Radar image of the Los Angeles Basin
Click on image for full size
Image courtesy of NASA
Los Angeles Heading for the Hills
News story originally written on October 28, 1998
Scientists have discovered that downtown and West Los Angeles appear to be
moving about one-fifth of an inch per year toward the San Gabriel
The measurements were made using the Southern California Integrated Global
Positioning System Network (SCIGN), a network of GPS satellites that can
detect tiny movements in earthquake faults
California. The system uses radio signals from 24 different GPS
satellites to pinpoint the locations of ground receiver stations within 0.4
inches. There are currently about 60 receiver stations in the greater Los
Angeles area; ultimately there will be 250 stations.
"We've known for some time that the area between the coastline and the
Mojave Desert is being squeezed together by the constant movement of the
Earth's crust," said Dr. Donald Argus, a geophysicist at JPL.
The project is designed to monitor the slow, small movement of the ground in
Southern California. "This research helps us learn where earthquakes are
more likely to happen, and helps with estimating the regional earthquake
hazard in Southern California," said Dr. Dr. Frank Webb, chair of the SCIGN.
Last modified February 26, 2007 by Lisa Gardiner.
Shop Windows to the Universe Science Store!
Our online store
on science education, classroom activities in The Earth Scientist
specimens, and educational games
You might also be interested in:
It was another exciting and frustrating year for the space science program. It seemed that every step forward led to one backwards. Either way, NASA led the way to a great century of discovery. Unfortunately,...more
The Space Shuttle Discovery lifted off from Kennedy Space Center at 2:19 p.m. EST, October 29th. The sky was clear and the weather was great as Discovery took 8 1/2 minutes to reach orbit for the Unitied...more
A moon was discovered orbiting the asteroid, Eugenia. This is only the second time in history that a satellite has been seen circling an asteroid. A special mirror allowed scientists to find the moon...more
Will Russia ever put the service module for the International Space Station in space? NASA officials are demanding an answer from the Russian government. The necessary service module is currently waiting...more
During a period of about two days in early May, 1998, the ACE spacecraft was immersed in plasma associated with a coronal mass ejection (CME). The SWICS instrument on ACE, which determines unambiguously...more
J.S. Maini of the Canadian Forest Service has referred to forests as the "heart and lungs of the world." Forests reduce soil erosion, maintain water quality, contribute to atmospheric humidity and cloud...more
In late April through mid-May 2002, all five naked-eye planets are visible simultaneously in the night sky! This is includes Mercury which is generally very hard to see because of its proximity to the...more