NASA's Perseverance rover has been busy gathering bits of Mars — rock cores the size of chalk sticks, clusters of broken fragments no bigger than pencil erasers, and even grains of dust fine enough to ...

Areas scarred by the Eaton Fire are at “high to very high risk” of debris flows this week. How do they happen? What is being ...

More than a dozen atmospheric rivers dumped rainfall on California in 2023 but replenished only 25 percent of the water lost from aquifers since 2006.

Scientists using seismic data tracked groundwater levels beneath the L.A. area. They found heavy rains in 2023 boosted ...

From this information the radar is able to tell where the precipitation is occurring and how much precipitation exists ... are large and usually have a liquid surface (water-coated hailstones). Radar ...

Seismic measurement of Los Angeles’s depleted aquifers show a year of heavy precipitation hasn’t been enough to refill them ...