Overview

• USGS confirmed a magnitude 4.3 quake near Berkeley early Monday that was widely felt after an initial 4.6 estimate, and the ShakeAlert system activated.
• Bay Area Rapid Transit slowed trains for track inspections, causing residual delays of up to 20 minutes, as San Francisco officials reported no injuries or damage.
• Mexico’s seismic service reported a magnitude 5.4 offshore near Jalisco, and the Navy’s tsunami center ruled out a tsunami as authorities reported no major damage.
• Peru’s geophysical institute logged a magnitude 4.0 near Lomas, Caravelí, and a magnitude 3.6 near Chilca felt in Lima, with no material damage reported.
• Seismology agencies continued routine monitoring and noted that Mexico’s SASMEX sirens did not activate for several magnitude 4 events because alert thresholds were not met.