Southern California Regional Rocks and Roads
Your Resource For Highways, Geology, Railroads, History, Bicycling, And More Throughout Southern California Since 1995. Celebrating 30 Years Online!
Near the southern end of the Salton Sea in the Imperial Valley, you can find some very interesting geological features. Mud volcanoes, slowly “erupting” a fine muddy ooze, are some of the evidence of the extreme heat not far below the surface here. Gases, usually carbon dioxide, also emanate from the ground here. These mud volcanoes are more active in winter and spring, when groundwater is a little higher and the surface temperatures are a bit lower. I highly recommend a visit sometime.
This morning (2/21/2020) at 5:42 am, a small earthquake struck the Castaic area north of Los Angeles. Just looking at the maps, it seems near the San Gabriel Fault but it is a somewhat complex area. It was also a very deep earthquake as they go, 18.1 km. Shaking was felt in a wide area …
On January 21, 2020, just a few days after the 26th anniversary of the Mw 6.7 Northridge Earthquake, we had another small jolt strike the San Fernando Valley. This one, while small, was felt over a wide area. If you are among the many that did feel it, the USGS wants to hear from you! …
Part 2 of my Ridgecrest earthquake field trip is now online. This time, I also won’t forget to add a link!
Finally posting the photos from my August 22, 2019 Ridgecrest trip. Part 1, which covers the fault rupture, is finally up. Part 2, which will cover the problems in Poison Canyon and Trona, are coming soon!