At The Edge Of Oblivion

3 09 2008

Today I did another amazing thing. I suppose if I keep calling everything I do amazing people won’t know how to distinguish daily stuff from special stuff. Either that or you’ll all become geologists! My evil plan will finally come to fruition!

Ok, in all seriousness I did something incredible. So you know the vent in Halema`uma`u I keep writing about? Today I helped install a time-lapse camera where the red dot in this photo is located. Keep in mind that the dot is about the size of 3 adults standing right next to each other, and make sure you click to see the full view of the image.

We also walked all along the rim on either side of that dot to perform maintenance on the ash-catching stations we have set up. I was directly over the vent and it was thrilling.

Here you can see the initial setup phase with the monster sulfur dioxide plume in the background. That’s the tripod.

Here’s the conversation I had with the geologist in that photo just seconds after I snapped the pic.

Him: “Hey, do you hear those loud banging noises from the vent?”
Me: “Yeah! They’re so loud! It’s amazing.”
Him: “If you hear a particularly loud one, get ready to run.”
Me: “Oh, right. Rocks can be ejected.”
Him: “You do realize that we could die, right?”
Me: “Yep!”
Him: “Ok, can you hand me those pliers over there?”

Not your average conversation at the office, was it? Let’s just say I pondered my time on this mortal coil for a minute whilst gazing into the swirling maw of Hell.

Maybe I should take up modelling hard hats? Anyway, here’s the end product of our efforts:

In the foreground you can see the solar panel that is responsible for powering the camera. The grey case on the ground is the battery, and the camera is in the open case on the tripod. The camera case lid is shut once we’re done adjusting it. The reason we installed it is that the vent has been growing. The lip and side walls have been collapsing quite a bit lately, so that first picture in this post actually shows the vent even smaller than it is now.

The noises issuing from the vent were otherworldly. I now understand perfectly why ancient Greeks and Romans believed that Hephaestus or Vulcan, respectively, was hammering away inside of the volcanoes. It honestly sounds like someone is forging things in the traditional hammer-and-anvil way. The booms are loud, metallic, and frequent. Sometimes it sounds like metallic popcorn, and other times it sounds like the resonating, drawn out intonation of a gong. It’s not always noisy like this. In fact, everyone is remarking on how unusual the noises actually are. I feel privileged to have heard them.

For those who are curious, I threw several rocks into the vent. I stopped after it belched out a massive plume that immediately blew in our direction. Making Pele, the Hawaiian volcano goddess, angry while perched on the lip of the vent was not on my To Do List for today.

Also of note: Both my photography and my person are present on the official HVO website! Visit the Kilauea Eruption Update page on HVO’s site to take a look. August 28th is the magic date. Those of you keeping up with the blog will recognize some of the images! The Quicktime video from August 31 is definitely worth a watch, too.

It’s work time…field work, that is.

26 08 2008

It’s high time that I posted about the field work I’ve been doing lately. Before I became sick last week, I was out mapping the newest lava flows at Waikupanaha. Well, it was a gorgeous day and I did manage to snap a few pictures before the hospital called.

While hiking to where we were to begin our mapping, we heard and saw some lava bubble bursts to the left of the ocean entry plume. Unfortunately, a watched pot never boils and neither does a watched ocean entry. As soon as I pulled my camera out, the bursts stopped. Ah well, at least the ocean entry plume still looked good.

This is a view to the south, and you can see the pali (or cliff) at the right of the frame. The lava flows toward the ocean from very far up the pali, sometimes aboveground and mostly underground through lava tubes.

The way we map new lava breakouts is by putting handheld GPS units on Tracking mode and then walking along the boundaries of the fresh lava. It’s a good way to map, since you can set the GPS to record your position at intervals of three seconds. The level of accuracy is enough for our purposes. After all, the flow field changes fairly often.

Moving on to the field work I did on Friday (it wasn’t too strenuous, don’t worry)! We met up with a cultural resources guy from Pohakuloa Training Area, a massive area between Mauna Loa and Mauna Kea where the Army and Marines practice bombing and combat. The samples we needed to obtain were on the military’s land, so we have to go through the proper channels to collect them.

There’s a bit of archaeology in what we were doing there.

That is a pit dug by the ancient Hawaiians. No one is sure why they dug these pits, which happen to be about 9,000 feet up the slope of Mauna Loa. We collected samples of the displaced rocks to perform the same Chlorine-36 cosmogenic isotope dating that we did on Mauna Loa’s summit. The reddish lava flow that the pits are situated in is of unknown age, so we’re also going to date that as well. It should give us an idea of how long ago the Hawaiians made the pits.

I suppose it can’t hurt to throw in a picture of the other massive volcano on this island. If you can make out a small whitish blob in the left foreground, past the plants…that’s our truck. This might give some sense of how gentle this particular slope of Mauna Loa is. Trust me, they’re not all like that!

Tonight is my last night housesitting, so my internet access (and consequently posting) should pick up a bit this week.