States L2 Landing Page Tabs

Filter Total Items: 1,461
March 26, 2008

Dramatic Developments at Kilauea Volcano

Kilauea Volcano in Hawaii has experienced its first explosive eruption in more than 80 years and is now spewing noxious gas at 10 times the normal rate. John Eichelberger, head of the USGS Volcano Hazards Program, fills us in on the situation.

Ash-rich plume rising from Halema‘uma‘u Crater, Kīlauea Volcano 5 d...
March 24, 2008

Ash-rich plume rising from Halema‘uma‘u, Kīlauea 5 days after the f...

View of ash-rich plume rising from a new vent in Halema‘uma‘u Crater in Kīlauea Caldera 5 days after the first explosion from the vent occurred on March 19, 2008. The ash is turning the formerly white steam and gas plume a dusty-brown color. Note the ash fallout down-wind of the plume. Earlier in the day, geologists reported finding Pele's hair, Pele's tears, and spatter

March 19, 2008

10th anniversary of Kīlauea volcano's summit eruption

Today marks the 10th anniversary of the eruption within Halema‘uma‘u at the summit of Kīlauea Volcano. When the vent first opened on March 19, 2008, it formed a small pit about 115 feet (35 m) wide. Over the past decade, that pit (informally called the "Overlook crater") has grown into a gaping hole about 919 feet by 656 feet (280 x 200 m) in size. Click on the above

HVO technicians working on seismic station at summit of Kīlauea Vol...
February 18, 2008

HVO technicians working seismic station at summit of Kīlauea

HVO technicians install a solar-powered seismic station near the summit of Kīlauea Volcano to monitor earthquake activity. The seismic data is transmitted via radio signal directly to the observatory, where the data is initially analyzed by automatic computer programs and then examined in greater detail by a seismologist. Mauna Loa Volcano in background.

Image: Vog from Kilauea
January 31, 2008

Vog from Kilauea

The rim of Kīlauea Volcano’s summit caldera, normally clear on trade-wind days (left), became nearly obscured by vog (right) on some non-trade wind days beginning in 2008, when sulfur dioxide emissions from the volcano’s summit increased to unusually high levels. (This photo has been edited.)

January 26, 2008

TEB rootless shield flank failure

(January 26, 2008, 10:50:12 to 19:12:16) Perched lava ponds often formed atop the rootless shields built by the "Thanksgiving Eve Breakout" (TEB) lava flow. This movie shows the failure of the flank of a rootless shield on January 26, 2008, and the release of the lava contained within the perched lava pond at its summit. The inner wall of the perched lava pond come into

Image: Hawaiian Sunset
December 1, 2007

Hawaiian Sunset

Sunset over the ocean near Poipu, Kauai, Hawaii.

December 1, 2007

TEB effusion and partial rootless shield flank failure

(December 1, 2007, 02:01:38 to 16:01:36) On November 21, 2007—the eve of the U.S. Thanksgiving holiday—Episode 58 changed dramatically. Lava, erupting from Fissure D into a perched lava channel, found an easier path to the surface and broke out from directly over Fissure D on what was, by then, the southern flank of the channel. This switch in the eruption led to the

November 15, 2007

Episodic spattering in the Episode 58 lava channel

(November 15, 2007, 09:00:15 to 13:00:15) Periods of overflow and levee construction at the Episode 58 lava channel were interspersed with periods when the lava level was below the channel rim. The lava surface within the lava channel commonly experienced repeated cycles of rise and fall, as shown here. During these cycles, the lava surface would rise slowly, then

September 20, 2007

Dome fountain over Fissure D vent of the Episode 58 eruption

(September 20, 2007, 05:00:03 to 09:00:03) As the Episode 58 lava channel developed, the upper end of the channel crusted over so that lava—extruding from the erupting fissure—flowed through a short tube before entering the channel. A small surge of lava on September 20, 2007, exceeded the carrying capacity of this tube and resulted in a small dome fountain through the

September 8, 2007

Long-term evolution of the Episode 58 lava channel

(September 8 to November 30, 2007) Within days of the onset of Episode 58 on July 21, 2008, activity localized on the easternmost eruptive fissure—Fissure D—and channelized lava began flowing to the northeast. Repeated overflows from the channel added slowly to its height, and the channel became perched up to 45 meters above the pre-existing lava surface. The images that

Filter Total Items: 1,428
January 6, 1995

The first 12 years of eruptive activity.

December 30, 1994

This is roughly the 150th weekly column of "VolcanoWatch,"which was begun in November 1991 to keep readers informed of the on-going activity of Kīlauea Volcano.

Lava flowing from Kīlauea again...
December 16, 1994

Following a brief pause in the eruption during the last week of November, lava continues to issue from vents on the southwest flank of Pu'u 'O'o.

December 9, 1994

This past week, six members of the U.S. Geological Survey's Hawaiian Volcano Observatory traveled to San Francisco to participate in the Fall Meeting of the American Geophysical Union (AGU). 

December 2, 1994

The nearly 12-year-long eruption along Kīlauea's east rift zone took another brief vacation this past week. This was the sixth pause in eruptive activity this year, and the third since the beginning of October.

November 25, 1994

Mount Merapi, a 2,911-meter-tall volcano on the island of Java in Indonesia, erupted on November 22 at about 10:15 a.m. local time.

Location of selected earthquakes greater than magnitude 6, Island of Hawai‘i.
November 18, 1994

Eleven years ago on November 16, residents of Hawaii were awakened by a strong earthquake at 6:13 a.m. The earthquake had a magnitude of 6.6 and was located beneath the Kaoiki Fault Zone between the summits of Mauna Loa and Kīlauea Volcanoes. 

November 11, 1994

The eruption along Kīlauea's east rift zone is approaching its twelfth anniversary, now less than two months away. The eruption continues strongly, with magma replenishment beneath the summit roughly matching eruption rates.

November 4, 1994

Beginning on October 21 and continuing through October 31, residents in parts of lower Puna have felt a sequence of small earthquakes. 

October 28, 1994

The nearly twelve-year-long eruption on Kīlauea's east rift zone had at least one additional pause in activity this past week.

October 21, 1994

Not only does Hawaii move up and down, as I described last week, it also moves horizontally. There are several ways to measure these movements, and a new, exciting technique has recently been added to the repertoire.

October 14, 1994

There is abundant evidence that the island of Hawaii is sinking, and that different parts of the island sink, or subside, at different rates and for different reasons. At any location, the net subsidence is the sum of these different types of subsidence and any change in global sea level.