volcano: May 2009 Archives

I've just published all the panoramic photos, and they have been aligned (as best as is possible). Just go to the main menu and go to the panoramas page, and click on one of the thumbnails. This will display the photo comparison program which lets you fade from one year to another. You can also select different locations.

The red lines on the left and right edges mark North. I will make this more explicit in the descriptive text when I get back.

Not much other news: I've taken lots of photos for PhotoSynth, but it isn't practical to do process these until we're back (Microsoft in their wisdom wrote PhotoSynth so that it only processes when online).  Oh, and another big rock/lava fall on the north side of Arenal visible (and audible) from the cabins. Two in one week. Activity does seem to be swinging around to the north side.
We re-shot two of the panoramas this morning, and I've been working on data processing. Although there hasn't been any careful alignment with 2008's photos yet, we have two of of the 2009 panoramic photos up:

(the new panoramic photo view requires the Silverlight 2 plugin installing)

As you can see, the growth around Bird Point C is quite amazing. Look at the teak saplings in the distance, and the cabins (in 2008).

I should have all of the panoramic photos processed by tomorrow, and then I'll start aligning them. First impressions are that alignment is not as critical as I was fearing. (I am also starting to experiment with PhotoSynth - more news when I have something to show)

In other news, this has been quite an adventurous day but everyone else has covered that. The main message is that parents should not be worried!

(oh and there was a small explosion, well really a burp, from Arenal - unusual in that I was actually watching and saw it before the sound reached us)
Yes we arrived here safe and sound. I'm sure everyone else has filled you in on what we've been up to. It is amazing how much has grown in the last 12 months. It should show up well in the panoramic photos. We have a smaller group this year but we've been making lots of progress. Natalia and myself have completed most of the panoramic photos although they need some formatting. I have also just updated the map with Nick's ant trap locations (marked with insect icons - I need to update the key when I get back), and a modified location for one bird point which we had to move due to fence/path changes.

The weather has been co-operative. Lots of rain but it is typical rainy season weather, arriving mid-afternoon. So we have some clear mornings, like the photo below of Arenal that I took this morning from our cabin.

It is quite common for strong winds across a prominent peak (eg. a volcano) to form a "cap" cloud or lenticular cloud (similar but above it), as the air is forced up, condenses, and then sinks again. Here we have the 'cap', but the hot steam from Crater D is being carried down the west (right) side of the volcano in the downdraft. Then when the downdraft stops, buoyancy takes over and we get the convection cloud on the right. And this has two lenticular clouds of its own above it!  A photograph for the meteorologists, I think!


arenal_lenticular_downwind.jpg

We have also seen land slides (?active lava?) on the north east side for the first time - this was yesterday lunchtime in the grey area to the right. A large amount of rock fell and it almost reached the vegetation. This has become more common in the past year and many people think activity will switch to this side soon.

Darwin is Right!

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The entire Costa Rican experience is so amazing so far. It is impossible to summarize it all in one blog entry. Even though we either had no sleep or little sleep on Sunday, we all got here safe, encountering little to no problems.When we got here we travelled around a little visiting a few places - The Fortuna Park and the surrounding towns. We travelled through Monterey and arrived at Leaves and Lizards at about 6.00 pm, three of us having no idea the adventure that awaited us here. We all settled in comfortably and took an early night, even though sleeping was hard to do since we are all so excited. On Monday, every one got a lot of rough work and preparation for the rest of the week. It was amazing. Geovanni, Dr. Brown, and I discovered 56 species of birds and many of them were new from last year. On Monday as well, we hiked up Mount Arenal, the active volcanic mountain in the pouring rain. It was a refreshing experience. When we came down the Mountain, we watched it erupted. Mount Arenal is so magnificent. Tuesday was equally exciting. I discovered a Green Breasted Mango, a species of Hummingbird for my hummingbird study. Even though sitting in the scorching heat with many ants and bugs and dogs, it was well worth the experience. I learned a lot about the nesting habits of the Mango. One thing that was especially interesting about the Mango is not only it's territorial behavior when it is nesting but also the fact that the male Mango is the only parent that was observed so far incubating the young. We've seen so many new bird species from last year, including the Breasted Mango as well as nine plus species of hummingbirds and a few that can't come to mind right now. The rest of the experience is very refreshing and thrilling. Hiking through forests and encountering bugs, possible snakes and the RAINFALL is all an extremely wonderful experience. My Darwin experience - standing beneath this fully shaded tree and still getting wet from the rainfall. It is really intense. The Costa Rican food is amazing and some of the best I have had in a few months. Dr. Brown and Mr. Marsden have helped us so much and Steven and Debbie have been so hospitable to us as well as Madesia. Gotto go. Until next time, hasta la vista.

Volcan Arenal Status

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This time next week, we'll probably be hiking across an old lava flow in the shadow (and earshot) of Arenal, so time to check the status:

Here is last week's entry from the Smithsonian's volcano pages:


6 May-12 May 2009

OVSICORI-UNA reported that during April activity originating from Arenal's Crater C consisted of gas emissions, sporadic Strombolian eruptions, and occasional avalanches that traveled down the SW, S, and N flanks. Acid rain and small amounts of ejected pyroclastic material affected the NE and SE flanks. Small avalanches of volcanic material traveled down several ravines. Crater D showed only fumarolic activity.