Showing posts with label Science News. Show all posts
Showing posts with label Science News. Show all posts

wallpaper Not Telling.

I need to just stop reading press releases. Seriously. They either piss me off or disappoint me. This one does both:
New model for how Nevada gold deposits formed may help in gold exploration
So silly ol' me, I kind of assumed this might tell me something about a new model for Nevada (Carlin-type) gold deposits, and how this might help in exploration for such deposits. HA! Here's the closest it gets:
The team relates formation of the gold deposits to a change in plate tectonics and a major magma event about 40 million years ago. It is the most complete explanation for Carlin-type gold deposits to date.
So after reading what is, to be fair, not a bad summary of what Carlin-type deposits are- though redundant for me- the press release ends with that. Five minutes wasted. Sigh. This is my theory, which is mine, and it is, as follows, mine: Brontosauruses were narrow at the end, much, much thicker in the middle, and then thinner again at the other end.

Thanks, perfesser.

wallpaper No Biggie

There have been a few reports today, in OregonLive, KGW and KATU, about a series of small quakes at Mt. St Helens over the weekend.
There were 15 quakes, mostly in the magnitude 1 range, with a couple around magnitude 2.5 recorded by the Pacific Northwest Seismic Network. They were about two miles deep just northwest of the volcano.
Small swarms like this are not uncommon under any of the major Cascade peaks and the surrounding area. All three reports appear to be based on the same AP source, and all agree that this shouldn't be taken as a warning of any incipient St Helens activity. On the other hand, if you're in the vicinity of Yellowstone, you might want to hightail it out of there. In fact, I'd like to recommend that any geological activity, anywhere on the planet, should be taken to indicate that the terror threat at Yellowstone has risen from red to at least crimson, and very likely ultraviolet.

wallpaper I Slept Through the Big One

311 years ago today, a so-called "great earthquake" struck the coastal region of the United States Pacific Northwest. Here's my post from last year explaining some of the details of why we think we know this; I'm not going to rewrite it here. However, this year's anniversary is somewhat special for another reason: Oregon conducted its first "shakeout" to encourage preparedness for the inevitable next great quake at 10:15 this morning.

I slept through it.

Unfortunately, metaphorically speaking, so did public awareness. @GlacialTill pointed out earlier that many members of his geology department weren't even aware of it. I was aware of it, and its coincidence with the anniversary, but it was sort of a peripheral awareness, something to which I wasn't paying attention. As I mentioned to him, this is our first such event, so expectations shouldn't be too high. On the other hand, I see my own complacent attitude toward the exercise as cautionary and a little shaming: if a person who is pretty well informed and concerned about this issue is essentially ignoring the shakeout, how can he expect that the general public will catch on? As it turns out, slightly more than 1% of Oregonians are reporting their participation.

So in the spirit of trying to do better next time, here are some links, resources and commentary. The official homepage is here, and the graphic at the bottom claims "Over 37,000 participants." Of particular interest to me are the instructions for how to react at the onset and for the duration of a quake (and the page upon which these instructions are apparently based, with more detail and explanation).

Unfortunately, I think the biggest failure during this first attempt was the lack of media coverage. As I commented to GlacialTill, I remember quite a few cursory articles last fall when the drill was announced. I thought about writing up a post then, but decided to wait until it was closer with the assumption I would be reminded by news releases. I know I've seen at least one article on the event during the last week, but I can't find it now. An article from KVAL (which I do skim over) shows up in Google- though not my RSS- but the link goes to a generic search page with no results. There have been a few articles and press releases, but not in places where I might have seen them without an intentional search. For example, despite my general contempt for press releases, this one at Newswire is very well done, in my opinion. (Oregon State University source is apparently here, with some links I haven't followed yet.) This one, from Portland's Fox affiliate, is shallow and cursory, but at least it's something. A brief at Medford's News Tribune notes the event... in this morning's edition. This seems like a day late to me, at least, but again, it's something.

I don't want to point fingers here- I think it would be wrong-headed and counterproductive. Further, as I implied above, I do not hold myself unaccountable. Between one route and another, I estimate I get somewhat fewer than a thousand readers a day. This is certainly a situation where a trivial amount of effort on my own part could have- likely would have- made a significant and substantive difference. The Medford article claims that 24,000 participants were anticpated, so the actual number tallied thus far- which may increase- is better than 50% higher than expected.

Still.

I don't think Oregonians, Washingtonians and British Columbians have fully grasped the disruption we're talking about here. Roads, water, power, airports, hospitals, food distribution and all sorts of other physical and social infrastructure that we take for granted are likely to be knocked out for weeks, or, at the very best, functioning at very low levels of efficiency. Are you ready for that? Have you really thought about what that means?

It could strike in the next few minutes. It might not strike within the lifetimes of children born today. We don't know. To say it becomes more likely as time goes on, I think, would be misleading: seismologists and structural geologists are constantly reassessing their understandings of how stress and strain are relieved and distributed at any given moment and through time. For example, the recently discovered "slow quakes" of the PNW (that article is also a pretty good back-grounder) are still mostly mysterious. Do they concentrate strain and make a great quake more likely, or relieve strain and make one less likely? We don't know.

