Crust of Tibetan Plateau is being squeezed by India and Asia, new study shows

Geophysicists have discovered why there are high plains and mountains in the Himalayas for trekkers to trek on. According to new data, the soft crust of the Tibetan Plateau is being squeezed like an accordion between the harder crusts of India and Asia.

Spring Colloquium 98: Mars Exploration—Past, Present, and Future

PASADENA—The San Gabriel Valley Section of the American Institute of Aeronautics and Astronautics will present "Spring Colloquium 98: Mars Exploration—Past, Present, and Future" on Tuesday, June 9, from 6–9:30 p.m. in von Karman Auditorium at the Jet Propulsion Laboratory, located at 4800 Oak Grove Drive in Pasadena. This year's program will provide a comprehensive overview of America's past, present, and potential future Mars exploration missions. The public is invited and encouraged to attend.

Posthumous Paper by Gene Shoemaker Details Evidence of Comet Shower That Pummeled Earth 36 Million Years Ago

Geochemical evidence from a rock quarry in northern Italy indicates that a shower of comets hit Earth about 36 million years ago.

Geophysicists model the Cretaceous motions of Australia

The theory of plate tectonics says that Earth's crust has moved horizontally by thousands of miles over millions of years. For visual evidence, one need look no further than a map showing how nicely South America and Africa fit together.

Don Anderson Will Be Awarded the 1998 Crafoord Prize

The Royal Swedish Academy of Sciences is to award the 1998 Crafoord Prize in geosciences, with special emphasis upon "the dynamics of the deeper parts of the Earth," to Don L. Anderson of the California Institute of Technology and to Adam M. Dziewonski from Harvard University for their fundamental contributions to our knowledge of the structures and processes in Earth's interior.

Geologists find more evidence for an active fault beneath downtown and east Los Angeles

Geologists report new evidence for a fault beneath Los Angeles that could cause damaging earthquakes in the future.

Yucca Mountain Is Possibly More Seismically Active Than Once Believed, Geologists Discover

Recent geodetic measurements using Global Positioning System (GPS) satellites show that the Yucca Mountain area in southern Nevada is straining roughly 10 to 100 times faster than expected on the basis of the geologic history of the area. And for the moment at least, geologists are at a loss to explain the anomaly.

Mars Global Surveyor already bringing in scientific payoff

Despite a 12-month delay in aerobraking into a circular orbit, the Mars Global Surveyor is already returning a wealth of data about the atmosphere and surface of the Red Planet.

Biological Activity the Likely Culprit of Atmospheric Nitrous Oxide Increases

New research suggests that the changing concentration of nitrous oxide in the atmosphere is largely a result of biological activity.

Geophysicists Develop Model to Describe Huge Gravity Anomaly of Hudson Bay Region

Using a new approach to analyzing planetary gravity fields, two geophysicists, Mark Simons at the California Institute of Technology and Bradford Hager at M.I.T., have shown that incomplete glacial rebound can account for a substantial portion of the Hudson Bay gravity anomaly. Geophysicists Develop Model to Describe Huge Gravity Anomaly of Hudson Bay Region December 1997 97


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