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.
Seven of the ten largest earthquakes in the United States were in Alaska; Since 1900, Alaska has had an average of: One great earthquake (magnitude 8 or larger) earthquake every 13 years; One magnitude 7 to 8 earthquake every year; Six magnitude 6 to 7 earthquakes per year; Forty five magnitude 5 to 6 earthquakes per year; Three hundred twenty magnitude 4 to 5 earthquakes per year; An average of a 1,000 earthquakes are located in Alaska each month; 1. HAZUS 99 Estimated Annualized ...