Question 1

Is Atherton at risk for earthquakes?

Accepted Answer

Yes, Atherton is located in San Mateo 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.

Question 2

What should I do if I feel an earthquake in Atherton?

Accepted Answer

If you feel shaking in Atherton, 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.

Question 3

How do I report feeling an earthquake in Atherton?

Accepted Answer

You can report feeling an earthquake in Atherton 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 San Mateo County.

Question 4

What is the nearest fault line to Atherton?

Accepted Answer

The nearest major fault to Atherton 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.

Question 5

How often do earthquakes occur near Atherton?

Accepted Answer

The Bay Area, including areas near Atherton, 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.

Question 6

What earthquake supplies should Atherton residents have?

Accepted Answer

Atherton 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.

Question 7

How would a San Andreas earthquake affect Atherton?

Accepted Answer

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

Earthquakes Near Atherton, California

Earthquake Risk in Atherton

Atherton Earthquake FAQ