In which we get a mini update before I bury myself in silence again

So I'm really quite busy this fall trying to get a bunch of work done. Expect a more or less silent time until I have a life again in January... In the mean I will try to post a least some little snippets for entertainment.
Number one: The Science news cycle! Almost in line with my last post about the Alaskan underground fire...

In which we learn why I get upset with journalists sometimes

There was an article on CBC last week which really upset me. What they were talking about was - to put it midly - outrageous! The author(s) talk about an underground fire which has been burning for close to a year in the little town of Eagle, Alaska, close to the border to the Yukon. The headline says:

"Mysterious underground fire perplexes Alaska town

Possible volcano or shale gas fire has been burning for more than a year"

The whole thing is accompanied by this photograph:

Source: CBC.ca

For those of you who don't want to read the "whole" article, here's the one line synopsis: An underground fire has been burning approximately 40 km outside of Eagle since September last year. Now they go on speculating about the cause of the fire, and here's where I stumbled (after stumbling over the headline and subheader, of course...): 

"Aerial photos suggest a volcano forming but geologists say it's likely an underground shale gas fire."

Excuse me?? So geologists say it's a shale fire, but "aerial photos suggest a volcano"? Where did they get that statement? Sure, let's not believe the geologists who clearly have no idea what they're doing, let's get a random statement that has no scientific basis whatsoever. Or maybe it does and the authors just haven't provided enough background info? Sloppy journalism, either way. So I decided to investigate a bit more, see whether maybe that statement came from information that didn't make it into the article instead. After all I was really curious to see who decided that this a "possible volcano" (title...) forming here. I didn't even have to look far to discover that this sentence was even more ridiculous than I originally thought. There is a link to an interview with a local park ranger embedded next to the article. So I went and clicked on it, and sat through the entire 8 minute and 20 second interview by the CBC host with the park ranger. Sure enough, at 5:51 the host asks whether it is the oil shale that's burning, and the park ranger replies:

"It is. It is the oil shale that is burning"

So, uhm, there's somebody who has dealt with this thing for 11 months, probably done a lot of investigation, met with various groups of experts, surely we can just completely ignore her crystal clear statement and suggest that there is a VOLCANO FORMING??? And then in the end, when it turns out it isn't, maybe we can go ahead and sue the scientists for providing false information??? Granted, that's a bit of a stretch and I definitely don't want to get into this debate, but really CBC, I would have hoped you're just a tad less sensation-seeking and a tiny bit more on the credible journalism side. Apparently I was wrong... This is exactly the reason why many scientists really dislike talking to the media. Statements get turned and twisted and taken out of context just to potentially attract one more reader/viewer/listener. The public is mislead with information that is clearly wrong. It's so sad! Wouldn't it have been much nicer of the author to do his/her/their homework, go on the internet, and for example do a really quick search on where the volcanoes of this world are located: 

modified, original source: USGS

 All the red dots are volcanoes, and the black lines are plate boundaries. The white star shows where Eagle, Alaska, is. Yep, definitely doesn't look like there should be any volcanoes nearby. But who knows? But nope, there's also no signs of lava coming out of that fire. And yep, Eagle, Alaska, used to be home to miners in the area, it's a region rich in geological resources, so uhm, without even being an expert or something I would say a shale fire sounds pretty likely? But even if it really really is a volcano, how about giving a bit more background on where that info is coming from? Spending 5 more minutes (and I don't even get paid to do this, unlike some other people...) on this magic thing called "internet" I found this article on Alaska Dispatch. Much better researched, with lots of background info, it does what an article like this is supposed to do: It's catching, interesting, it educates the public about an interesting phenomenon and provides information relevant for locals about whether or not they ought to worry about the gases emitted by the fire. Seems almost like the CBC writer found the Alaska Dispatch article, decided to make life really simple, took the info out of context and wrote a short but potentially catching (ridiculous) blurp and called it a day... Just saying.  Again, I'm exaggerating, but I'm SO UPSET about this! Journalists out there, please take a second, talk to a scientist or somebody else who knows about the topic you're writing about, and then do not, I repeat, DO NOT ignore what they say but write a proper, well researched, educating and still entertaining piece of news. Sounds like a challenge? Well, maybe it's time to look for a different job then... Since there is one person who actually did that, let me take the time and end on a positive note: Great job, Ben Anderson at Alaska Dispatch!

