Whose fault? Blame the earthquake In this March 17, 2014, file photo, Egill Hauksson a Caltech Seismologist talks about an early morning earthquake during a news conference at Caltech in Pasadena, Calif. A new study says an earthquake fault running from San Diego to Los Angeles is capable of producing a magnitude-7.4 temblor that could affect some of the most densely populated areas in California. (AP Photo/Nick Ut, File/AP Photo/Rich Pedroncelli, File)
Whose fault? Blame the earthquake
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An earthquake fault runs from San Diego Bay to Los Angeles. It is in Southern California. The fault is capable of producing a magnitude-7.4 earthquake. That could affect some of the region's most densely populated areas. This is according to a study released March 7.
 
The study looked at the Newport-Inglewood and Rose Canyon systems. These previously were thought to be separate. The researchers concluded the systems actually form a continuous fault. It is underwater. It runs from San Diego Bay to Seal Beach in Orange County. On land, it runs through the Los Angeles basin.
 
The fault poses a significant hazard. It could impact coastal Southern California and Tijuana, Mexico, according to the study.
 
It could produce up to a magnitude-7.3 quake if the offshore segments rupture. It could be a magnitude-7.4 quake if the onshore segment also ruptures. The study was conducted by Scripps Institution of Oceanography at the University of California San Diego.
 
Even a moderate quake on the fault could have a major impact on the region. That is according to Valerie Sahakian. She is the study's lead author.
 
"This system is mostly offshore but never more than four miles from the San Diego, Orange County, and Los Angeles County coast," Sahakian was quoted in a press release from the American Geophysical Union.
 
The fault's most recent major rupture occurred in 1933 in Long Beach. It produced a magnitude-6.4 earthquake that killed 115 people.
 
The study looked at data from previous and new seismic surveys. They included sonar studies of the offshore fault. Researchers looked at four segments of the fault that were offset. These are known as stepovers. The researchers found the disconnections weren't wide enough to prevent the entire offshore section of the fault from rupturing.
 
Researchers also looked at the onshore segment of the fault. They concluded that there have been three to five ruptures in the past 11,000 years along the northern section and one quake about 400 years ago at the southern end.
 
Researchers at the Nevada Seismological Laboratory assisted with the study. It was funded by Southern California Edison. It was accepted for publication in the American Geophysical Union's Journal of Geophysical Research.

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CRITICAL THINKING QUESTION
Why do so many people live in California, despite the earthquake risk?
Write your answers in the comments section below


COMMENTS (24)
  • antonioc1222-
    3/15/2017 - 10:14 a.m.

    They probably live there because they either have family there or its a beautiful place and want to live there.

  • brandons33446-
    3/15/2017 - 10:18 a.m.

    People continue to live in California because even though there is a risk the risk is very low.

  • jackiek-orv
    3/15/2017 - 11:35 a.m.

    so many people live in California because its a popular place

  • gisellec-bur
    3/15/2017 - 09:17 p.m.

    so many people that live in California despite the earthquake risk. because it along a fault line occur the major earthquakes. Reminds me that one time I was in California and a small earthquake occur I was really scared.

  • Nikolaij
    3/16/2017 - 08:36 a.m.

    because of the nice weather and its cheaper

  • cesars-
    3/16/2017 - 08:39 a.m.

    People live in California despite the earthquake risk because of how things are that people enjoy.

  • alant-
    3/16/2017 - 08:39 a.m.

    It's because of the beaches and how hot it is over in California and parts of California.

  • sylerh-smi
    3/16/2017 - 02:00 p.m.

    Many people live in California because there is a beach and movie stars.

  • galenk-smi
    3/16/2017 - 03:13 p.m.

    I think some people like to live in a warm climate. Also the communities are filled with unique and special people . But do to its earthquakes the state is dangerous and most famous in America for earthquakes also.

  • mchristian-dav
    3/16/2017 - 04:27 p.m.

    That's impressive, I hope we find a way to safely and effectively prevent earthquakes in the near or distant future.

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