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Originally posted by CLPrime
reply to post by tmiddlebrook36
Interesting...
GESS - Global Earthquake Satellite System
And here's a recent article (published 4 months ago) on the phenomenon of "triggered creep":
Triggered creep as a possible mechanism for delayed dynamic triggering of tremor and earthquakes
Westcoast, in light of your theory, I think we have ourselves quite a scenario.
Originally posted by SunnyDee
Why was this thread marked Hoax?
Has something been proven fake?
Does anyone remember reading that the big quake that is supposed to rock Cali would be centered in Valencia, Ca?
I know we had a small swarm of quakes there recently, and I downplayed it since I felt it, and it seemed like nothing unusual, but it is coming back to me that Valencia (the Newhall swarm is basically the same area-miles apart) was some scientificly predicted area that would crack Califorinia. OR I was dreaming this(don't want
to panic anybody here).edit on 6-9-2011 by SunnyDee because: (no reason given)
Earthquake science is poised to capitalize on a revolutionary capability for observing global crustal deformation. The concurrent improvements in seismic monitoring networks, high-performance computing, and geodetic measurement of crustal deformation have yielded significant advances in knowledge of fault behavior and crustal stress during the past decades.
In 2001, CWU researchers with the continuous GPS network Pacific Northwest Geodetic Array discovered periodic slow-slip across the Cascadia Subduction Zone. Previously undetected by seismic networks, these slip events exhibit regular recurrence intervals thus changing current understanding of earthquake behavior. Since this time, definitions for this newly discovered phenomenon have evolved. At first, the term "silent-earthquake" was employed to illustrate the absence of a seismic signature. Subsequent investigations and recent discoveries have led to a change in characterization. Now these slow-slip events are defined as eposodic tremor and slip (ETS).
Originally posted by CLPrime
reply to post by jadedANDcynical
And, so it's handy, here's my post,
Originally posted by CLPrime
reply to post by tmiddlebrook36
Interesting...
GESS - Global Earthquake Satellite System
And here's a recent article (published 4 months ago) on the phenomenon of "triggered creep":
Triggered creep as a possible mechanism for delayed dynamic triggering of tremor and earthquakes
Westcoast, in light of your theory, I think we have ourselves quite a scenario.
I'm impressed by the way the poster words their posts. The content, itself, seems designed to inspire just enough curiosity to keep people interested, but each new post seems more and more like someone who actually works with the information they're giving us.
I've been somewhat-silently watching from the sidelines, but I'm definitely intrigued.
Originally posted by westcoast
Yes, we are thinking the same thing. Which ofcourse is going to make me even more curious, as I have already formed my own opinions of an event in California based on things tie quite nicely into what this poster is saying.
Originally posted by CLPrime
Originally posted by westcoast
Yes, we are thinking the same thing. Which ofcourse is going to make me even more curious, as I have already formed my own opinions of an event in California based on things tie quite nicely into what this poster is saying.
In this case, I bet you hate the increasing possibility of being right.
There is some aseismic creep documented in parts of this segment. At its south end, the motion between the Pacific and North American plates shifts to a stairstep series of spreading centers and faults that runs down the Gulf of California. The southern segment has not ruptured since some time before 1700, and it is widely considered "overdue" for an earthquake of approximately magnitude 8.
The findings are linked to recent major events (over long distances) and current conditions.
The passage of radiating seismic waves generates transient stresses in the Earth’s crust that can trigger slip on faults far away from the original earthquake source
CRS Report for Congress
Earthquakes: Risk, Detection, Warning, and Research
Summary The United States faces the possibility of large economic losses from earthquake-damaged buildings and infrastructure. The Federal Emergency Management Agency has estimated that earthquakes cost the United States, on average, over $5 billion per year. California, Oregon, and Washington account for nearly $4.1 billion (77%) of the U.S. total estimated average annualized loss. California alone accounts for most of the estimated annualized earthquake losses for the nation.
According to a report released on April 14, 2008, California has a 99% chance of experiencing a magnitude 6.7 or larger earthquake in the next 30 years. 6 The likelihood of an even larger earthquake, magnitude 7.5 or greater, is 46%, and such an earthquake would likely occur in the southern part of the state. The fault with the highest probability of generating at least one earthquake of magnitude 6.7 or greater over the next 30 years is the San Andreas in southern California (59% probability); for northern California it is the Hayward-Rodgers Creek fault (31%). The earthquake forecasts are not predictions (i.e., they do not give a specific date or time), but represent probabilities over a given time period. In addition, the probabilities have variability associated with them. The earthquake forecasts are known as the “Uniform California Earthquake Rupture Forecast (UCERF)” and are produced by a working group composed of the USGS, the California Geological Survey, and the Southern California Earthquake Center.
MENLO PARK, Calif. — Researchers examining the San Andreas Fault in central California have found evidence that distant earthquakes can trigger episodes of accelerated (but still very slow) slip motion, deep on the fault.
While a sudden slip on a fault generates earthquakes capable of strong shaking, a fault can also slip slowly. Sometimes, these slow movements on a fault, known as creep events, are accompanied by a weak ground vibration known as a tectonic tremor, which can be detected on sensitive seismometers.
emphasis mine
The researchers also noted that creep events in other locations can sometimes trigger earthquakes. While they caution that their study was focused on triggered tremor rather than triggered earthquakes, they suggest that prolonged triggered creep episodes could be relevant for both phenomena. In particular, triggered creep episodes could provide a physical explanation for the time delay commonly observed between passing seismic waves and distantly generated earthquakes.
Published online this week in the journal, “Nature Geoscience,” the study, “Triggered creep as a possible mechanism for delayed dynamic triggering of tremor and earthquakes,” is the latest of ongoing research on the effects of large earthquakes on distant faults. While distantly triggered small earthquakes are relatively common, another recent study found no evidence for distantly triggered large earthquakes, at least during the first few days after a large event. The current study provides a possible mechanism to explain a range of time delays between a large distant event and triggered earthquakes.
Nature Geoscience 4, 384–388 (2011) doi:10.1038/ngeo1141
Received 08 October 2010 Accepted 28 March 2011 Published online 08 May 2011
I stress, timing is everything, and thus why there is no current public data. New information if pouring in daily, however we're moving in the wrong direction.
In late July, forty-four earthquake experts met at the University of Southern California’s Earthquake Center for two days to discuss forecasting methods.
“I was pretty skeptical going in and I remain skeptical,” said John Vidale, a professor of seismology at the University of Washington, who was among the forty-four experts from around the world invited to attend the meeting.
“I’ve been chasing this for a long time,” said Malcolm Johnston, a geophysicist with the U.S. Geological Survey, echoing Vidale’s sentiments. “If you think you can detect the start of an earthquake, it’s going to be very, very difficult.”
In contrast, researchers who are more optimistic about prediction techniques are exploring various theories that they believe can detect in advance when an earthquake will strike.
For instance, Dimitar Ouzounov, a physicist at Chapman University and a seismologist by training, is using satellite data to discern how changes in the atmosphere might relate to earthquakes. Meanwhile, Friedemann Freund, a researcher with NASA is investigating electric signals from rocks being squeezed.