Welcome to the Slashdot Beta site -- learn more here. Use the link in the footer or click here to return to the Classic version of Slashdot.

Thank you!

Before you choose to head back to the Classic look of the site, we'd appreciate it if you share your thoughts on the Beta; your feedback is what drives our ongoing development.

Beta is different and we value you taking the time to try it out. Please take a look at the changes we've made in Beta and  learn more about it. Thanks for reading, and for making the site better!

Tremors Predict California Earthquakes

michael posted more than 9 years ago | from the drop-off-into-the-ocean dept.

Science 24

johkir writes "A seismologist at the University of California Berkeley Seismological Laboratory has discovered mysterious tremors deep under the San Andreas Fault that may help predict future earthquakes. The episodes of tremors, which he calls chatter, last from four to twenty minutes and are being recorded from as deep as 40 kilometers beneath the surface -- up to four times the depth of normal earthquakes! These tremors also seem to occur a few weeks prior to detectable surface tremors. Article is published in Science Magazine, but you'll need a subscription, and it is covered in the San Francisco Chronicle and a UC Berkeley press release."

cancel ×


Sorry! There are no comments related to the filter you selected.

omg (-1, Troll)

babypen (838545) | more than 9 years ago | (#11053778)

GNAA Research: Was Jesus a NIGGER?
GNAA Research: Was Jesus a NIGGER?

Many people are surprised to discover that Christ was a black man, but when one looks at Christ's lineage one discovers that He has numerous Hamatic Ancestors, with Tamar, Rahab, Ruth, Naomi, Bathsheba and Jezabel being the most notable.

Here are the facts:

  • In ancient times, including Jesus' time, the Arabian peninsula was considered part of what we now call Africa, not "the Near East" or "the Middle East".
  • Christianity is frequently portrayed as "the White Man's religion". The truth is that most of the people in the Bible were people of color (i.e., not "Anglo"): Semitics, blacks, and Mediterranean, e.g., Romans.
  • In the United States today the general view on whether someone is "black" is the One-Drop Rule -- if a person has any black ancestors s/he is considered "black", even with a clearly Anglo skin color, e.g., Mariah Carry, Vanessa L. Williams, LaToya Jackson.
  • Jesus' male ancestors trace a line from Shem. However, ethnically and racially, they were mixed Semitic and Hamitic from the times spent in captivity in Egypt and Babylon. Rahab and probably Tamar were Canaanites. Although Canaanites spoke a Semitic language, they were descendants of Ham through his son Canaan. Bethsheba, who had been the wife of Uriah the Hittite, probably was a Hamitic (black) Hittite herself.

About GNAA Research

GNAA Research is a subsidiary of Gay Nigger Association of America, located in the United Kingdom. GNAA Research focuses on various controversial studies related to african-american and other racial issues.

About GNAA:
GNAA (GAY NIGGER ASSOCIATION OF AMERICA) is the first organization which gathers GAY NIGGERS from all over America and abroad for one common goal - being GAY NIGGERS.

Are you GAY [] ?
Are you a NIGGER [] ?
Are you a GAY NIGGER [] ?

If you answered "Yes" to all of the above questions, then GNAA (GAY NIGGER ASSOCIATION OF AMERICA) might be exactly what you've been looking for!
Join GNAA (GAY NIGGER ASSOCIATION OF AMERICA) today, and enjoy all the benefits of being a full-time GNAA member.
GNAA (GAY NIGGER ASSOCIATION OF AMERICA) is the fastest-growing GAY NIGGER community with THOUSANDS of members all over United States of America and the World! You, too, can be a part of GNAA if you join today!

Why not? It's quick and easy - only 3 simple steps!
  • First, you have to obtain a copy of GAYNIGGERS FROM OUTER SPACE THE MOVIE [] and watch it. You can download the movie [] (~130mb) using BitTorrent.
  • Second, you need to succeed in posting a GNAA First Post [] on [] , a popular "news for trolls" website.
  • Third, you need to join the official GNAA irc channel #GNAA on, and apply for membership.
Talk to one of the ops or any of the other members in the channel to sign up today! Upon submitting your application, you will be required to submit links to your successful First Post, and you will be tested on your knowledge of GAYNIGGERS FROM OUTER SPACE.

