A powerful, 8.6-magnitude earthquake and an 8.2-magnitude aftershock off the west coast of Northern Sumatra today led authorities to warn that potentially devastating tsunamis might roar across the Indian Ocean.
But to the relief of millions who were immediately reminded of the devastating tsunami that rolled across that ocean in 2004, the waves generated by today's temblors were minor and the tsunami "watch" was canceled just before 9 a.m. ET.
The other welcome news: Initial reports indicated that damage from the quakes themselves may not have been extensive.
A huge earthquake shook the ocean floor off the coast of Indonesia Wednesday. Early measurements by the U.S. Geological Survey give it a strength of 8.7. Surrounding nations have issued tsunami warnings.
For those who just felt the earth shake in Northern California, the U.S. Geological Survey says there was a 4.0 magnitude temblor in the "San Francisco bay area" at 5:33 a.m. local time (8:33 a.m. ET).
There's no word yet on whether there was much, if any, damage.
The USGS says the quake was centered about 1 mile from El Cerrito, Calif.