The Hog Back slide is a large rockslide in the southern foothills of the San Gabriel Mountains, located approximately five miles north of San Antonio Heights. This broad mound of translated slide boulders produced a natural dam across San Antonio Cany . . .

In the mid-1800s, La Placita de Los Trujillos (La Placita) was situated alongside the Santa Ana River (SAR) in what is now Colton, CA. The settlement had grown to be the largest non-native community between New Mexico and Los Angeles, until the river . . .

The Yorba Linda Trend is a proposed NE-SW alignment of earthquakes near the western edge of the Los Angeles Basin in southern California first described by Egill Hauksson in the early 1990s (Hauksson, 1990). Most earthquakes in this area exhibit a str . . .