VansTripp
December 24th, 2004, 12:07 AM
It have been nearly 11 years after Northridge Earthquake. It time for history. :cheers:
TIME January 17, 1994 / 4:30:55 am PST
LOCATION 34° 12.80' N, 118° 32.22' W 20 miles west-northwest of Los Angeles 1 mile south-southwest of Northridge
MAGNITUDE MW6.7
TYPE OF FAULTING blind thrust - ANIMATION
FAULTS INVOLVED Northridge Thrust (also known as Pico Thrust) several other faults experienced minor rupture, rupture during large aftershocks, or triggered slip
DEPTH 18.4 km
http://www.data.scec.org/chrono_index/images/blindani.gif
At 4:30 am, on January 17, 1994, residents of the greater Los Angeles area were rudely awakened by the strong shaking of the Northridge earthquake. This was the first earthquake to strike directly under an urban area of the United States since the 1933 Long Beach earthquake.
The earthquake occurred on a blind thrust fault, and produced the strongest ground motions ever instrumentally recorded in an urban setting in North America. Damage was wide-spread, sections of major freeways collapsed, parking structures and office buildings collapsed, and numerous apartment buildings suffered irreparable damage. Damage to wood-frame apartment houses was very widespread in the San Fernando Valley and Santa Monica areas, especially to structures with "soft" first floor or lower-level parking garages. The high accelerations, both vertical and horizontal, lifted structures off of their foundations and/or shifted walls laterally.
http://autoinfo.smartlink.net/quake/Freeway.jpg
http://autoinfo.smartlink.net/quake/Quake.jpg
http://autoinfo.smartlink.net/quake/I5slice.gif
http://autoinfo.smartlink.net/quake/valencia.jpg
http://autoinfo.smartlink.net/quake/Officez.jpg
http://autoinfo.smartlink.net/quake/kitchen-.jpg
http://autoinfo.smartlink.net/quake/10fwy.jpg
http://autoinfo.smartlink.net/quake/Column.jpg
http://autoinfo.smartlink.net/quake/Garage.jpg
http://autoinfo.smartlink.net/quake/Broadway.jpg
http://autoinfo.smartlink.net/quake/Flatcar.jpg
http://autoinfo.smartlink.net/quake/Noside.jpg
http://autoinfo.smartlink.net/quake/Fire.jpg
Source: http://autoinfo.smartlink.net/quake/quake.htm
http://www.data.scec.org/chrono_index/images/nrhosp.gif
http://www.data.scec.org/chrono_index/images/ncsun2.gif
http://www.data.scec.org/chrono_index/images/ncsun1.gif
http://www.data.scec.org/chrono_index/images/tiltapt.gif
http://www.data.scec.org/chrono_index/images/north118.gif
http://www.data.scec.org/chrono_index/images/nrkaiser.jpg
http://www.data.scec.org/chrono_index/images/nrfire.gif
http://www.data.scec.org/chrono_index/images/nrtilted.gif
http://www.data.scec.org/chrono_index/images/nrrent.gif
http://www.data.scec.org/chrono_index/images/carsqsh.gif
http://www.data.scec.org/chrono_index/images/nrbrick.gif
http://www.data.scec.org/chrono_index/images/northtop.gif
http://www.data.scec.org/chrono_index/images/nri10.gif
More Information:
Despite the losses, gains made through earthquake hazard mitigation efforts of the last two decades were obvious. Retrofits of masonry building helped reduce loss of life, hospitals suffered less structural damage than in 1971 San Fernando earthquake, and emergency response was exemplary. The Northridge earthquake proved that preparing for earthquakes CAN greatly reduce the risk.
The earthquake brought home several important lessons. When earthquakes occur directly beneath a city, it will be subjected to ground motions with peak accelerations approaching the force of gravity, exceeding the levels of shaking anticipated by building codes. Systems of concealed faults under the Los Angeles area are more complex than previously thought. The significant fracturing of welds in steel frame buildings was unexpected because of the ductility of steel. Understanding the cause and correcting the problem will be essential to continue building in earthquake prone regions.
