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Geology Picture of the Week, July 22-28, 2007: Don't Look Back
Hawaii Volcano Observatory Eruption Update | July 23, 2007 | USGS

Posted on 07/27/2007 1:03:50 PM PDT by cogitator

Don't look back... there's a lava flow behind you. (Click for full size)

What's been happening: the lava lake in the Pu'u O'o crater drained, and a new fissure eruption began in an area where there hadn't been active lava since 1992. The man in the picture is standing in front of a "perched pond" -- an flat area, sometimes with rubble rims, where the lava in the flow pools before flowing further downslope. According to the daily update, it appears that the activity from the fissures may be declining.

Wild-guess prediction: we may be seeing the end stages of the Pu'u O'o eruption, which began in 1983. Or maybe not.

Here's a link to a map of the lava erupted by this eruption.

Lava flow map


TOPICS: Arts/Photography; Education; Science; Travel
KEYWORDS: hawaii; kilauea; lava; volcano
Referring to the map: on my first visit to Hawaii in the '80s, before this eruption started, I visited the famous black-sand beach of Kalapana. It's been obliterated by new lava.

Here's what it used to look like:

Here's the lava approaching the picnic area behind the beach:

And here's the lava destined to cover the beach. They clearly didn't need the lifeguard stand any more.

However, basalt erodes easily when pounded by surf; there are already new black sand beaches, and there will be more. It may take awhile to grow the palm trees again.

1 posted on 07/27/2007 1:03:57 PM PDT by cogitator
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To: 2Trievers; headsonpikes; Pokey78; Lil'freeper; epsjr; sauropod; Miss Marple; CPT Clay; ...

** ping **


2 posted on 07/27/2007 1:06:08 PM PDT by cogitator
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To: cogitator

Who’ll be responsible for the carbon credits?


3 posted on 07/27/2007 1:07:46 PM PDT by Young Werther ( and Julius Caesar said, "quae cum ita sunt." (or since these things are so!))
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To: cogitator
Wow! I love these postings.

Did you notice that you can almost feel the heat on your face?

4 posted on 07/27/2007 1:08:14 PM PDT by GingisK
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To: cogitator

I’ve been watching the webcam of that crater lately. There isn’t much to see right now due to steam, clouds and daylight but the night time view can be spectacular.

http://hvo.wr.usgs.gov/cam/index.htm


5 posted on 07/27/2007 1:19:28 PM PDT by cripplecreek (Greed is NOT a conservative ideal.)
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To: cogitator

Amazing pictures. Thanks for the ping. :o)


6 posted on 07/27/2007 1:24:35 PM PDT by NRA2BFree (THE TREE OF LIBERTY NEEDS TO BE WATERED FROM TIME TO TIME WITH THE BLOOD OF TYRANTS!!!)
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To: cogitator

My daughter and I were there - in ‘89. We wanted to see the green sand beach, but could not get there.


7 posted on 07/27/2007 2:48:43 PM PDT by mathluv (Never Forget!)
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To: mathluv
It's a lot more remote. I didn't try to get there, too far to drive from Hilo. Not bad from Kona.

Papakolea

And it's definitely green.


8 posted on 07/27/2007 3:54:56 PM PDT by cogitator
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