Some other shaking...

I'm gonna take this "opportunity" to shift my focus for this post. Well in line with my blog title we're still talking about shaking, but this time it's not volcano-related. Instead, we're going back to one of my awesome previous homes: Wellington! You Wellingtonians out there will, of course, immediately know what I'm talking about. And those of you outside the coolest little capital in the world should have heard about it by now: Wellington is shaking A LOT!

It all started on Jul 21, when a magnitude 6.5 hit the city late in the afternoon. Centred in the Cook Strait at 13 km depth it thankfully did not result in any casualties or major damage. From GeoNet's shake map below we know that it must have felt most intense in the region around Blenheim, which is a bit closer to the epicentre (the point at the surface of the Earth that is closest to the source of the quake) than Wellington.

Source: GeoNet

The earthquake was followed by a bunch of aftershocks, which is normal after an event like this. According to the Gutenberg-Richter law for every earthquake of magnitude X in one region we expect roughly 10 earthquakes of magnitude X-1, 100 of magnitude X-2 and so on. In other words, and to make things a bit easier to understand,  say the Cook Strait earthquake was a magnitude 6, we expect 10 magnitude 5, 100 magnitude 4, 1000 magnitude 3 earthquakes following the main shock. This is what we call a mainshock-aftershock sequence. The timing of these aftershocks depends, but in general there is a lot of aftershocks in the first few hours and days, and they will become fewer and fewer over time. Here's an animation showing the first few hours of earthquake activity before and after the main shock.

Now if everything was perfectly simple we could stop right here. But things are slightly more complicated: There are also sequences of earthquakes where a bunch of smaller events lead up to a bigger one. The smaller ones are sometimes referred to as foreshocks, because they happen before a larger event. This is exactly what happened in the Italian town of L'Aquila in 2009, when a magnitude 6.3 struck after a few weeks of smaller earthquakes. There was a lot of media coverage on this tragic event and the trial that some of involved scientists had to go through, but to talk about this would be a new post. Instead I will sum up the essence: We can (and should!) advise people to act more cautious under certain circumstances. However, we cannot predict whether a larger earthquake will follow a sequence of smaller ones. There are probabilities for earthquake sequences to develop in one way or another. These probabilities are e.g. based on records of previous earthquake sequences for any given region. But again, how these probabilities should be communicated with the local people is not really that clear. There is a definite need for improvement! (see also my previous post about communication)

To get back on topic: Wellington. So why are there earthquakes in the first place? Well, the situation is again rather complicated. In New Zealand we're really lucky (or unlucky, from a non-geoscience perspective...): North and east of the North Island, the Pacific Plate in the East dives (or subducts) under the Australian Plate in the West. Southwest of the South Island, on the other hand, it's the other way round: The Australian Plate dives under the Pacific Plate. In between those two subduction zones, there is a large transform fault, which is called the "Alpine Fault". In this area, the two plates slide past each other sideways. Here is an image showing a transform fault:

Source: http://supercronopio.es.ucl.ac.uk/~crlb/

 How exactly does the transition from one to the other work? Nobody really knows... that's why people like me love New Zealand, it's like a natural laboratory with lots of things that are yet to be discovered! :) So in Wellington we're just north of the region where we go from subduction to sliding sideways. The Pacific Plate is sinking into the mantle, and we sit on the Australian Plate riding on top of that process. The Cook Strait earthquake, however, was in the sideways sliding zone, an area with lots of little transform faults that eventually all merge into the Alpine Fault in the South. Such an earthquake with side-by-side motion is called strike-slip earthquake. These earthquakes are (usually) not as strong as the subduction zone earthquakes. Examples for large subduction zone earthquakes would be the Japanese "Tohoku" earthquake in 2011, or the Sumatra-Andaman "Boxing Day" earthquake in 2004. Yet, strike-slip earthquakes can be quite damaging! A recent example for an earthquake that was partly strike-slip would be the 2011 Christchurch earthquake ("only" magnitude 6.3, but a lot of damage and many casualties!). Wellington was a bit luckier than Christchurch, partly because it was further away from the epicentre, partly because the event in Wellington was deeper (13 km vs. 5 km for Christchurch), and for a number of other potential reasons. 

