TANAH KARO, Indonesia — An Indonesian volcano that was quiet for four centuries shot a new, powerful burst of hot ash more than 10,000 feet (three kilometers) in the air Friday, sending frightened residents fleeing to safety for the second time this week.

President Barack Obama speaks briefly on Afghanistan

Forget gut instinct, computer models and mathematics tell forecasters where storms go

Thanks to high-tech, storm track easier to predict

Villagers evacuated from slopes of Indonesian volcano return home to check on their crops

Villagers return to slopes of Indonesian volcano

Indonesian volcano erupts, catching scientists off-guard; 30,000 people flee to safety

Indonesian volcano erupts after 400 years of quiet

Geology of Chilean gold and copper mine helped miners survive with air, water and warmth

Geology helped trapped miners survive in Chile

One-two punch: Scientists discover rare double earthquake behind 2009 South Pacific tsunami

Rare double quake blamed for South Pacific tsunami

Scientists: Haiti quake was caused by previously undetected fault line, not suspected culprit

Scientists: Newly found fault caused Haiti quake

Federal official: 36-foot-long crack in W.Va. mine didn’t cause blast, disputes Massey claim

Feds, Massey dispute what caused W.Va. mine blast

Scientists’ long-range forecast: Much more of the same: A century of heat, fires, floods

Long, hot summer of fire, floods fits predictions

Scientists’ long-range forecast: More, much more of the same; a century of heat, fires, floods

Long hot summer of fire and floods fit predictions

3 earthquakes hit southern Philippines, but too deep to cause any damage or tsunami

Earthquakes hit southern Philippines; no damage

Strong aftershocks follow earthquake in distant island region of Alaska; no tsunami danger

Strong aftershocks shake Alaska island region

Strong earthquake shakes distant island region of Alaska; no tsunami danger

Strong earthquake shakes Alaska island region

Washington wakes up to what? Minor earthquake rattles the DC area; no injuries reported

Washington wakes up to wha? Minor earthquake rattles the DC area; no injuries reported

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Southern California earthquake related to April’s Baja quake; no major damage or injuries

S. California earthquake related to Easter temblor

Southern California earthquake related to April’s Baja quake, no damage or injuries

Magnitude-5.4 quake strikes SoCal desert

LOS ANGELES — The earthquake that rattled through Southern California with only minor damage and no injuries came as no surprise to seismologists.

Scientist studying Indonesia’s last glacier says it will disappear in years, not decades

Indonesia’s last glacier will melt within years

Alaska geologist mauled by grizzly grateful for training on surviving bear attacks

Alaska geologist survives two attacks by grizzly

Alaska geologist mauled twice by grizzly survived by playing dead

Alaska geologist survives 2 attacks by grizzly

Magnitude-5.7 quake, aftershocks rattle Calif-Mexico border region that saw deadly April quake

Aftershocks rattle Calif-Mexico border region

SKorea says rocket carrying observation satellite believed to have exploded in flight

SKorea says rocket believed to have exploded

SKorea launches satellite a day after delay due to fire safety problems

SKorea launches satellite after delay

SEOUL, South Korea — South Korea has launched a rocket carrying a satellite meant to study climate change a day after the ambitious project was delayed due to malfunctioning firefighting equipment.