The ground beneath Northern California trembled on the morning of June 24, 2026, as a 5.6 magnitude earthquake struck near the small community of Redwood Valley. The seismic event, centered about seven miles north of Redwood Valley, sent shockwaves through the region, affecting residents from San Francisco to Eureka.
The U.S. Geological Survey (USGS) reported that the earthquake occurred at approximately 8:10 a.m. PT, with a depth of about five miles. The tremors were felt widely, with residents reporting varying degrees of shaking intensity. Following the initial quake, several aftershocks were recorded, the largest of which measured below 3.0 on the Richter scale.
Assessing the impact: damage and injuries
The earthquake’s impact was felt most acutely in Mendocino County where residents reported cracked home structurescaved-in roofs and fallen objects. The Redwood Valley Market owned by Alex Chehada, experienced significant damage as broken wine bottles and scattered groceries littered the aisles. Chehada described the earthquake as the strongest he had felt in his 23 years in the area.
Injuries were reported, although the nature and extent of these injuries remain unclear. The Mendocino County Executive Office confirmed that hospitals had received some injury reports but provided no further details. Power outages affected more than 6,000 residents in six towns near the epicenter, with PG&E reporting that 10,000 customers lost power in the county.
Scientific perspective: understanding the earthquake
Scientists from the USGS Earthquake Science Center provided insights into the earthquake’s characteristics. Research geophysicist Sarah Minson noted that the epicenter’s location in a remote area likely mitigated the The shaking intensity was strong near the source but decayed rapidly, limiting the area of significant impact.
The earthquake is believed to have occurred on the Maacama Fault a fault system capable of producing major earthquakes up to a magnitude of 7.5. The Maacama Fault runs 110 miles from Healdsburg in Sonoma County to Laytonville in Mendocino County. Minson explained that the fault system has shaped the region’s landscape over millions of years, similar to how other faults have defined California’s geography.
Community response and preparedness
In the aftermath of the earthquake, communities near the epicenter rallied to assess and address the damage. The California Office of Emergency Services reported that 657,000 early warning alerts were sent by the MyShake app notifying residents of the impending tremors. The alerts helped residents prepare for the shaking, although some still experienced significant disruptions.
Residents shared their experiences of the earthquake, describing the shaking as a big rolling wave that lasted for several seconds. Some reported hearing loud, crashing sounds as objects fell from shelves and walls. Despite the damage, there were no immediate reports of major structural failures or fatalities.
The earthquake serves as a reminder of the importance of earthquake preparedness in California. Residents are encouraged to have emergency kits ready, secure heavy furniture, and know the safest spots in their homes during an earthquake. The event also highlights the value of early warning systems in mitigating the impact of seismic events.