But... this doesn't mean that Wellingtonians get to lean back and rest assured that nothing will ever happen to them! First of all, based on the aftershock law that I mentioned above, Wellington - just as Christchurch and any other place that has experienced large earthquakes - will continue to get aftershocks for the next year or more. Second, there is always the possibility of similarly large or even larger earthquakes following, on the same fault, or on other faults nearby. Third, there is still the subduction zone that wasn't too much involved with this particular event, so it's going to be quite interesting to see some studies on the probability of subduction earthquakes based on this most recent event. So, as harsh as it sounds, if you're a bit faint hearted or are simply looking for a quiet place to live then you might want to consider a place different from Wellington! Bear in mind though, a lot of places including my lovely current home Vancouver may also have a high chance of getting potentially large and destructive earthquakes. I strongly suggest that everyone living in places like this have an emergency kit packed and ready to go. The NZ campaign "Get ready - Get thru" has some good advice on what to put in such a kit, how to prepare for an earthquake, and how to act during and after. In Canada, the BC government for example provides similar information. Both websites also have a lot of info on other natural disaster that might happen in the area. To end - in all seriousness - a little line from Pineapple Express:

Well be careful, man. Be careful. Wear shoes in the house. Safety. Safety first, then teamwork.

 :)

Triple feature part III: Sakurajima (and some changes of plan...)

So turns out I was waaaay to busy to publish the last part of my triple feature before leaving for Japan. Also turns out the travel plan had to be changed a little bit (of course...). Instead of climbing Fuji, which probably would have been quite a rushed trip on a rainy day, I decided to go south to visit the beautiful island of Yakushima. More details on my non-volcano blog :)

But now the important thing: Sakurajima! This volcano gets an award for making the most volcanologists happy in 2013. Sitting on an island within Aira caldera in the South of Kyushu, Sakurajima erupts several times per year, and has been doing so since 1955! The perfect venue for the IAVCEI 2013 conference. Over 1,000 volcanologists gathered in the city of Kagoshima, roughly 4 km across the bay from the volcano. Whereas in June the volcano was sitting there rather quietly, she put on quite the show with sometimes multiple eruptions per day in July for the conference. I'm gonna let the pictures speak for themselves! Enjoy :)

Triple feature part II: Spotlight on Mt. Fuji

It's time for another volcano profile! This time our focus is the famous Mount Fuji, which even made the news a few days ago (see end of this post). It's really well known (type "Mount Fuji" into Google and it comes up with over 8 Mio. hits in 0.27 seconds...), mostly for its iconic shape - the shape that most people have in mind when they hear the word "volcano". This shape is characteristic for a type of volcano called "stratovolcano". These volcanoes are almost perfectly cone shaped, with relatively steep slopes.

Stratovolcanoes are made up of alternating layers of different types of volcanic materials, for example ash, lapilli (loose pieces of volcanic rock that are bigger than ash), bombs (even bigger pieces of volcanic rock), lava flows, pyroclastic flows (really hot, really fast, really deadly flows of loose volcanic material; see Harry Dalton in the very hilarious and awesome movie Dante's Peak for some insights on the topic... Here's the crucial scene:)

In most cases, stratovolcanoes are made out of very "sticky" rock types like rhyolite or andesite. With rocks it's essentially the same as with honey: There's the real runny stuff, that drips of your slice of toast no matter what, and then there's the type that's more viscous, so that even eating-habit-challenged people like me can finish their breakfast without letting hands and table and chair and pants and shirt enjoy their part of the honey. So the runny rock type (basalt) would form shield volcanoes, because all of the lava just runs down the mountain easily, whereas the sticky rock types actually produce volcanic output that can stick together and form a steeper mountain. Makes sense?