If you are having trouble locating #GNAA, the official GAY NIGGER ASSOCIATION OF AMERICA irc channel, you might be on a wrong irc network. The correct network is NiggerNET, and you can connect to as our official server. Follow this link [irc] if you are using an irc client such as mIRC.

If you have mod points and would like to support GNAA, please moderate this post up.

| ______________________________________._a,____ | Press contact:
| _______a_._______a_______aj#0s_____aWY!400.___ | Gary Niger
| __ad#7!!*P____a.d#0a____#!-_#0i___.#!__W#0#___ | [mailto]
| _j#'_.00#,___4#dP_"#,__j#,__0#Wi___*00P!_"#L,_ | GNAA Corporate Headquarters
| _"#ga#9!01___"#01__40,_"4Lj#!_4#g_________"01_ | 143 Rolloffle Avenue
| ________"#,___*@`__-N#____`___-!^_____________ | Tarzana, California 91356
| _________#1__________?________________________ |
| _________j1___________________________________ | All other inquiries:
| ____a,___jk_GAY_NIGGER_ASSOCIATION_OF_AMERICA_ | Enid Indian
| ____!4yaa#l___________________________________ | [mailto]
| ______-"!^____________________________________ | GNAA World Headquarters
` _______________________________________________' 160-0023 Japan Tokyo-to Shinjuku-ku Nishi-Shinjuku 3-20-2

Copyright (c) 2003-2004 Gay Nigger Association of America []

In Soviet Berkeley... (-1, Offtopic)

daeley (126313) | more than 9 years ago | (#11053818)

In Soviet Berkeley, tremors discover you.

First impression. (0)

Anonymous Coward | more than 9 years ago | (#11053880)

This seems quite Burtonesque.

UC Davis (5, Interesting)

eikonoklastes (530797) | more than 9 years ago | (#11053886)

Researchers at UC Davis have also recently made headlines trying to forecast earthquakes (Press release [] ). I wonder if we're on the brink of a new understanding of earth's geophysical processes.

We have a savior!!! (0, Funny)

Anonymous Coward | more than 9 years ago | (#11054008)

Quick, let's put Michael J. Fox in charge of earthquake prediction!

Re:We have a savior!!! (1)

NonSequor (230139) | more than 9 years ago | (#11058536)

He can consult with the Pope too.

Fingernails on Chalkboard? (0)

TFGeditor (737839) | more than 9 years ago | (#11054577)

Lessee, tectonic plates sliding over one another in a subduction zone... ...yeah, that would make a noise, I think.

Look at these guys (0)

Anonymous Coward | more than 9 years ago | (#11054638)

What a bunch of nerds [] !

Do you really trust these dorks to predict your earthquakes? C'mon, you got to put some polish on this research if you want it to sell, baby!

no evidence of volcanism huh? (1)

fearanddread (836731) | more than 9 years ago | (#11055289)

"We see this kind of tremor activity inside volcanoes like Mount St. Helens," Nadeau said, "but that's due to the movement of rising magma, and in the tremors we've recorded there's no evidence of volcanism and no seismic waves typical of ordinary earthquakes." []

tremors? (1)

flok (24996) | more than 9 years ago | (#11055379)

Tremors? []

When does California... (2, Funny)

OAB_X (818333) | more than 9 years ago | (#11056157)

Not have earthquake warnings? If you build your state on a major fault line, you deserve what you get. Sure its all warm and everything, but you can get that in Florida, only thet have hurricanes instead.

Moral of the story: Move from California to Toronto, no hurricanes/tornados/earthquakes. Just remember to buy a jacket before you leave home.

Re:When does California... (1)

TFGeditor (737839) | more than 9 years ago | (#11056663)

Why is parent modded down?

It's a joke, I say, it's a joke, son!

