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.
Fifty years ago, a 9.2-magnitude earthquake rocked Alaska for nearly five minutes. Once the shaking from the largest earthquake ever recorded in North America stopped, however, the worst was yet to come. [slideshow]As the sunlight waned on March 27, 1964, Alaskaâs frozen ground shivered violently.