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

The earthquake struck at 7.46 p.m. PT about three miles northwest of Dublin, California, at a depth of seven miles, according ...

A 3.9 magnitude earthquake was recorded in Malibu, California, on Sunday evening, according to the U.S. Geological Survey.

Non-volcanic tremor ramp up precedes slow slip in Cascadia by about a day, indicating that brittle-creeping process ...

No injuries or damage has been reported as of yet but some residents in the area said they could physically feel their ...

The quake struck juts after 7:45 p.m. local time on Monday and was centered around the town of Dublin, according to the USGS.