3.2-Magnitude Earthquake Strikes Near San Simeon on October 30

A 3.2-magnitude earthquake struck off the north coast of San Luis Obispo in the early hours of October 30, 2025, according to the U.S. Geological Survey (USGS).

The quake occurred at 1:14 a.m. PT about 15 kilometers north-northwest of San Simeon at a depth of 5.5 kilometers, the USGS stated. 

The tremors follow a 2.7-magnitude earthquake that shook Santa Paula on October 26, 2025. The magnitude was initially recorded as 2.8 and later downgraded to 2.7. 

California sits atop roughly 16,000 known earthquake faults, according to the California Residential Mitigation Program. Some cities like San Francisco, Los Angeles, and San Diego, all fall in the ‘high-hazard’ earthquake zones. 

The state is susceptible to earthquakes because of its location on the boundary of two active tectonic plates, the Pacific and North American Plates. Constant movement along these plates builds underground pressure that periodically releases as earthquakes. 

The USGS estimates that Southern California alone experiences nearly 10,000 quakes every year, although most of them are too small to be felt by people. 

According to the USGS, earthquakes with magnitudes of 3 and above can usually be felt by people. Such quakes are similar to vibrations caused by a passing heavy truck, and may cause hanging objects to sway. 

How to Prepare for an Earthquake?

San Luis Obispo County reminds residents that earthquakes strike without any warning. The county’s Office of Emergency Services recommends securing heavy furniture, creating a family emergency plan, and keeping a supply kit ready.

During a quake, “Drop, Cover, and Hold On,” stay away from windows, and remain indoors until the shaking completely stops. 

Earthquake preparedness begins with a detailed emergency plan. An emergency communications plan should include an out-of-state contact. An emergency supply kit should be prepared with enough water and food to last several days, a flashlight, a whistle, and a fire extinguisher. 

Securing the home can help minimize the risk of injury and damage during an earthquake. Heavy and breakable objects should be stored on low shelves and cabinets. Heavy furniture, such as bookcases and appliances, should also be anchored to walls. 

Objects that hang from the ceiling, mirrors, and other objects should be properly secured as well. 

Homeowners should consider purchasing earthquake insurance. Standard homeowner’s insurance policies often do not cover quake-related damage. 

For detailed guidance, visit ReadySLO.org or the California Office of Emergency Services.