Given the unknowns, the potential consequences, and relatively low hassle and cost of being prepared, it seems obvious to me that being prepared is clearly preferable. As I said in last year's post, there is some good news here. I don't feel bleak about the situation. But I do feel we could be doing better.

As I looked back over the above to proofread for obvious errors, one sentence jumped out at me: "This is certainly a situation where a trivial amount of effort on my own part could have- likely would have- made a significant and substantive difference." I earnestly hope and pray you don't recall that sentence as you huddle in the rubble with your family, wondering when help will arrive.

Followup: Glacial Till, a geology student in Portland, and About.com Geology (Andrew Alden) have posted on The Shakeout as well. Both mention, as I forgot to, that British Columbia also conducted a shakeout. Glacial Till notes that the reported participation in BC is 460,000. Wikipedia says the population of that province is about 4.5 million, so that's a 10% participation rate, even though this is their first such event as well. C'mon, Oregon. We can do better. And Washington? You might want to come along next year.

Followup 2: I was half expecting this would get some after-the-fact coverage, despite there being effectively no coverage ahead of time. The Portland Tribune chimes in with the first such article I've seen, and I'll post any similar reports here as I come across them.

wallpaper Lotsa Water

I think Anne at Highly Allochthonous was the first to post this, along with some great discussion and explanatory hydrographs, but because RSS gives you the most recent articles first, I first saw it at KATU and OregonLive. The OL article has a more standard news perspective, if you're not into Anne's hydrogeological approach. KATU also has a story surveying tentative plans to restoring the wiped-out road, which no longer exists: the Sandy River is currently flowing where the road used to be. (Followup, 6:28- OregonLive also has a piece about reconstruction of the road, and an excellent aerial photo of the damage.)

Anne also mentions the February '96 floods, which I recall vividly. I was not out and about during those, though I did go downtown one afternoon to look at the water encroaching toward 2nd street, and it was not until mid-May when I found a field trip completely disrupted by washed out, debris-covered or severely damaged roads that I understood at a gut level how bad that set of floods had been. There are several areas in the Quartzville Creek drainage that I've been keeping a curious eye on for the last fifteen years, watching the recovery as plants have recolonized and various processes conspire to slowly hide the geological evidence of that mess.

As Anne correctly points out, last weekend's flood was not such a big deal- yes, it caused some local problems, and a number of people have lost possessions and homes, but no one was killed, and as far as I've seen no one was even hurt, though there may have been some discomfort when the power failed. As scary as the above footage is, in my mind, this was a good disaster: no casualties and awesome documentation. Another example of a good disaster was last year's volcanic eruption in Iceland. (No, I'm not going to look up, copy and paste its spelling.)

Other, much more seriously attention-deserving floods have occurred already in this young year, namely in Brazil and Australia. Today's Big Picture (The editor is moving on to another position, but says Boston.com's photo staff will continue the blog) showcases the Brazilian flooding and associated landslides/debris flows. And January 3rd, the same feature shared photos of the Australian floods. These two and other flood events (for example, "Sri Lanka, which suffered a 1-in-100 year flood this month.") are discussed in meteorological detail by Dr. Jeff Masters at his Wunderblog, who says
NOAA's Climate Prediction Center currently puts the La Niña event in the "strong" category, and whenever a La Niña or El Niño event reaches the strong category, major perturbations to global weather patterns occur. This typically results in record or near-record flooding in one or more regions of the globe.
Still, keep in mind some aren't sharing in this hydrologic wealth. An article that I would have read but probably not mentioned here, if not for the fortuitous context in which to place it, notes Prineville's water woes. Prineville is in the center part of Oregon, on the other side of the Cascades, and thus in their rain shadow. Trying to infer between the lines of this article, it sounds as if the problem is more about the groundwater geology and conserving scarce surface water resources rather than simply the dry climate, but the community is bumping up hard against the water limit, whatever the cause. "The reason the city is so interested in developing better wells is because, as it stands now, the city does not have the capacity to serve its existing residents, Klann said."

So yes, it has been a wet and mucky winter here in western Oregon, as was predicted when a La Nina developed in the second half of 2010. But overall, it could be a lot worse.

