Images

Undergraduate student Janelle Dyer (USGS ARRA student appointment) performs an ash leachate test on Redoubt ash in the Alaska Tephra Laboratory and Data Center in Anchorage, Alaska. This test is done to analyze the geochemical reaction between volcanic ash and drinking water sources during eruptions.

The terminus of the eastern branch of the one active flow above the pali. Pu`u `Ō `ō is at the top in the center with the TEB vent to the right.

Close-up of the front of the channelized 'a'ā flow on the western side of the TEB flow.

The terminus of the more vigorous western branch of the active flow on the western side of the TEB flow field near the top of the Royal Gardens subdivision.

Kīlauea's east rift zone eruption site. Pu`u `Ō `ō is to the right, and the TEB vent and upper tube system is to the left and behind Pu`u `Ō `ō.

Fume from the erupting vent in Halema`uma`u blankets the summit of Kīlauea in thick vog.

A vigorous spattering of the lava surface.

A vigorous spattering of the lava surface.

Much of the time the lava level was much lower, forming rapidly moving river of lava that cascaded into a deeper hole on the north side of the pit floor.

A vigorous spattering of the lava surface.

A vigorous spattering of the lava surface.

A vigorous spattering of the lava surface showing a small dome fountain formation.

With further draining, deep opening are exposed on the eastern side of the pit floor and the lava river pouring off into a deep hole on the north side of the pit.

A well developed lava whirpool migrating toward the north.

This ponded lava begins to drain away, forming a vortex on the lava surface. The curved streaks around the spattering point at the bottom of the image show where lava is beginning to move in a clockwise direction.

The ponded surface covered most of the bottom the collapse pit in the floor of Halema`uma`u, and was probably more than 100 m across.

View of Pu`u `Ō `ō and the TEB vent looking northwest. There is a distinctive separation between the two plumes coming from Pu`u `Ō `ō. The east wall vent is creating the plume closest to the east rim, and the larger plume is coming from a combination of several other vents inside the crater. The TEB vent is putting off the wispy plume in the foreground.

View of the inactive Waikupanaha lava delta. There has been no steam plume or lava ocean entry since the first weekend in January.

A particularly clear view reveals the walls of the collapse pit above the lava surface. The lava surface is roughly 200 meters (656 feet) below the floor of Halema`uma`u Crater, which is the smooth surface in the background.

Spectacular eruptive activity has been occurring deep within the collapse pit in Halema`uma`u Crater at Kīlauea's summit. At times, a river of lava poured into a deeper plunge pool of lava, which had a dome fountain on its right-hand side.

The bottom of the collapse pit is roughly 285 meters (935 feet) below the rim of Halema`uma`u, from which this photo was taken.