This story is free to read because readers choose to support LAist. If you find value in independent local reporting, make a donation to power our newsroom today.
This archival content was originally written for and published on KPCC.org. Keep in mind that links and images may no longer work — and references may be outdated.
Seismologist explains connection between deep tremors, earthquakes
Listen
Seismologist explains connection between deep tremors, earthquakes
UC Berkeley seismologists have detected a series of mysterious tremors on a section of the San Andreas Fault. These unusual vibrations, typically connected to volcanoes, occur deep below the earth’s surface.
Seismologist Robert Nadeau of UC Berkeley explained to KPCC’s Larry Mantle how these vibrations happen.
Robert Nadeau: “Down below where the earthquakes are, the deformation doesn’t cause earthquakes, but we can see its generating these tremors. Below the top 10 miles it’s rather brittle and will break as earthquakes, but down below is more ductile – a little bit like silly putty; probably embedded with harder pieces of rock. And when the lower part moves these rocks start to crack and generate these tremors, these long duration rumblings.”
Nadeau said data collected from the underground tremors helps scientists better analyze earthquake activity along the fault.
You come to LAist because you want independent reporting and trustworthy local information. Our newsroom doesn’t answer to shareholders looking to turn a profit. Instead, we answer to you and our connected community. We are free to tell the full truth, to hold power to account without fear or favor, and to follow facts wherever they lead. Our only loyalty is to our audiences and our mission: to inform, engage, and strengthen our community.
Right now, LAist has lost $1.7M in annual funding due to Congress clawing back money already approved. The support we receive from readers like you will determine how fully our newsroom can continue informing, serving, and strengthening Southern California.
If this story helped you today, please become a monthly member today to help sustain this mission. It just takes 1 minute to donate below.
Your tax-deductible donation keeps LAist independent and accessible to everyone.
Right now, LAist has lost $1.7M in annual funding due to Congress clawing back money already approved. The support we receive from readers like you will determine how fully our newsroom can continue informing, serving, and strengthening Southern California.
If this story helped you today, please become a monthly member today to help sustain this mission. It just takes 1 minute to donate below.
Your tax-deductible donation keeps LAist independent and accessible to everyone.
Senior Vice President News, Editor in Chief
