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Posts Tagged ‘Year of Volcanoes’

Kilauea Volcano Continues to Discharge Lava

Posted by feww on July 15, 2008

Kilauea Status Reports, Updates, and Information Releases

HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
Monday, July 14, 2008 07:48 HST (Monday, July 14, 2008 17:48 UTC)

KILAUEA VOLCANO (CAVW#1302-01-)
19.42°N 155.29°W, Summit Elevation 4091 ft (1247 m)
Volcano Alert Level: WATCH
Aviation Color Code: ORANGE


The lava fountain on shield 3 (12-15 m high). USGS

Activity Summary for last 24 hours: Kilauea summit and Pu`u `O`o cone continued to deflate. Unusually small amounts of ash and elevated amounts of sulfur dioxide gas continued to issue from the Halema`uma`u vent. At the east rift eruption site, incandescence was observed from vents within Pu`u `O`o Crater; lava flows from the TEB vent flows through tubes to ocean at Waikupanaha; surface flows within the abandoned Royal Gardens subdivision may have reached the coastal plain.

More …

Photograph by C. Heliker on September 19, 1984

Lava fountain 450 m high bursts from Pu`u `O`o in September 1984. In the foreground, low fountains play above a fissure that opened just before the main vent began to erupt. After the high fountains relieved some of the pressure on the magmatic system, the fissure activity died.

Summary of the Pu`u `O`o-Kupaianaha Eruption, 1983-present

The Pu`u `O`o-Kupaianaha eruption of Kilauea, now in its twenty-fourth year and 55th eruptive episode, ranks as the most voluminous outpouring of lava on the volcano’s east rift zone in the past five centuries. By January 2007, 3.1 cubic km of lava had covered 117 km2 and added 201 hectares to Kilauea’s southern shore. In the process, lava flows destroyed 189 structures and resurfaced 14 km of highway with as much as 35 m of lava.

Beginning in 1983, a series of short-lived lava fountains built the massive cinder-and-spatter cone of Pu`u` O`o. In 1986, the eruption migrated 3 km down the east rift zone to build a broad shield, Kupaianaha, which fed lava to the coast for the next 5.5 years.

When the eruption shifted back to Pu`u `O`o in 1992, flank-vent eruptions formed a shield banked against the west side of the cone. From 1992 to 2007, nearly continuous effusion from these vents has sent lava flows to the ocean, mainly inside the national park. Flank vent activity undermined the west and south sides of the cone, resulting in the collapse of the west flank in January 1997.

Since 1997, the eruption has continued from a series of flank vents on the west and south sides of the Pu`u `O`o cone. During this time the composite flow field has expanded westward, and tube-fed pahoehoe forms a plain that spans 15.6 km at the coast.


Puʻu ʻŌʻō ( pronounced roughly “poo-oo oh-oh”) is a cinder/spatter cone in the eastern rift zone of the Kīlauea volcano of the Hawaiian Islands. USGS.


Aerial view of lava lake in Pu‘u ‘O‘o crater. The crater is about 250 m in diameter. 30 August 1990. Credit: J.D. Griggs – USGS/HVO


1983-1986, The rise of Pu`u `O`o: episodic lava fountains build massive cone. USGS


Lava moves across the ground as a pahoehoe flow, Kilauea Volcano, Hawai`i – Photograph by J.D. Griggs on 13 November 1985 – USGS

Eruption_1954_Kilauea_Volcano
Hawaii Volcanoes National Park. May 1954 eruption of Kilauea Volcano. Halemaumau fountains. Photo by J.P. Eaton, May 31, 1954. USGS

This report on the status of Kilauea volcanic activity, in addition to maps, photos, and webcam images (available using the menu bar above), was prepared by the USGS Hawaiian Volcano Observatory (HVO). Hawai`i Volcanoes National Park status can be found at http://www.nps.gov/havo/ or 985-6000. Hawai`i County Viewing Area status can be found at http://www.lavainfo.us or 961-8093.

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Mt. Kurikoma Coughs, Still Comatose!

Posted by feww on June 18, 2008

The Year of Volcanoes, Too?

Steam, hot volcanic plumes rise near Mt. Kurikoma

Japan’s Self-Defense Forces personnel observed Monday hot volcanic plumes about seven kilometers southwest of the summit of Mt. Kurikoma, a 1,627-meter-high volcano located on the border of Miyagi, Iwate and Akita prefectures, Yomiuri Shimbun reported.

Aerial observation from a helicopter showed plumes rising from several spots near both Hanayama in Kurihara, and Yu no Hama hot-spring spa.

Sadato Ueki of Tohoku University’s Research Center for the Prediction of Earthquakes and Volcanic Eruptions said the plumes might be volcanic gases rising to the surface, or steam coming from underground hot water channels whose course was diverted by the powerful Mw 6.8 quake Saturday. The Iwate quake struck about 22km NW of the Mt. Kurikoma summit.

“There’s a possibility that volcanic gases that had been confined below ground are gushing out through fissures in the mountain created by the earthquake,” he said. However, he ruled out increased volcanic activity on Mt. Kurikoma, because the plumes were very far from the volcano’s summit.

Kurikoma volcano last erupted in 1950.

MT. KURIKOMA is a dormant stratovolcano stretching across three prefectures (states) of Miyagi, Iwate and Akita, standing high at an altitude of 1,627.7m.


Kurikoma volcano seen from the SSE with its summit at the right-center, the satellitic cone of Daichimori on the left, and Higashi-Kurikoma on the right. On the opposite side of the volcano, the summit is cut by a 4-km-wide caldera breached to the north that is partially filled by the Tsurugi-dake central cone, once mined for sulfur. (Caption: Source) Image Copyright: Shingo Takeuchi (Japanese Quaternary Volcanoes database, RIODB, http://www.aist.go.jp/RIODB/strata/VOL_JP/index.htm). See FEWW Fair Use Notice!

Coordinates: 38° 57′ 0″ N, 140° 46′ 48″ E
Decimal: 38.95°, 140.78°

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