Source: http://www.data.scec.org/chrono_index/northreq.html
P.S. Chicgoian nothing know about earthquake MAGNITUDE so one guy said Los Angeles only have 8.5 magnitude then he's WRONG. Los Angelian really know about earthquake!!! :cheers:
TIME January 17, 1994 / 4:30:55 am PST
LOCATION 34° 12.80' N, 118° 32.22' W 20 miles west-northwest of Los Angeles 1 mile south-southwest of Northridge
MAGNITUDE MW6.7
TYPE OF FAULTING blind thrust - ANIMATION
FAULTS INVOLVED Northridge Thrust (also known as Pico Thrust) several other faults experienced minor rupture, rupture during large aftershocks, or triggered slip
DEPTH 18.4 km
http://www.data.scec.org/chrono_index/images/blindani.gif
At 4:30 am, on January 17, 1994, residents of the greater Los Angeles area were rudely awakened by the strong shaking of the Northridge earthquake. This was the first earthquake to strike directly under an urban area of the United States since the 1933 Long Beach earthquake.
The earthquake occurred on a blind thrust fault, and produced the strongest ground motions ever instrumentally recorded in an urban setting in North America. Damage was wide-spread, sections of major freeways collapsed, parking structures and office buildings collapsed, and numerous apartment buildings suffered irreparable damage. Damage to wood-frame apartment houses was very widespread in the San Fernando Valley and Santa Monica areas, especially to structures with "soft" first floor or lower-level parking garages. The high accelerations, both vertical and horizontal, lifted structures off of their foundations and/or shifted walls laterally.
http://autoinfo.smartlink.net/quake/Freeway.jpg
http://autoinfo.smartlink.net/quake/Quake.jpg
http://autoinfo.smartlink.net/quake/I5slice.gif
http://autoinfo.smartlink.net/quake/valencia.jpg
http://autoinfo.smartlink.net/quake/Officez.jpg
http://autoinfo.smartlink.net/quake/kitchen-.jpg
http://autoinfo.smartlink.net/quake/10fwy.jpg
http://autoinfo.smartlink.net/quake/Column.jpg
http://autoinfo.smartlink.net/quake/Garage.jpg
http://autoinfo.smartlink.net/quake/Broadway.jpg
http://autoinfo.smartlink.net/quake/Flatcar.jpg
http://autoinfo.smartlink.net/quake/Noside.jpg
http://autoinfo.smartlink.net/quake/Fire.jpg
Source: http://autoinfo.smartlink.net/quake/quake.htm
http://www.data.scec.org/chrono_index/images/nrhosp.gif
http://www.data.scec.org/chrono_index/images/ncsun2.gif
http://www.data.scec.org/chrono_index/images/ncsun1.gif
http://www.data.scec.org/chrono_index/images/tiltapt.gif
http://www.data.scec.org/chrono_index/images/north118.gif
http://www.data.scec.org/chrono_index/images/nrkaiser.jpg
http://www.data.scec.org/chrono_index/images/nrfire.gif
http://www.data.scec.org/chrono_index/images/nrtilted.gif
http://www.data.scec.org/chrono_index/images/nrrent.gif
http://www.data.scec.org/chrono_index/images/carsqsh.gif
http://www.data.scec.org/chrono_index/images/nrbrick.gif
http://www.data.scec.org/chrono_index/images/northtop.gif
http://www.data.scec.org/chrono_index/images/nri10.gif
More Information:
Despite the losses, gains made through earthquake hazard mitigation efforts of the last two decades were obvious. Retrofits of masonry building helped reduce loss of life, hospitals suffered less structural damage than in 1971 San Fernando earthquake, and emergency response was exemplary. The Northridge earthquake proved that preparing for earthquakes CAN greatly reduce the risk.
The earthquake brought home several important lessons. When earthquakes occur directly beneath a city, it will be subjected to ground motions with peak accelerations approaching the force of gravity, exceeding the levels of shaking anticipated by building codes. Systems of concealed faults under the Los Angeles area are more complex than previously thought. The significant fracturing of welds in steel frame buildings was unexpected because of the ductility of steel. Understanding the cause and correcting the problem will be essential to continue building in earthquake prone regions.
Source: http://www.data.scec.org/chrono_index/northreq.html
P.S. Chicgoian nothing know about earthquake MAGNITUDE so one guy said Los Angeles only have 8.5 magnitude then he's WRONG. Los Angelian really know about earthquake!!! :cheers: