Slashdot Mirror


Earthquake off Northern California

merger writes "A 7.0 earthquake (7.4 according to NOAA) occured off of the northern California coast occured at 7:50 p.m. PST triggering a tsunami warning (which was then downgraded to a tsunami bulletin). While searching Google News for information I learned about an earthquake preparedness study for the area which was just published today."

34 of 373 comments (clear)

  1. Anyone know how many hurt? by HG2 · · Score: 3, Funny

    Anyone?!?!?! I have family that live there... I am going to call them now.

    1. Re:Anyone know how many hurt? by krautcanman · · Score: 3, Interesting

      None. The earthquake was approx 80 miles offshore from Crescent City, about 300 miles NW of San Francisco. The Tsunami warning was retracted within an hour of the quake.

    2. Re:Anyone know how many hurt? by Anonymous Coward · · Score: 5, Funny

      Damn, even the earthquakes go offshore now.

  2. Re:Undersea Cables? by helioquake · · Score: 3, Funny

    Nah, probably someone spilled the bottle of beer on console and short-circuited it.

  3. East Bay Check In by obsol33t · · Score: 5, Informative

    Nothing felt here, most people will not even know about it until tomorrow in our area.

  4. This wasn't anything major. by FireballX301 · · Score: 4, Informative

    Link to CNN article.

    Plates shifted, relatively high richter scale, but keep in mind the Richter scale is *not* a linear scale. Nothing like the big tsunami a few months back.

    Hell, I live in San Diego, I felt a 5.6 a few days ago. Shook my bed a bit, that was more of an event than this.

    1. Re: This wasn't anything major. by Black+Parrot · · Score: 3, Funny


      > Shook my bed a bit, that was more of an event than this.

      Most slashdotters have never had their beds shaken, so you might want to explain what it's like.

      --
      Sheesh, evil *and* a jerk. -- Jade
  5. Tsunami info from a former park ranger by bjackrian · · Score: 5, Informative
    I worked as a Park Ranger at Redwood National Park a few years ago, and this is one of their nightmare scenarios. My housemate was a geology major, and the area right off of the coach is very susceptible to huge earthquakes (8.0+)--one happens every 200 or so years on average. The last one happened around 1700, so another one is fairly likely in the near future.

    Towns like Crescent City are at huge risk, and the city and state are trying to compensate with warning systems (that have been improved since the tsunami in the Indian Ocean). While some buildings have been constructed to withstand tsunamis (the national park headquarters was designed as a "flow through" building so tsunami waves will just break out the first floor windows and flow through the building), the best advice is to climb. Get to high ground as soon as you feel the earth shake. Don't wait for a tsunami warning--just climb!

    Also, don't go back to the ocean until you know for sure that it's safe to do so. Apparently, many of the deaths in the 1960s tsunami were a result of the mayor and several other people going down onto a pier to suvery the damage. Because tsunamis are really sets of high waves and sea levle changes, the next set of waves washed them away.

    One more interesting tidbit--most tsunami deaths aren't caused by the water itself. Instead, what happens is that the water crashes into buildings destroying them. Additional waves then take all of that debris and use it like battering rams to destroy more buildings. It's the debris that most often causes human deaths and damage in the city. Perhaps a good case for building more tsnuami-safe buildings?

  6. timely article by fearanddread · · Score: 4, Funny

    Interesting that this happened. Here is an article that was published just yesterday talking about exactly this topic. I guess the subduction zone reads the Chronicle.

  7. The Map didn't forcast it by tod_miller · · Score: 5, Informative

    http://pasadena.wr.usgs.gov/step/

    If you look now though, there are two areas of fairly high risk.

    Don't use this map for anything important, like planning picnics.

    Still, I check this every day, and I am suprised that I was given a reference to test its accuracy so soon.

    Still, it has updated today in light of the events.

    --
    #hostfile 0.0.0.0 primidi.com 0.0.0.0 www.primidi.com 0.0.0.0 radio.weblogs.com
  8. your family will be very appreciative by commodoresloat · · Score: 5, Funny

    that you had to post to slashdot before calling them to see if they were ok.

    1. Re:your family will be very appreciative by Anonymous Coward · · Score: 5, Funny

      You'd think just giving a shout upstairs would be enough anyway.

  9. Sarge is out?! Someone pinch me. by rice_burners_suck · · Score: 5, Funny

    The earthquake was caused by the impact of the news that Sarge is finally out. (It took several days before that news truly sank in.)

  10. False Alarm by amcox · · Score: 5, Informative

    According to a friend who is a geologist, the quake was on a slip fault, not a thrust falt, and therefore could not produce a tsunami. And, since it was something like 70 miles offshore, the shaking itself didn't do any real damage, either.

  11. Hollywood Check In by commodoresloat · · Score: 4, Funny
    Well it was pretty intense here. It felt like the whole world was shaking. There were all kinds of noises and objects flying around. Everything turned different colors too. And there were naked women everywhere....

    What's that? the quake was up north you say?

    That's it. No more LSD on weeknights.

  12. Re:Undersea Cables? by Forbman · · Score: 4, Insightful

    No, the amusement is in realizing that if the earthquake caused a break underwater, that it's not going to be fixed in ~2 hrs, thus indicating the cluelessness of the question pondered.

  13. Cowabunga! by chillmost · · Score: 3, Funny
    which was then downgraded to a tsunami bulletin

    Surf's Up, Dude!!

  14. We Really Aren't Prepared by Soloact · · Score: 3, Insightful

    This earthquake didn't really rattle us very much locally (Eureka CA area), but it triggered the tsunami warning from 2001 to 2113 PDT, and was fully lifted at 2155 PDT. The warning came via email to those of us who subscribe to the Tsunami Warning Center emails. However, the email wasn't sent out until about 10 minutes after the quake, and didn't set off the Emergency Broadcast System on the radio for about another 5 minutes after the emails. Folks, in 15 minutes, a Tsunami could have already happened locally. Even though the watch/warning was broadcast, most locals just shrugged it off, or didn't even hear about it until I mentioned it to them over an hour later. The local supermarket has been promoting Emergency Awareness lately, but in view of the reaction of the people, we really aren't prepared should the epicenter of a 7+ quake happen under our feet, or should a Tsunami actually hit. Fortunately, I live inland far enough and high enough to be above a wave line similar to that of the Indian Ocean tsunami of last December. But I don't live far enough away to not have to clean up bodies of non-prepared apathetic persons who become victims should one occur. I did live right on the beach, previously, and had an evacuation package and procedure ready. Others along the Coast were ready, but not enough of them. Everyone should really do a self-preparedness check to see if they are indeed ready for such an emergency. This includes those who live in earthquake, tornado, flooding, mountains (slides and fires), and hurricane areas. Prepare yourself and your neighbors today, should you have to help each other tomorrow.

  15. Japan by JanneM · · Score: 5, Interesting

    Here in Japan they have the very sensible system of reporting not only (and not even mostly) the energy released at the epicenter, but most prominently the expected effects at any area affected by the earthquake.

    They have a seven-point scale, with 1 being that you only just feel the quake if you are lying down or otherwise sensitive; to 7 being that nonhardened buildings collapse, and many expected injuries and deaths. Quake reports are usually in the form of maps with this info overlayed.

    For most of the public, that is the kind of info you want when an earthquake has occurred, rather than the intensity at the origin. It tells you much clearer if it's time to worry about friends and relatives or not.

    --
    Trust the Computer. The Computer is your friend.
  16. Re:Earthquake? Bah.... by 1u3hr · · Score: 4, Insightful
    Yeah, it always good to joke about events that can and do kill hundreds of thousands.

    Slashdotters seem to think so, as long is it doesn't affect Americans. every "foreign" disaster eleicts a bunch of ethnic/outsourcing (if in Asia or particularly India) jokes, all modded "Funny". Make similar jokes about American deaths and it's an instant flamebait/troll mod. He might get away with it here since no one seems to have died.

  17. Alaska Got Some Big Ones, Too by kingofalaska · · Score: 4, Informative
    I know many people think Alaska is off the coast of California, but I noticed we got a few large ones, too.

    " Aleutians rocked by series of big quakes

    The countless quakes started short after midnight. The biggest one, with a preliminary magnitude of 6.9, struck at 9:10 a.m. Tuesday. There were reports of items falling off shelves in Adak, about 175 miles from the epicenter.

    The series of quakes occurred where the Pacific and North American plates collide. Most were in the range of 4.5 and 5.7."

    Seems to be a relation.

    KoA

    Eagle crashes into living room of a Ketchikan home

  18. MJ! by Zork+the+Almighty · · Score: 5, Funny

    God is angry over the Michael Jackson verdict!

