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Scientists have detected definitive movement around the San Andreas Fault system in California. Areas of land surrounding the fault have been shown to be rising and sinking, according to findings reported by the University of Hawaii. The study published in the journal Nature Geoscience found that parts of California surrounding the San Andreas Fault are symbiotically, if slowly, rising and sinking.
New assessment revealed the pattern
To tease out such motions, the team used a comprehensive statistical technique to extract from the GPS data a pattern of large-scale, smoothly varying vertical motions of the local crust. “While the San Andreas GPS data has been publicly available for more than a decade, the vertical component of the measurements had largely been ignored in tectonic investigations because of difficulties in interpreting the noisy data,” said Howell. “Using this technique, we were able to break down the noisy signals to isolate a simple vertical motion pattern that curiously straddled the San Andreas fault.”
Confirmation of predicted motion
The pattern resulting from their data analysis was similar in magnitude and direction to motions predicted by previously published earthquake cycle model results led by co-authors Bridget Smith-Konter, associate professor at SOEST, and David Sandwell, professor at SIO. “We were surprised and thrilled when this statistical method produced a coherent velocity field similar to the one predicted by our physical earthquake cycle models,” said Smith-Konter. “The powerful combination of a priori model predictions and a unique analysis of vertical GPS data led us to confirm that the buildup of century-long earthquake cycle forces within the crust are a dominant source of the observed vertical motion signal.”
originally posted by: caterpillage
They should send Nancy Pelosi and Diane Feinstein in to investigate more closely.
Seismic activity on the southern Cascadia Subduction fault may have triggered major earthquakes along the northern San Andreas Fault in California,
originally posted by: DBCowboy
a reply to: BO XIAN
If Cascadia hits, send flowers to my avatar. I live on the coast.
originally posted by: BO XIAN
a reply to: dreamingawake
Being an ignorant layman . . . and therefore able to think outside the dogmatic conventional box . . .
it seems quite logical to me that the Cascadia big quakes could influence the Northern San Andreas and vice versa.