One of California's latest national monuments is an enormous, pristine section of mountains, lakes, and lava flows in the ...

An earthquake struck near Malibu in California on Sunday afternoon. Tremors were felt in Los Angeles, Thousand Oaks and Long ...

Magnitude-3.4 at 12:46 a.m. March 11 at 10 miles southeast of Pāhala and depth of 20 miles. Magnitude-3.4 at 4:08 p.m. March ...

At Mount St. Helens, volcano monitoring and trail maintenance efforts are set to degrade without help from federal agencies.