NORTHERN CALIFORNIA — A magnitude 4.7 earthquake struck Northern California late Sunday afternoon, shaking communities near Lassen Volcanic National Park and sending light tremors as far south as the Sacramento region, according to seismologists and regional reports.
The earthquake occurred at approximately 4:41 p.m. local time, with its epicenter located north-northwest of Susanville in Lassen County. Initial automated readings briefly registered the quake at a slightly higher magnitude before being revised downward following further analysis, a common process as seismic data is refined.
The U.S. Geological Survey said the earthquake was relatively shallow, a factor that likely contributed to its wide felt range despite its moderate strength. Shallow earthquakes tend to produce sharper ground motion, allowing shaking to be noticed across multiple counties even when damage is limited.
Residents across Northern California reported feeling the tremor, including in parts of the northern Sierra and the Sacramento Valley. Hundreds of people submitted reports through the USGS “Did You Feel It?” system, describing brief but noticeable shaking lasting several seconds. No injuries or significant structural damage were immediately reported by local authorities.
A small aftershock followed shortly after the main quake, registering at a much lower magnitude. Seismologists noted that minor aftershocks are typical after earthquakes of this size and usually diminish within hours or days.
Because of the quake’s proximity to the Lassen volcanic region, some residents raised concerns about possible volcanic activity. However, scientists emphasized that earthquakes in the area are common and are not automatically linked to volcanic unrest. Northern California sits within a complex network of faults where tectonic earthquakes occur independently of volcanic systems.
Lassen County lies in a seismically active zone where small to moderate earthquakes are periodically recorded. While Sunday’s quake was among the stronger events felt in the region this year, experts said it falls well within historical patterns and does not indicate an increased immediate risk.
Emergency officials said they would continue monitoring the area for additional aftershocks but stressed there was no cause for alarm. Residents are nonetheless encouraged to review earthquake safety guidance and ensure emergency kits are prepared, as California remains one of the most seismically active states in the country.
Seismologists will continue to analyze data from the event in the coming days, including any changes to the earthquake’s magnitude, depth, or aftershock activity.
