17 July 2008
View into TEB and blankets of paper-thin limu o
Pele at Waikupanaha
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Left. The
top of the TEB collapsed in the past week,
permitting a view into the vent for the first
time in several weeks. Lava was rushing from
left to right, in this view, then turning
abruptly toward the top of the photo where it
enters the tube system.Right. Flows in
the past week expanded eastward and consumed
more of the Royal Gardens subdivision. One
house, at lower right, narrowly avoided
destruction, while two more structures, near the
burned trees in the center of the photo, were
buried completely.
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Left. The
Waikupanaha plume was more modest today,
illustrating the erratic behavior of the ocean
entry. Shortly after this photo was taken, large
explosions resumed and the plume grew again to
enormous size. Notice the thick haze in the
background. This the volcanic plume from Pu`u `O`o
out of site at upper right.Right. The
frequent littoral explosions at Waikupanaha have
blanketed the down-wind lava surface with
paper-thin limu o Pele fragments. Notice the
abrupt boundary between the brown limu o Pele
fallout and the shiny pahoehoe. Limu o Pele is
composed, basically, of pieces of bubble walls.
It forms when lava bubbles burst and when wind
blows laterally through sheets of molten lava
thrown up during the explosions.
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Besides the blanket
of limu of Pele described above, the large
explosions at Waikupanaha have also built a
littoral spatter cone in an arc around the ocean
entry. The cone is not obvious in the photo on
the left due to the oblique angle and shadowing
from the plume. In the infrared (IR) image on
the right, the portion of the littoral cone
built on the beach shows up nicely just below
image center. A small littoral explosion, hidden
by fume in the photo, is apparent just right of
image center in the IR image. The bright dots
scattered around on the littoral cone in the IR
image are hot blobs of recently-ejected spatter.
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