1 Water molecules have a. 2  because the electrons in each covalent bond between the oxygen and each hydrogen are unequally shared-the electrons are closer to the oxygen. 3  This means that each water molecule has a partial negative charge on the oxygen and partial positive charges on the hydrogens.
The 7.9 magnitude quake, which rattled the area Nov. 3, 2002, has been the subject of research and fascination since. Scientific studies of the quake, whose epicenter was about 90 miles south of Fairbanks, spawned new national standards for building bridges and are providing a deeper understanding of how earthquakes affect frozen ground.
The earthquake struck Sunday at 1:30 a.m. local time in the area of Old Iliamna, about 162 miles south of Anchorage, said the U.S. Geological Survey. The Alaska Earthquake Center recorded about 30 aftershocks in the first two-and-a-half hours after the quake. The largest, at 3:37 a.m. local time, was measured at magnitude 4.3. There is no threat of a tsunami as a result of the quake. There have been no reports of injuries so far.