Followup: Heehee... just found this. Is it related enough? Sure, why not.
wallpaper Funny Pictures - Spell Evian backwardz wallpaper
see more Lolcats and funny pictures

wallpaper Sand Through the Hourglass: Bits of Geoscience

I'm feeling pretty uninspired. Between staying up too late reading (for several nights running) and what might be a mild cold- which may or may not be part and parcel with the weird, mild headaches that make me feel as if my skull is deforming like a kneaded lump of clay- I just want to go home and go to bed. But I have a backlog of interesting geology and earth science posts I've been meaning to get to, plus a couple more that came up today, so with a minimum of fuss here are some recent bits from the geoblogosphere and related news.
  • Silver Fox spent much of the weekend tracking down the original Dutton quote poetically describing Basin and Range as an army of caterpillars crawling north out of Mexico. Like Ron Schott, I'm most familiar with this from the sign at Dante's View in Death Valley, but this has clearly been misquoted many more times than quoted.
  • Callan has a slew of mashed-up rocks (what I personally think of as metacrappite, in my own mental categorization of rock groups, without the slightest bit of derogatory intent), in his continuing series on the geology of San Francisco. Also check out the mashed cherts; these are some of the hardest and most competent sedimentary rocks that exist, and to see them folded, spindled and mutilated like taffy should give you a profound respect for the power of the earth.
  • Christmas day's EPOD was a stereopair of a beautiful snowflake. I've been meaning to transform this into a wobble-gif, but haven't got to it. I may not. Like I said at the outset...
  • Cian at Point Source summarizes her highlights from the recent AGU conference. I'm intrigued by the emphasis I've seen, and not only in her post, on scientists taking a lead role in communicating on their disciplines. As I and numerous others have repeatedly noted, the journalists just aren't getting it done.
  • Evelyn at Georneys has a wonderful post about a wonderful map. As familiar as this beautiful bit of cartographic art is to me, I had never realized its importance, nor how recently (alright, okay, I get it, I'm old.) it had been completed. Heartfelt thanks for clarifying, Evelyn.
  • Bryan at Hot Topic summarizes a recent interview of James Hansen by Bill McKibben, highlighting the degree of confidence felt among climate scientists regarding global warming, its consequences, and how to ameliorate its effects.
  • NatGeo has a gallery of images of what are thought to be collapse pits over lava tubes... on Mars.
  • The Guardian has the most complete article I've seen on the reopening of Molycorp's Mountain Pass rare earths mine.
  • In a semi-related bit of economic news, Krugman's column today deals with rising commodity prices in a recovering economy, on a finite planet. As I've noted before, geology and economics are much more intimately related than I think most people recognize.
  • Also at The Guardian, an article that largely dismisses concerns over the recent news about Cr VI in US drinking water. He makes some valid points, and in my reading, I had already come to much the same conclusion- that the panicky reaction was overblown. However, I think the middle ground is more appropriate here. There's no reason to panic, but his level of dismissiveness is unwarranted as well. This should be of concern, and should be studied more carefully.
  • Louisiana will be coming to Oregon to study hurricane storm surges. Huh? Oregon State University has one of the largest wave tanks in the world: The Hinsdale Wave Research Laboratory.
  • The explosion and subsequent destruction of the Deepwater Horizon, and the ensuing oil spill, made the new chairman of The House Science and Technology Committee, Ralph Hall (R-Texas), feel all warm and fuzzy inside.
    "As we saw that thing bubbling out, blossoming out – all that energy, every minute of every hour of every day of every week – that was tremendous to me," he said. "That we could deliver that kind of energy out there – even on an explosion."
    You probably don't want to read that entire article if you would prefer to be optimistic regarding science in the US in the near future.

wallpaper Just Checked the Sky

wallpaper wallpaper

wallpaper Goings On In The Sky

wallpaper wallpaper I've been seeing solstice blessings going around, so I thought I'd check to make sure I knew when the moment was before I jumped in. According to Infoplease, "The precise moment of the 2010 solstice will be Dec. 21, 2010, 6:38 PM EST (23:38 UT)." So it's actually tomorrow afternoon, but close enough.

Of course the other thing to watch for tonight is the lunar eclipse. Nat Geo is making a fuss over the fact it is the first to fall on the day of the solstice in 372 years. OregonLive has a nice article that gets the details for those who want to watch:
North and Central America should be able to view the entire show, which is expected to last 3 1/2 hours if skies are clear. Total eclipse begins at 11:41 p.m. PST Monday or 2:41 a.m. EST Tuesday. The totality phase -- when the moon is entirely inside Earth's shadow -- will last a little over an hour.
Also, according to that article, OMSI is hosting a viewing party from 9:30 PM to 1:00 AM on the OMSI plaza. So if you're in the Portland area, I'm sure they'll have interpreters to help explain what you're seeing and why for the curious. And of course Bad Astronomer Phil Plait has a good write up, with a spectacular photo montage and a diagram showing how the phenomenon works.

However, a couple of days ago I remarked to someone that here on the west side of the Cascades, we are pretty much exempt from astronomy from the late fall to the early spring. About the only astronomical activity we could expect to witness (other than a slight brightening in the morning) is a catastrophic meteorite impact, and we're not scheduled for one of those anytime soon, so far as I've been informed. Which is fine by me. According to NOAA/NWS our forecast for tonight is "A 50 percent chance of showers. Mostly cloudy, with a low around 33." Cold and dreary... I'll step out a few times to see what I can see, but I won't be spending any major portion of the night outdoors. The clouds thin and break often enough that I'll probably get to see glimpses, but unlike the August 2007 lunar eclipse, this one isn't all that promising.