Fun with Gravity!

1 08 2008

Last Friday I helped one of my colleagues with a gravity survey of Kilauea. He’s measuring the gravity in several specific pre-determined areas around the volcano to determine if there’s a correlation between gravity changes and eruptions. Pretty cool. Behold, the Graviton EG!

This is a self-levelling electronic gravimeter. There are only a few of these in the world, so we’re renting this one from the University of Wisconsin. Yeah, I have no idea why they have one and the US Government doesn’t. Hmm. What’s going on up there, Wisconsin?

One of our stops was next to Kilauea Iki, a collapse crater off of Kilauea’s main caldera. In 1959 it erupted and formed a spectacular lava fountain between 180-240 feet high. Now you can walk across the remnants of the fiery lava lake. You can see the trail in the middle of this picture.

Here’s a picture of my gravimetry-loving Italian colleague. This picture has all sorts of cool stuff going on. Not only is he displaying the coveted USGS orange shirt, he’s also standing next to the Graviton, a USGS benchmark, our beast of a work truck, and you can see the plume from Kilauea’s current eruption behind the truck. Pretty freakin’ sweet. Also, notice the fine footwear on display. Hah. The gravity benchmarks are all near the road, so no hiking required. We generally wear industrial work boots.

Oh yeah, did I mention that I was driving? Yep. It’s a scientific fact that the bigger the truck, the more fun it is to drive…especially when you go off-road.

We ended the day by the Hilina Pali trailhead. I think the views speak for themselves.

Talk about a great end to the day. This is why geology is so much better than everything else. Hehe.

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2 responses

2 08 2008
melissa

The view looks spectacular. So glad you are having a great time, driving the truck, getting into the volcanos, taking great photos.

2 08 2008
Richard Brownfield

So were there any differences in the gravity around the volcano?

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