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Major Earthquake Fault Study Reveals How Earth Controls The Magnitude of Ruptures

Major Earthquake Fault Study Reveals How Earth Controls The Magnitude of Ruptures 21 APRIL 2021 There s more than 32 times as much energy in a magnitude 8 earthquake as there is in a magnitude 7 earthquake – and scientists have discovered a natural gate that controls which quakes are allowed to increase up to that highest scale.   The gate in question is at the Alpine Fault in New Zealand. A new analysis estimates that the fault has around a 75 percent chance of producing a damaging earthquake within the next 50 years or so. That s partly down to the earthquake gate that the research team has identified: a particular set of geological conditions that can stop a quake from growing. At the Alpine Fault, the next major earthquake has an 82 percent chance of passing through the gate and reaching a magnitude 8.

Study reveals workings of nature s own earthquake blocker

University of California - Riverside Sometimes, the “gate” stops earthquakes in the magnitude 7 range, while ones that pass through the gate grow to magnitude 8 or greater, releasing over 32 times as much energy as a magnitude 7. “An earthquake gate is like someone directing traffic at a one-lane construction zone. Sometimes you pull up and get a green ‘go’ sign, other times you have a red ‘stop’ sign until conditions change,” said UC Riverside geologist Nicolas Barth. Researchers learned about this gate while studying New Zealand’s Alpine Fault, which they determined has about a 75 percent chance of producing a damaging earthquake within the next 50 years. The modeling also suggests this next earthquake has an 82 percent chance of rupturing through the gate and being magnitude 8 or greater. These insights are now published in the journal Nature Geoscience.

Study finds 75% chance of major Alpine Fault earthquake in next 50 years

Study finds 75% chance of major Alpine Fault earthquake in next 50 years
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Study reveals the workings of nature s own earthquake blocker

Study reveals the workings of nature s own earthquake blocker
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75pc chance of major Alpine Fault quake in next 50 years - study

75pc chance of major Alpine Fault quake in next 50 years - study
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