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Ejected tephra from Halemaumau at Kīlauea Volcano, May 31, 1924...
May 31, 1924

Ejected tephra from Halemaumau at Kīlauea, May 31, 1925

This scene west of Halemaumau looks toward the rim of the caldera, southwest of Uēkahuna Bluff. New ballistic blocks and ash from the 1924 eruption coat the floor of the caldera.

Airplane landing field at Kīlauea Volcano strewn with blocks from s...
May 22, 1924

Airplane landing field at Kīlauea strewn with blocks from several e...

Prior to the eruption of 1924, this area was swept clean and used as a landing field for airplanes. This view looking toward the north rim of Halemaumau shows the air field littered with ballistic blocks from explosions in the 1924 eruption.

Explosion from Halemaumau at Kīlauea Volcano as viewed from Uēkahun...
May 18, 1924

Explosion from Halemaumau at Kīlauea May 18, 1924.

This was probably the strongest explosion of the eruption. Rocks and debris fell among spectators southeast of Halemaumau, causing one fatality. A torrential downpour and an electrical storm followed.

Spectators flee explosion from Halemaumau at Kīlauea Volcano, 1114 ...
May 18, 1924

Spectators flee explosion from Halemaumau at Kīlauea, May 18, 1925

Acting HVO director Ruy Finch snapped this photograph of spectators running away as large blocks were tossed about 600 meters (2000 feet) onto an airplane landing field. Lorrin A. Thurston provided this description: "About three minutes later with a sudden dull roar a column of inky black eruption cloud shot upward from the pit and great masses of gray ash rolled out from

Park superintendent Thomas Boles after a narrow escape at Kīlauea V...
May 14, 1924

Park superintendent Thomas Boles after a narrow escape at Kīlauea, ...

Boles poses on the grounds of the Volcano House hotel with the Halemaumau eruption plume in the background. He fell cutting his hands and a knee while fleeing an explosion the day before. After his close call the superintendent barred all public access within two miles of Halemaumau.

Explosion at Halemaumau as seen from Uēkahuna Bluff, at Kīlauea Vol...
May 13, 1924

Explosion at Halema‘uma‘u as seen from Uēkahuna Bluff, at Kīlauea, ...

Eight persons, including newspaper and movie men observing the scene at Halema‘uma‘u, were caught in a rain of hot rocks from this explosion. The rocks emitted hissing sounds as hot gas, mainly steam, escaped from them. Park superintendent Thomas Boles was knocked down twice by this bombardment.

Observer examines boulder ejected from Halemaumau, at Kīlauea Volca...
May 11, 1924

Boulder ejected from Halemaumau, at Kīlauea, May 11, 1925

On May 11, Ruy Finch and W.O. Clark visited Halemaumau and found a rock fragment weighing about 180 kg (400 pounds) that had been thrown 60 meters (200 feet) from the rim of the crater.

One of the first explosion clouds from Halemaumau, at Kīlauea Volca...
May 10, 1924

First explosion clouds from Halemaumau, Kīlauea 1925

Later scientists at the Observatory listed May 10 as the first day of the eruptive series. Between this date and May 27, they carefully recorded all explosions, ballistic falls, electric storms, and muddy rains as well as earthquakes felt and recorded on seismographs.

Scientists looking into the bright glow of Mauna Loa's 1942 eruptiv...
April 28, 1924

Scientists looking into bright glow of Mauna Loa's 1942 eruptive ve...

Scientists looking into the bright glow of Mauna Loa's 1942 eruptive vent. Eruption occurred during WWII and was not publicized to prevent Japanese war planes from navigating to the island at night.

Alaʻili Steaming Activity

[L1cam] - Alaʻili Steaming Activity

Live Panorama of Alaʻili Steaming Activity from Lilewa Crater [L1cam].

Children pose with 8 ton ballistic block at Kīlauea volcano, Hawai‘...

Children pose with 8 ton ballistic block at Kīlauea, Hawai‘i.

Some of the large ballistic blocks from the Kīlauea eruption of 1924 later became visitor attractions. Many of these blocks remain in place today as evidence of the forces unleashed at Kīlauea during the eruption of 1924.

Clear day view of PE cam

[PEcam] Puʻu ʻŌʻō East Flank from East of Puʻu ʻŌʻō

This image is from a temporary research camera positioned northeast of Puʻu ʻŌʻō, on Puʻu Halulu, looking southwest toward the northeast flank of Puʻu ʻŌʻō.


The webcams are operational 24/7 and faithfully record the dark of night if there are no sources of incandescence or other lights. Thermal webcams record heat rather than light

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May 3, 1996

Last week scientists at the U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) began their annual ground deformation surveys at the summit of Mauna Loa Volcano. Comprehensive monitoring of ground deformation and earthquake activity (seismicity) provides the most reliable criteria for forecasting volcanic eruptions.

Experiment helps show how calderas are created...
April 27, 1996

Visitors to Hawaii Volcanoes National Park are treated to spectacular views of Kīlauea caldera and Halema'uma'u pit crater from the many summit overlooks.

April 20, 1996

As summer is quickly approaching, it seems appropriate to write about the student worker and volunteer programs at the Hawaiian Volcano Observatory. 

New ocean entry for lava...
April 12, 1996

The latest development in Kīlauea's ongoing eruption is a new ocean entry near Lae`apuki inside Hawaii Volcanoes National Park.

April 5, 1996

When visitors to this island arrive at the Keahole airport and travel along the Queen Ka'ahumanu highway to a hotel in south Kohala, they cannot help but notice the bare, black, glistening fields of lava. The flows, with their glassy surfaces, appear to have erupted yesterday.

March 29, 1996

On Monday, April 1, 1996, scientists, historians, and public officials from Japan and the United States will convene in Hilo for a symposium to commemorate the 50th and 100th anniversaries of the disastrous tsunami earthquakes in the Aleutian Islands and in Sanriku, Japan, respectively.

March 22, 1996

On March 1, 1996, Dr. Margaret Thair Mangan succeeded David A. Clague as Scientist-in-Charge of the U.S. Geological Survey's Hawaiian Volcano Observatory and became the fifteenth person to lead this illustrious institution in its 84-year history.

Lava ccean entry and bench collapse...
March 15, 1996

The 13-year-old East Rift Zone eruption of Kīlauea Volcano has returned to the steady-state condition that existed prior to the dramatic eruptive surge on February 1st.

March 8, 1996

Monday, March 11, marks the anniversary of the last of a series of dramatic collapses at Kīlauea summit. On three occasions in February and March 1960 the floor of Halemaumau Crater broke apart and collapsed inward, raising a roiling black column of steam and rock dust 500 feet in the air. 

March 2, 1996

I will end my series of these columns with some thoughts about preparedness for future disasters and some personal thank-yous.

February 25, 1996

The "Volcano Watch" column first appeared on November 3, 1991. In the last four plus years, the staff and I have written 207 columns covering a wide range of topics, including updates on the ongoing eruption of Kīlauea, hazards posed by that eruption, long-term volcanic and seismic hazards in Hawaii, as well as descriptions of volcanic and seismic events worldwide.

Kīlauea eruption status after pause...
February 16, 1996

Kīlauea's 13-year-long eruption restarted on Valentine's day after a nine-day-long pause in activity. The renewed activity began about midnight on February 13 with changes in the ground vibrations recorded near the Pu'u 'O'o vent.