Strong California quake shakes famed wine country (Update 2)

The strongest earthquake in the San Francisco Bay area in 25 years struck the heart of California's wine country early Sunday, igniting gas-fed fires, damaging some of the region's famed wineries and historic buildings, and ...

Scientists pinpoint great-earthquake hot spots

The world's largest earthquakes occur at subduction zones - locations where a tectonic plate slips under another. But where along these extended subduction areas are great earthquakes most likely to happen? Scientists have ...

Solar flares: What does it take to be X-class?

Solar flares are giant explosions on the sun that send energy, light and high speed particles into space. These flares are often associated with solar magnetic storms known as coronal mass ejections (CMEs). The number of ...

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