Re:When does California... (1)

superpulpsicle (533373) | more than 9 years ago | (#11063551)

Don't worry, California's one of those states where more people move out than move in every year. Eventually no one can afford to live in a state filled with overpriced real estate on top of a gigantic crack.

Re:When does California... (0)

Anonymous Coward | more than 9 years ago | (#11072045)

So you're trading off an earthquake for a cold, ugly, overpriced city, filled with unhappy, grumpy, materialistic people. I'd rather take my chances in an earthquake. All kidding aside, you would have been better off going to Vancouver.

Another false discovery, USA stealing credit again (3, Interesting)

GISGEOLOGYGEEK (708023) | more than 9 years ago | (#11059256)

This type of deep unusual tremor has been known of for several years.

Roughly every 14 months, such tremors occur deep under Vancouver Island. Over a 2 week period, the tremors shift southward towards washington state.

The tremors are related to the subduction of the pacific ocean under north america.

The san andreas fault is a remnant of the subduction zone, where the pacific spreading ridge has already been consumed. This ridge is still a couple hundred km offshore of vancouver island.

The deep tremors on the san andreas are probably caused by the change in strain on the system after the same tremors have occured up here. Yes, the deep tremor cycle did occur like clockwork, as predicted by the canadian pacific geoscience center a few months ago under vancouver island. Several 14 month cycles have been observed.

The weird thing about the tremors is that it represents a rebound in the subduction of the ocean plate. instead of subducting a few cm per year, in two weeks the subduction reverses by about 5cm, and then goes back to the normal.

It is thought that the changes in strain caused by all this may increase the short term chances of the next big quake hitting southwest BC by a large factor.

Anywho, go away, there's nothing truly new to see here, it may not have been observed so far south before, but it is not a discovery of a new type of geologic activity, the Canadians already documented it, which maybe the media would have realized had they bothered to look outside your borders for something other than the injustices of Iraq.

We now have proof. (1)

Eevee (535658) | more than 9 years ago | (#11063613)

Canadians don't read the articles either.

It states quite clearly in the Berkley press release:

...are similar to those discovered in the past two years at subduction zones in Japan and the Pacific Northwest.
Now why, you might ask, are they making a big deal out of this? It's because it's not happening on a subduction zone, but instead under a transform fault.

Re:We now have proof. (1)

GISGEOLOGYGEEK (708023) | more than 9 years ago | (#11064002)

how about you read closer yourself.

The san andreas is a remnant of the subduction of the pacific spreading ridge.

It didn't occur to you that there could still be a piece of the ocean plate descending at depth did it huh?

We now have further proof. (1)

Eevee (535658) | more than 9 years ago | (#11064264)

that Canadians don't read articles even after being called on it.

The san andreas is a remnant of the subduction of the pacific spreading ridge.

Okay, let's go to Plate Tectonics [] and Volcanoes and the San Andreas Fault [] for a quick lesson on the differences between subduction zones and transform faults.

It didn't occur to you that there could still be a piece of the ocean plate descending at depth did it huh?

Actually, it did occur to me. However, the article states this isn't at a subduction zone (45 degree slope) but rather at a transform fault (nearly vertical slope) and that the mechanism currently believed to cause the tremors in the subduction zones--fluids from seawater saturating the rocks--isn't present at the location. From the San Francisco Chronicle article:

In California, the most mystifying feature of the unexplained tremors is that they are occurring right on the deepest part of the San Andreas -- a fault that does not involve subduction or volcanic activity.

Furthermore, it should be noted that the activity at the Cascadia Subduction Zone isn't between the Pacific plate and the North American plate--the two plates involved in the San Andreas fault system--but rather between the Juan de Fuca plate and North American plate. So we can't just trace down the North American plate, assuming everything will be the same along it.

Re:Another false discovery, USA stealing credit ag (1)

OccidentalSlashy (809265) | more than 9 years ago | (#11064187)

The deep tremors on the san andreas are probably caused by the change in strain on the system after the same tremors have occured up here.

Actually, it was from millions of GFA gamers shooting up their prostitutes post coitus!

