Andreas Fault Map – Earthquakes on the Puente Hills thrust fault could be particularly dangerous because the shaking would occur directly beneath LA’s surface infrastructure. . Southern California has been shaken by two recent earthquakes. The way they were experienced in Los Angeles has a lot to do with the sediment-filled basin the city sits upon. .
Andreas Fault Map San Andreas Fault Line Fault Zone Map and Photos: While Californiaโs 750-mile-long San Andreas Fault is notorious, experts believe a smaller fault line posesses a greater threat to lives and property in the southern part of the state. According to . Monday’s magnitude 4.4 quake that rattled Southern California is believed to have struck on a well-known and dangerous fault system known as the Puente Hills thrust fault system. .