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Date published: December 6, 2002

USGS Studies Cast Major Doubts on Geologic Theory of How Volcanic Regions Created: Mantle Plumes May Be Nonexistent After All

Standard fare in geology textbooks and school classrooms across the world is that the hot springs, geysers and volcanoes of Yellowstone National Park, Hawaii, Iceland, and many other volcanic regions were "created" by plumes of hot rock that rise from near the Earth’s core.

Date published: December 3, 2002

Shedding Light on Amphibian Declines: New Research Finds That Ultraviolet Radiation May Not Be a Factor in Amphibian Population Declines

Two reports published in a leading science journal cast doubt on the importance of ultraviolet-b radiation (UV-B) as a factor driving amphibian population declines. Scientists with the U.S. Geological Survey (USGS), the University of Washington, and the U.S. Environmental Protection Agency just released their research findings in the journal Ecology.

Date published: November 21, 2002

To Thin or Not to Thin

Recent studies show that thinning of young forests can benefit the development of old-growth characteristics and the diversity of plants and animals, but only if methods are used that protect and promote the development of shrubs, hardwoods, and large or old trees.

Date published: November 20, 2002

Unearthing the San Andreas Fault Zone: Seismic History Suggests Big Quakes Impending in California

An in-depth analysis of major long-term research on the San Andreas fault indicates that parts of the fault are likely to experience a major temblor sooner than previously believed, including the section near Palm Springs and the San Bernardino-Riverside areas, and the Hayward fault in the Bay Area.

Attribution:
Date published: November 16, 2002

Science, Location and Luck Minimized Alaska's Earthquake Damage

Sunday’s magnitude (M) 7.9 central Alaska earthquake was one of the largest recorded earthquakes in our Nation’s history. The epicenter of the Nov. 3 temblor was located approximately 75 miles (135 km) south of Fairbanks and 176 miles (283 km) north of Anchorage.

Date published: November 13, 2002

"Hurricane" Turtles of South Carolina's Tidal Creeks

Hurricanes brush or hit Charleston, S.C., about once every five and a half years, often generating large storm surges on top of already impressive tides. A hurricane that hit Charleston in 1752 caused a storm surge that nearly covered the entire present downtown area, according to one source. When the wind shifted, the water level fell 5 feet in 10 minutes.

Date published: November 8, 2002

Shaking it Up in Alaska: ShakeMap Released for 7.9 Earthquake

A ShakeMap portraying the variations in shaking intensity from the Nov. 3, 2002, 7.9-magnitude earthquake was released today by the U.S. Geological Survey and the University of Alaska, Fairbanks. The map is the first ShakeMap produced for the state of Alaska and is considered a prototype.

Attribution: Region 11: Alaska
Date published: November 7, 2002

Alaska Interior Reveals Scars and Ruptures from 7.9 Denali Fault Quake

Sunday’s magnitude 7.9 earthquake in central Alaska created a scar across the landscape for more than 145 miles, according to surveys conducted the past two days by geologists from the U.S. Geological Survey and the Alaska Division of Geological and Geophysical Survey.

Attribution: Region 11: Alaska
Date published: October 29, 2002

USGS Releases Atlas of Natural Hazards of Hawaii's Coastal Areas

When most people think of Hawaii, they think of a tranquil tropical paradise. But savvy Hawaiians know better: an old proverb says that "when the gales blow, the sea is white-backed; when the sea rises, corals are washed ashore."

Date published: October 29, 2002

Protecting the Public From Earthquake Hazards - Advanced National Seismic System Comes to Memphis

October marks a new milestone in the installation of modern seismic stations in seismically active urban areas across the country. These cities include Memphis, San Francisco, Seattle, Salt Lake City, Anchorage, and Reno.

Date published: October 25, 2002

Scientists To Conduct Seismic Experiments Near Memphis

Scientists from the U.S. Geological Survey (USGS) and the Center for Earthquake Research and Information (CERI) at The University of Memphis will create two artificial earthquakes in the New Madrid Seismic Zone to learn how the thick layers of sand and clay sediments react to seismic waves.

Date published: October 25, 2002

M6.7 Nenana Mountain, Alaska, Earthquake

On October 23, 2002, a strong magnitude (M) 6.7 earthquake occurred at 3:27 AM Local time 85 miles (135 km) south of Fairbanks and 172 miles (276 km) north of Anchorage. The earthquake was felt broadly, from Fairbanks in the north to Anchorage in the south, a distance of 255 miles. Because of the remote location, however, there was very little damage.