Marin County

Earthquakes Near Mill Valley, California

Real-time earthquake monitoring for Mill Valley and surrounding areas within 25 miles. Located in the Marin / Sausalito / San Rafael region along the San Andreas Fault.

Within 25mi

6,206

total earthquakes

30-Day Activity

recent earthquakes

Avg Magnitude

1.26

Max Recorded

4.4

Recent Activity Near Mill Valley

48 earthquakes recorded within 25 miles of Mill Valley in the last 30 days. The largest was M2.5.

Earthquake Risk in Mill Valley

Mill Valley is located in Marin County, California, one of the most seismically active regions in the United States. The city sits within the San Francisco Bay Area, which is traversed by several major fault systems.

The nearest major fault to Mill Valley is the San Andreas Fault. This fault system is capable of producing earthquakes that could cause significant ground shaking in the area. Residents are encouraged to be prepared with emergency supplies and an earthquake plan.

Mill Valley Earthquake FAQ

Is Mill Valley at risk for earthquakes?

Yes, Mill Valley is located in Marin County within the seismically active San Francisco Bay Area. The region sits near several major fault systems, including the San Andreas Fault. Scientists estimate a 72% probability of a magnitude 6.7 or greater earthquake in the Bay Area within the next 30 years.

What should I do if I feel an earthquake in Mill Valley?

If you feel shaking in Mill Valley, remember "Drop, Cover, and Hold On." Drop to your hands and knees, take cover under a sturdy desk or table, and hold on until the shaking stops. Stay away from windows, exterior walls, and anything that could fall. If you're outdoors, move away from buildings, power lines, and trees.

How do I report feeling an earthquake in Mill Valley?

You can report feeling an earthquake in Mill Valley using Bay Tremor's "Did You Feel It?" feature or through the USGS website. Your reports help scientists understand earthquake intensity distribution and improve hazard assessments for Marin County.

What is the nearest fault line to Mill Valley?

The nearest major fault to Mill Valley is the San Andreas Fault. This fault is part of the San Andreas Fault system and is capable of producing significant earthquakes. Residents should maintain emergency supplies and have an earthquake preparedness plan.

How often do earthquakes occur near Mill Valley?

The Bay Area, including areas near Mill Valley, experiences hundreds of small earthquakes each year. Most are too small to feel (below magnitude 2.0), but noticeable earthquakes occur regularly. Larger earthquakes (magnitude 4.0+) that are widely felt happen several times per year across the Bay Area.

What earthquake supplies should Mill Valley residents have?

Mill Valley residents should prepare an earthquake kit containing: 3-7 days of water (1 gallon per person per day), non-perishable food, flashlight, batteries, first aid kit, medications, important documents, cash, and a battery-powered radio. Also secure heavy furniture to walls and know how to shut off gas and electricity.

How would a San Andreas earthquake affect Mill Valley?

A major San Andreas Fault earthquake would cause significant shaking in Mill Valley. While the fault runs mostly through the Peninsula and South Bay, a magnitude 7.0+ event would be felt strongly throughout Marin County. The 1906 San Francisco earthquake (M7.9) caused widespread damage across the entire Bay Area.