    --

    In Soviet America the banks rob you!
  19. South West UK check in by rjshields · · Score: 5, Funny

    Nothing felt here. Roger.

    --
    In this world nothing is certain but death, taxes and flawed car analogies.
  20. Re:Slashdot should not be my primary news source : by Ilgaz · · Score: 3, Funny

    Don't go panic tomorrow if you read a "new" tsunami warning here.

  21. Timing by vyrus128 · · Score: 4, Funny

    Slashdot's getting better at posting news while it's new... this one's only about 3 or 4 hours out of date. Meanwhile Fark, a comedy site, had the newsflash up while the tsunami warning was still in effect. I know where I'm going for my news...

  22. Re:Earthquake? Bah.... by cduffy · · Score: 3, Insightful

    Ya know, there do exist Americans who think that folks who get up in arms over jokes about (say) the Twin Towers are largely uptight assholes. Quite a few of us, actually (though I'd avoid such jokes were I visiting New York, just to avoid offending local sensibilities).

    Don't judge the group by the vocal (readily offended) minority. There are plenty of Americans who don't mind jokes about our own tragedies -- what better way to get it behind than with humor?

  23. earthquake/tsunami insurance? by JimBobJoe · · Score: 4, Interesting

    I used to joke that insurance companies didn't care about the very imminent geological dangers that face California, because, they reckon, once the big one hits, there won't be anyone left in California to make any claims.

    On the other hand, it's been pointed out to me, semi-recently, that most Californians do not have earthquake insurance.

    I dunno about you, but that, with the combination of homes which average $509k, is a source of worry for me. Any Californians able to comment on earthquake/tsunami insurance?

    1. Re:earthquake/tsunami insurance? by Bootard · · Score: 3, Interesting

      The best part of it is that the Hayward fault that runs under UC Berkeley is the most likely fault to be the source of the next major quake in N.Cal. While I was there(class of '03), seismologists estimated that there was a 30% chance the next big one in N.Cal would come from that fault, although I think that percentange may have been downgraded since. That fault runs right through the middle of the football stadium, so when they built it, they had to put in expansion joints in the stadium so that the stadium would be ok(the west side is moving north and the east side is moving south). If you go to the stadium and check it out, you'll see that the fault has caused the 2 halves of the stadium to shift probably 24 inches from each other. They also have to flatten out the turf every so often, because the fault causes the field to lose its flatness. If you go to the stadium towards the end of the season, you can usually see where the fault runs on the field. It's well worth checking out one day. Go Bears!

      --
      exceptio probat regulam in casibus non exceptis
  24. Re:Offtopic response to sig by Hognoxious · · Score: 3, Insightful
    Fact is, routine circumcision was instituted for a completely spurious reason, and one that most people would not now even consider desirable.
    I thought it was because, if you live in the desert[1], it's not easy to wash as often as you should.

    Oh and re not eating shellfish: we have fridges now, thanks.

    [1] Consider where the two main cocksnipping religions originated.

    --
    Confucius say, "Find worm in apple - bad. Find half a worm - worse."
  25. Re:Northern California Coast??? by vought · · Score: 3, Informative
    California, to my knowledge, has no Northern Coast. So watch out for them land-bound tsunamis or the terrorists have won.



    California has about 840 miles of coastline.

    You bet we've got a north (Oregon sorth to roughly the Golden Gate), central (Godlen Gate south to Santa Barbara) and south (Santa Barbara on down) coast. North, central, and southern sections represent the general north-south location of that west-facing coastline.


    While the coastline in southern california faces southwest and Los Angeles is east of Reno (the state is distinctly boomerang-shaped), most Californians think of the coast as a westerly-facing one.

  26. Backup links ... by Savage-Rabbit · · Score: 3, Interesting

    No, the amusement is in realizing that if the earthquake caused a break underwater, that it's not going to be fixed in ~2 hrs, thus indicating the cluelessness of the question pondered.

    Why? That underwater link that guy mentioned might still be broken, if was indeed broken they probably activated an auxiliary/backup link to route their traffic through and are still working on the severed cable. I rely on a connection via a series of undersea links that have been severed a few times over the last few years by anything from fishermen to mechanical diggers and underwater sand-mining operations. Over here it rarely takes the local telecom more than half an hour to start routing traffic through backup connections but then of course we don't get as quite as many earthquakes here as they do in California

    --
    Only to idiots, are orders laws.
    -- Henning von Tresckow
  27. Earthquakes can't be usefully predicted by jesterzog · · Score: 4, Interesting

    one happens every 200 or so years on average. The last one happened around 1700, so another one is fairly likely in the near future.

