California wine, which can produce an 8.0-magnitude earthquake, began sliding after the Ridgecrest earthquake sequence this summer, according to a study published Thursday in the journal Science.
But the unprecedented movement on the 160-mile Garlock fault is not just a takeaway, said Zachary Ross, lead author of the study from scientists at the California Institute of technology and NASA.
“We really need to remind ourselves that California is an earthquake country,” Ross said. “So it’s not just thinking about the biggest, most devastating potential scenarios, like the events at San Andreas, but remembering that there is potential for danger almost everywhere.”
About 20 faults have created Ridgecrest earthquake sequences, the study found, by triggering each other similar to dominoes. While each individual fault may not have created the 6.4 and 7.1 shakers themselves, Ross said the potential for multiple fault breaks requires further attention.
The magnitude 7.1 quake on July 6 was the most powerful earthquake in nearly 20 years in the Golden state. There has never been an 8.0 earthquake in California; the strongest on record is 7.9 near Fort Tejon in 1857, according to the state Department of environmental protection.
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The study was published the same day the state of California released an earthquake early warning app and on the 30th anniversary of the magnitude 6.9 Loma Prieta earthquake along the San Andreas fault.
Roughly one-fifth the length of the San Andreas, Garlock fault runs along the Mojave desert in southern California. The break from the second earthquake in the Ridgecrest sequence ended just a few miles from Garlock, which caused the fault to start moving slowly.
How the movement could affect the risk of future earthquakes, Ross said, will be determined. A large temblor has not erupted on Garlock in about 500 years, added an associate Professor of Geophysics at the California Institute of technology.
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With the launch of the California earthquake warning app, officials are urging all residents to download it as a precaution, no matter how close they live to major faults.
“There is a risk of an earthquake across the state,” the frequently asked questions on the app’s website reads. “If earthquakes are large enough, the energy spreads much wider than most imagine.”
How much advance notification users receive will vary depending on the distance from the start of the earthquake, the page says. Those near the epicenter can feel the shaking before they receive a warning saying, ” Earthquake, earthquake. Expect a shake. Drop the Lid and hold on. Take protective measures .”
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