Re:Another false discovery, USA stealing credit ag (1)

OccidentalSlashy (809265) | more than 9 years ago | (#11064205)

which maybe the media would have realized had they bothered to look outside your borders for something other than the injustices of Iraq

Are you kidding me?!?! I WISH they would frikkin cover that...Rummy says they haven't been armoring our hummers because of physics...and the media doesn't care! They don't care about the war at ALL except to print some one-dimensional closeups of soldiers' faces.

Re:Another false discovery, USA stealing credit ag (1)

hicksw (716194) | more than 9 years ago | (#11065845)

Well, I know Canada is a BLUE state.

Is it time to invade Canada again?

Re:Another false discovery, USA stealing credit ag (0)

Anonymous Coward | more than 9 years ago | (#11067235)

Hot damn let's invade again. We'll bomb them back to the stone age-- revenge for 1812. Look at all the reasons:

- They are a left leaning state with the dangerous goal of providing universal health care
- They have nuclear technology
- They don't agree with US foreign policy
- They have scads of oil-- maybe more than anyone

Is it a coincidence that these tremors are being reported in Canada? After all wouldn't an earthquake generating device be the ultimate weapon of mass destruction? What do you think all that high grade B.C. pot funds?

We should invade and install a regime more friendly to US business and government interests. We'll get cheaper oil, cheaper prescription drugs and better pot. And Shania Twain in return for torturing us with Celine Dion for all these years.

Re:Another false discovery, USA stealing credit ag (1)

I Sil Zah (839784) | more than 9 years ago | (#11079895)

While yes similar tremors were reported in Canada, to my knowledge this is the first time that we've ever seen them on the San Andreas.

I grew up in the Bay Area and was there for the 89 quake. With the San Andreas, everytime scientists find something that correlates with detectable earthquakes, it doesn't pan out.

So the fact that the tremors were reported in Canada AND now they are being seen in San Andreas AND correlating to detectable earthquakes is very promising.

What most people, even people in the Bay Area (who really should pay more attention to the models) don't realize is that if a big earthquake hits, its the composition of the ground thats against us, especially in San Francisco.

We could have a really high fatality rate from just the quake let alone the aftermath, which is where most of the deaths were in 1909. Not to mention the fact that after 1909 city leaders were in such a rush to make it look like nothing happened that they lowered the building code instead of improving it, so it took a while before buildings were designed to hold up to an earthquake.

If you look at the journal that this was published in, it wasn't published by mass market media. It was published by the American Association for the Advancement of Science. It is unfair to say that the "media" should have looked outside of "our" country before documenting "something other than the injustices in Irag." Science is a peer reviewed journal which means that the actual scientists doing the research write an article about their research when its ready to be published and submit it to a journal. That journal then sends it to other knowledgable scientists in that field to review what the researchers wrote to make sure its valid and not off the deep end and they backed up their work. If everythings okay, it goes to press. So the "media" didn't write anything.

I can't see the article yet because its only online and I don't have access until its been printed. However, when my chemistry research got published all the relevent previous research was cited so I would bet that any similar tremors would be reported unless the Canadian tremors are actually different from these.

You are obviously an intelligent person, you know a lot about geological activity. I would suggest that you not be so quick to judge everyone based on the country at which they're from. If you had actually tried to look at the article, you would have seen that it was a scientific peer reviewed article in a respected journal.

Eh? (1)

dj245 (732906) | more than 9 years ago | (#11064788)

Tremors Predict California Earthquakes

A bad Tv series on the Scifi channel somehow predicts a major geological event?

Check for New Comments
Slashdot Login

Need an Account?

Forgot your password?

Submission Text Formatting Tips

We support a small subset of HTML, namely these tags:

  • b
  • i
  • p
  • br
  • a
  • ol
  • ul
  • li
  • dl
  • dt
  • dd
  • em
  • strong
  • tt
  • blockquote
  • div
  • quote
  • ecode

"ecode" can be used for code snippets, for example:

<ecode>    while(1) { do_something(); } </ecode>