22 p.m. PDT on October 5 2026.
Did the earthquake cause damage in Orange County?
No immediate damage or injuries were reported by ABC7 at time of publication.
Should I expect more aftershocks?
A 2.8 magnitude aftershock occurred at 1:23 p.m. Further small aftershocks are possible in the near term.
How to get real-time alerts for California earthquakes
ShakeAlert, USGS earthquake feed and local news provide real-time alerts.
Stay Updated
Live updates are available via USGS, ShakeAlert, ABC7 and Patch.
Monitor aftershocks, stay prepared, and follow official updates.
💡 Frequently Asked Questions (FAQ)
- Q: What was the magnitude of the earthquake California event on October 5 2026?
- A: The mainshock was 3.5 magnitude preliminary, with a 2.8 magnitude aftershock recorded at 1:23 p.m. PDT on Monday, October 5, 2026.
- Q: Where did the earthquake California strike?
- A: About 19 miles southwest of Dana Point, Orange County, at an estimated depth of 7 miles.
- Q: Were there injuries or damage reported?
- A: No immediate reports of damage or injuries have been published according to the USGS preliminary report.
- Q: Was this part of an earthquake swarm?
- A: Yes, local coverage reported a swarm of three earthquakes rattled the Orange County coast Monday afternoon and was widely felt in Orange and San Diego counties.
Extended Reading
3.5-magnitude earthquake strikes near Dana Point in Orange County – ABC7 Los Angeles. https://abc7.com/post/35-magnitude-earthquake-strikes-dana-point-orange-county/19911172/
3 Earthquakes Rattle OC Coast – Patch Laguna Niguel-Dana Point. https://patch.com/california/lagunaniguel-danapoint/3-earthquakes-rattle-oc-coast