Category Archives: Volcanoes

Mauna Kea pu’us

Signs of old volcanic activity on Mauna Kea.

Another post on the WordPress photo challenge theme of ‘serene.’

To me this Mauna Kea scene, of an empty landscape in early evening light backed by pillow-like clouds, is quite serene. But is it really? Those fluffy clouds could contain the kind of turbulence that throws airplanes around, and the pu’us are evidence of volcanic eruptions in the past. Still, it does look serene.

Low clouds from Saddle Road

Low clouds blanket the lower slope of Mauna Kea.

Many times when I travel on Old Saddle Road, there comes a point where I’m exiting the clouds or disappearing into them. I like to take photos in this zone, experimenting as the level of the clouds comes and goes.

The top photo has that transition from clouds to clarity, but I also like the ethereal quality of the lower photo as patches of sun illuminate the pastures below.

Low clouds blanket the lower slope of Mauna Kea.

Kilauea Iki Crater trail

A group of people, looking very small, walk the trail across Kilauea Iki Craterfloor.A group of people, looking very small, walk the trail across Kilauea Iki Craterfloor.

These views of the trail across Kilauea Iki Crater, taken from the rim of the crater, give some idea of the scale of Kilauea Volcano.

Above, a group of people, looking very small, walk the trail across the crater floor.

To the left, smoke and gases from the active vent in Halema’uma’u Crater can be seen. Halema’uma’u Crater is part of the Kilauea Caldera which is much, much bigger than Kilauea Iki Crater. And, yes, that same group is still visible on the trail in this second photo, along with several others hiking the trail.

For more information about Hawaii Volcanoes National Park, go to nps.gov/havo/. For more information about Kilauea Volcano and it’s eruptions, go to hvo.wr.usgs.gov/kilauea/history/main.html.

Very Long Baseline Array on Mauna Kea

The very long baseline array on Mauna Kea is one of the ten radio telescopes that make up the Very Long Baseline Array (VLBA)Most of the telescopes on Mauna Kea are clustered together near the summit, but about halfway between the Mauna Kea Visitor Center and the summit is this lonely telescope. It’s one of the ten radio telescopes that make up the Very Long Baseline Array (VLBA), which began operating in 1993. Eight of the other telescopes are scattered around the U.S. mainland with the tenth at St. Croix in the Virgin Islands.

The Mauna Kea telescope, like the others, consists of a dish antenna 82 feet in diameter, and an unmanned control building. These ten telescopes are remotely operated from the Domenici Science Operations Center in Socorro, New Mexico.

For more information about the Very Long Baseline Array, go to https://public.lbo.us/.