Yet another earthquake has hit Indonesia, the second in as many days, with a magnitude of 6.8, so far more than 400 people have been killed. Fearing a tsunami, thousands fled, while rescue workers had already been digging through collapsed buildings for victims of the first quake. The epicenter was about 180 miles away from Wednesday's stronger quake, which measured 7.9 on the Richter scale and occurred about 30 miles off the coast, near the city of Padang, a city of 900,000. That one killed at least 200. Earlier this week, a third earthquake rocked the Samoan islands, causing a tsunami that killed more than 100 when 20-foot waves smashed buildings and swept some people out to sea. President Obama has declared American Samoa to be a federal disaster area. The first two events were separated by 16 hours and 6,000 miles, and scientists say they're unrelated.