So Fuji-san sits on the island of Honshu, the biggest of all the parts of Japan. It's over 3,700 metres high, and I'm definitely planning on climbing at least part of it when I'm on my way back from Kagoshima to Tokyo in a bit over a month from now! I won't have to be too worried about activity there: The last "big" eruption was in 1707, with a VEI of 5 (see previous post for some info about VEI). Fuji's history in general is quite uncertain, there may have been some smaller eruptions in later in the 1700s and 1800s, but definitely nothing has happened in recent history. They're monitoring it tightly since it's so close to sooooo many people, but at this point there's not too much going on.

However, it did get quite interesting just a few days ago: On Saturday, the United Nations Educational, Scientific and Cultural Organization (UNESCO) announced that Mount Fuji is now officially a World Heritage site (read the full article). Only around 30 volcano-related sites have made it this far! Granted, it was probably given the status not based on it's volcano-y awesomeness but because it's a "sacred place and source of artistic inspiration", but hey, we can give it some credit anyways, don't you think?!

Triple feature part I: Spotlight on Aso Volcano

This post will be part of an exciting triple feature on Japanese volcanoes. Why Japanese volcanoes? Because I'm going to Japan! :) There is a conference coming up in July, and I am planning to spend some time afterwards to explore a bit of Japan's volcanoes. I hope I get a chance to visit Sakurajima, Aso and Fuji, all of three of which I'm going to feature here over the next few weeks!

Let's start with an old friend: Aso-san (The Japanese have the awesome tradition of politely addressing their volcanoes just like people). This is the volcano I studied for quite a while during my Master's. Aso Volcano is a large caldera on the island of Kyushu in southwestern Japan. Japan is really close to some major plate boundaries. For those who care: The Philippine Sea Plate is subducting under the Eurasian Plate at an angle, the Pacific Plate is also subducting, and the North American Plate is potentially stuck somewhere in between...... whew, it's really quite complicated! Because of all those plates pushing in different directions, Japan gets tons of earthquakes (as if we didn't know that by now...) and, of course, a bunch of active volcanism. So Aso Volcano sits somewhere behind one of the plate boundaries, and has been sitting there quite happily for more than 300,000 years. Quite happily? Well, it does get upset sometimes, and 4 of those volcanic "rants" have been pretty devastating to the island of Kyushu. Thankfully for the people there, the last big eruption was roughly 90,000 years ago. However, that doesn't mean that it is just quietly sitting there. Within the past 20 years alone there have been 11 "small" eruptions! (What does "small" mean? Click here for some info on what we call "Volcanic Explosivity Index", or VEI.) 

Those smaller eruptions, of course, don't make the whole caldera (something like 18 times 25 km) blow up. Instead, in the centre of the caldera there is a bunch of little peaks, called cones. One of those, Nakadake, is the one that's causing most of the trouble nowadays. It's around 1,600 m above sea level, and has a crater lake that apparently looks really cool! Now if there are only small eruptions, why would anybody care? Why did I spent months and months studying it?

Well, one reason why we should care is, of course, the fact that it looks really cool. At a relatively low elevation it's easily accessible (especially in comparison to some other volcanoes). There is a road leading up to the crater lake, and a cable car goes all the way up too! It's a big tourist attraction on the island of Kyushu. Of course one wouldn't want a volcano blow up in the face of some peaceful tourists, so the least we can do is monitor it. Then there is the oh-so-insignificant fact that the island of Kyushu alone is home to over 13 Mio. people!! You can imagine that none of those people would be very excited if the entire caldera decided to blow up at some point out of the blue (except for volcano-crazy people like me, they might get a little bit excited...). So there you have 13 Mio. and some more good reasons to monitor and study what the mighty Aso-san is up to.

