4.9 Magnitude Quake Rattles Northern California

Epicenter struck near Boulder Creek, about 65 miles from San Francisco.

Apr. 2, 2026 at 5:28pm

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A 4.9 magnitude earthquake shook Northern California early Thursday morning, according to the United States Geological Survey (USGS). The quake's epicenter was located near the town of Boulder Creek, approximately 65 miles southeast of San Francisco, at a depth of 10.9 km.

Why it matters

Earthquakes of this magnitude can cause moderate damage, especially to older structures, and may be felt over a wide area. The region around Boulder Creek has a history of seismic activity, and residents will be on alert for potential aftershocks.

The details

The 4.9 magnitude quake struck at a depth of 10.9 km, which is considered a relatively shallow depth that can amplify the shaking felt at the surface. No immediate reports of significant damage or injuries have been reported, but authorities are still assessing the situation.

  • The earthquake occurred early Thursday morning, April 2, 2026.

The players

United States Geological Survey (USGS)

The USGS is the scientific agency of the United States government responsible for studying the landscape, its natural resources, and the natural hazards that threaten it.

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What’s next

Authorities will continue to monitor the situation for any reports of damage or the need for emergency response. Residents in the affected area are advised to be prepared for potential aftershocks in the coming hours and days.

The takeaway

This earthquake serves as a reminder of the seismic risks faced by Northern California communities and the importance of emergency preparedness. While the shaking may have been unsettling, the relatively moderate magnitude suggests the region's infrastructure and building codes are helping to mitigate the potential for serious harm.