    This is just a small nit-pick with this assertion. Sorry for dragging it out as I have.

    I don't know where you're getting your information from, but I also have a good friend who's a geophysicist, and I know a lot of others in the Earth Sciences department next door to my own. (We have a lot of major earthquake-causing fault lines in New Zealand, and it's a popular place for geophysicists from around the world to hang out.) If someone knows more then I'd welcome a correction, but my understanding is that earthquakes are still almost entirely unpredictible with today's knowledge.

    We can look at the history of any site and calculate an average earthquake frequency, just as your site averages every 200 years. If you look a short time into the future, it'll probably remain an average of about 200 years.

    But in Earth science terms, a "short" time is millions of years. When the frame of reference is so large, attempting to predict events accurately to hundreds of years is hopeless. An historical average of a big quake every 200 years really doesn't tell us anything useful about the immediate future of a site in terms comparable with a human lifetime.

    I've heard people argue about how the stress is released after an earthquake and there's a relation. I think this is a very common misconception that seems intuitive, but doesn't really match the facts as we know. All the geophysicists I've spoken to have claimed that this is mostly fiction, though.

    The biggest problem with this approach is that there's no clear and accurate way to even estimate, let alone measure, how much stress there was in the first place. Most of what we can guess simply comes from analysing historical records, and accurate records often don't even exist beyond the past few hundred years, if even that. You might have thought that 7th magnitude quake was big and released a lot of stress, until an 8th magnitude quake suddenly releases ten times as much energy, with the earlier quake having made a negligible dent in its force.

    If you look historically at the quakes in your area, you'll probably see that they're not set at all evenly. Even if you've gone for 300 years without an earthquake, chances are it's about as likely that you'll get a big one tommorrow as it is that you'll get a big one 1000 years from now. Perhaps you'll get 3 or 4 big ones in the next 3 or 4 decades.

    This isn't to say that it's not worth preparing for, though. If you live on a fault, chances are that you'll at least get moderate earthquakes, and over a wide enough population, it's quite likely that some part of it will be hit every so often. (The media doesn't normally report about all of the places that didn't have earthquakes.) Good building standards and response strategies, for instance, are the reason that there may only be a few tens or hundreds of casualties in a well-off country, whereas it might be hundreds of thousands or millions of casualties for an equivalent quake in a third world country.

    1. Re:Earthquakes can't be usefully predicted by Somegeek · · Score: 4, Insightful
      This is just a small nit-pick with this assertion. Sorry for dragging it out as I have.
      The poster never asserted anything about predicting earthquakes based upon the average. The poster just stated that historical data shows a 200 year average, and from that data one could say that one was 'fairly likely in the near future'. That's the way averages work; we may not understand the reason behind the pattern, but if there is enough data to create a pattern, its reasonable to guess that the pattern will continue. Just because the geological time scale is huge doesn't mean that there can't be regular geological events that occur with a short frequency. For a specific example, look at the U.S. Geological Survey (USGS) test site in Parkfield, California:

      http://quake.wr.usgs.gov/research/parkfield/

      Historical data showed earthquakes occurring in 1857, 1881, 1901, 1922, 1934, and 1966. The pattern average showed an earthquake due by around 1993. The next significant earthquake did not happen until 2004, not exactly on time, but dead accurate compared to your time span of 'millions of years'.

      Regarding the advice from your friends; a scientist once told me 'Half of everything that scientists teach is wrong, and we don't know which half it is.' Much of current scientific theory is just that, someone's current theory. Take it with a grain of salt.

      until an 8th magnitude quake suddenly releases ten times as much energy,
      Nope. From the USGS again: "The total amount of energy released by the earthquake, however, goes up by a factor of 32."

      http://earthquake.usgs.gov/recenteqsww/glossary.ht m#magnitude

      --
      And as you tread the halls of sanity, You feel so glad to be, Unable to go beyond. I have a message, From another time..
  28. South Central UK check in by aug24 · · Score: 4, Funny

    Hi Roger!

    --
    You're only jealous cos the little penguins are talking to me.