There is an additional excitement factor at this volcano: Volcanoes with crater lakes often have what we call "phreatomagmatic" eruptions! These eruptions can be pretty dangerous if you're close by, even when only small amounts of magma come up to the surface. This is because of the water, of course! Have you ever made some pasta and forgot to turn the stove down once the water was boiling? When it flows over the top of your pot and onto the hot plate it usually starts sizzling and evaporates, i.e. gets so hot that it turns into steam and goes up in the air. If hot magma comes up through a volcano neck and finds a lake at the top of that neck, something very similar happens: The water in the lake gets heated up really really fast, and can suddenly turn into steam. But the steam needs much more space than the lake water that it used to be, so if the whole process happens fast enough then the water/steam/magma mixture will push away the surrounding rocks or whatever is in the way. It creates a really big explosion! If we're really unlucky, that mixture can then flow out of the crater and down the slopes of the volcano, taking with it anything that's in the way. These strong flows of water, rocks, and "stuff" are often called lahars. They can even wipe out bridges! (Read the story about the Tangiwai disaster in New Zealand, where a passenger train was wrecked when it crossed a bridge previously damaged by a lahar and collapsed with it on Christmas Eve, 1953)

This is really crazy stuff! And of course I'm very excited to check out the crime scene! Can't wait to see the crater lake after my conference in July!

PS: When I was in New Zealand I went to check out the way the lahar came down the slopes of Ruapehu and took out that train. It must have been so exciting and scary for anybody to witness!

Get off your couch and reach out!

In line with my previous post about communication, I think it's time to talk a bit about outreach. After all, I can't preach about something that I don't believe in, and it just happens that I have an "active interest" (what a great phrase...) in science education. There's a bunch of really good ways in Vancouver to get involved in science outreach activities. If you enjoy hanging out with kids, if you like explaining science-y things to non-experts, if you want to think about science outside of your little box, or if you've always loved the potato clock, there's a way to make yourself useful and do what you enjoy at the same time. 

There was a great episode on the Big Bang Theory recently (click here, for those of you in Canada): Sheldon and Leonard invite their childhood idol, Professor Proton (the host of a kids science TV show, who never pursued a science career and had to retire to doing shows at kids' birthday parties etc.) to their house. He appears and starts his show, only to stop half way through. He announces his disappointment in his life, emphasizes that he actually has a PhD, but was never again taken seriously after doing the TV show. Both Sheldon and Leonard try to cheer him up, and in the end it's Sheldon who turns the story around by telling Professor Proton how influential he was on Sheldon's (and probably hundreds of other kids') career choice(s). According to Sheldon, in a way Professor Proton is contributing to a big portion of science that is done by just those kids who back in the day loved his show.

Ok, it's just a TV show, and sometimes the way science is portrayed in this particular one isn't exactly epic, but really, they have a point here! We need good science educators and outreach activities as much as we need the science itself. Who's going to inspire kids and young people to pursue careers in science? It's their environment, whether it's through books, role models, TV shows, computer games, parents, or school trips and classroom activities. This is where everybody can come in! I can talk the most about things I've done myself (d'uh), so I'll give you guys a quick overview:

1) Let's Talk Science: A great outreach program that operates nationwide. The part that I particularly like is called a "Teacher Partnership". Grad students and other volunteers get paired up with a teacher, and go to that teacher's class for at least 3 times over the course of a school year. In the classroom, we deliver hands-on activities for the kids. Depending on their curriculum they can really be any kind of science, but I mostly do Earthscience stuff (surprise!). The age range varies, over the past couple of years I've taught grades 2-3 and it's tons of fun! 

2) At the Pacific Museum of Earth, the little Earthscience museum in our department, I lead tours and workshops for incoming groups of any age. From school classes to home schooled kids or ESL adults, anybody can learn about fossils, plate tectonics, rocks and more. And we recently bought an interactive 3D projection of the Earth, which is the most amazing toy I've seen in a long time!

3) Last but not least, I recently started being a mentor for a kid who's interested in volcanoes and earthquakes. This mentorship is one of many organized through the Vancouver School Board, and anybody with a special interest or area of expertise can volunteer to be a mentor. It's quite different from the mostly group-focused activities above, since it's obviously much more individualized, but definitely no less important!

I'm sure there are a lot more opportunities for outreach and education out there, and they're really all super fun and a good use of your time. So get off your couch and put yourself out there! You might even like it :)

PS: If anybody wants to discuss or has ideas for activities let me know!