The system will detect the beginning of a quake and send out alerts warning residents that they have a few seconds to prepare for a possibly deadly temblor.
Rescuers continue to search for survivors of Monday's quake, which trapped people in a collapsed supermarket in Pampanga province and caused panicked office workers to flee buildings in Manila.
A new catalog of Southern California earthquakes is 10 times larger than its predecessor list. The details of frequent, small quakes help scientists study what triggers large, destructive ones.
Relief agencies are having trouble reaching stricken areas, setting off looting of stores and aid supplies. The death toll from the tsunami and quake could rise further, officials warn.
The two satellites, which are collectively called GRACE and will replace two retired probes, are one of the most important tools for understanding the effects of climate change.
An earthquake of preliminary magnitude 4.2 hit Wednesday night. Earthquakes used to be rare in Oklahoma. Scientists say they're linked to the disposal of wastewater from fracking.
The mayor said the island looked like it was "flattened by bombs." The magnitude 6.3 earthquake hit Monday afternoon off the coast of Lesbos in the Mediterranean Sea.
A magnitude 6.5 quake on the coast of Aceh province has destroyed hundreds of buildings. Authorities say there's no risk of tsunami, like the one in 2004 triggered by a quake in the same area.
Officials put the death toll at more than 240. There is a fairly narrow window of time after a quake when survivors can be saved from collapsed buildings, and search crews are fighting the clock.
A magnitude 3.5 earthquake struck in a remote part of the northern Nevada desert near where the annual Burning Man counterculture festival is held, but there's been no report of any damage.
RENO, Nev. (AP) — A new report raising the likelihood of a destructive earthquake striking Salt Lake City in the next half century underscores the urgency to retrofit more than 30,000 older brick homes and other unreinforced buildings at high risk of collapsing.
LITTLEFIELD, Ariz. (AP) — The Arizona Geological Survey says it has no reports of damage or injury from a recent swarm of small earthquakes in a sparsely populated area of the state's northwestern corner.
Parts of Oklahoma and Texas have about the same risk of an earthquake as parts of California, the maps show. Why? Wastewater that oil and gas operations are pumping into wells adds pressure on faults.
