Overview

• The USGS recorded the magnitude 3.5 quake at 4:54 p.m. Tuesday with an epicenter one mile from Fontana and a depth of 3.6 miles.
• Residents in the Inland Empire and as far south as San Clemente reported weak shaking but no injuries or damage.
• This was the fifth quake of magnitude 3.0 or greater in the area over the past ten days.
• California and Nevada average about 234 earthquakes of magnitude 3.0 to 4.0 annually, reflecting the region’s typical seismic pattern.
• Authorities emphasize real-time monitoring through ShakeAlert and encourage public preparedness via tools like the USGS reporting system and the Unshaken newsletter.