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Posts Tagged ‘Sakurajima’

FEWW Volcano Watch – 101301

Posted by feww on October 13, 2017

Shinmoedake volcano continues to erupt in Kyushu, Japan

The volcano’s latest round of activity began on October 11, after six years of dormancy. The volcano had previously erupted on September 7, 2011.

Shinmoedake on Kirishima mountain [Kirishimayama] on the island of Kyushu, Japan continues to eject plumes of smoke and ash to a height of about 1.7 km above the crater.

Ash fall was confirmed in four nearby cities and towns in Miyazaki prefecture after Thursday’s eruption.

Shinmoedake eruption on Oct 12, 2017 send a plume of whit smoke and ash to a height of about 1.7 km above the crater. Image: JMA/via Kyodo.

Japan Meteorological Agency has raised the eruption warning level from 2 to 3 ( on a scale of 1-5) after detecting inflation, which they have interpreted as increased probability of larger eruptions with pyroclastic flows occurring within the 2-kilomter radius from the crater.

Ongoing Activity at Sakurajima (Aira Caldera)

About two dozen events have been detected at Mt Sakurajima’s Showa Crater starting October 2. At least three of the events were explosive, exhaling plumes to heights of bout 1.6 km above the crater. An explosion ejected pyroclasts as far as 800m on October 5. Alert level remains at 3.

New Volcanic Activity (Global)

New volcanic activity have been reported at two volcanoes in Indonesia and one in Vanuatu:

  • Aoba (Ambae Island, Vanuatu)  Ash plumes rose to a height of 3.7 km a.s.l. on Oct 10. State of Emergency on the island has been extended for two weeks, through Oct 24. Some 11,000 residents were evacuated last month.

Indonesia

  • Mt. Agung (Bali)  An increase in seismic activity around the volcano forced the authorities to evacuate  about 124,000 people who lived around the volcano. The Indonesian National Board for Disaster Management declared a 12-kilometer exclusion zone around the volcano on September 24 after hundreds of volcanic earthquake rattled the volcano.
  • Lewotolo (Lomblen Island)  Around 800 people living near the volcano have been evacuated amid new activity. PVMBG has raised the alert level from 1 to 2 (on a scale of 1-4)

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Volcano Eruption Alert: Mt Sakurajima Ejects Large Plume of Ash

Posted by feww on April 1, 2016

Sakurajima ejects  impressive column of ash 5km into the air

The explosive eruption occurred Friday morning producing a large plume of smoke and ash.

Today’s eruption is reportedly the most powerful eruption in recent months.

Sakurajima (Kyushu, Japan)
Ontake crater
31°35′19″N,  130°39′17″E
Summit Elevation: 1,117 m
Minamidake crater
31°34′38″N, 130°39′32″E
Summit Elevation: 1,060 m

Authorities upgraded the volcanic warning to a “Level 3 (Do not approach the volcano)” on February 5.

One of the most active volcanoes in the world, Sakurajima is located in Kagoshima Bay, southern Kyushu, Japan (about 1,100km WSW of Tokyo). The composite volcano has three peaks: Kitadake, Nakadake and Minamidake (southern peak).

Since 1955 the Minamidake crater, has been continually active. The ongoing activity includes strong strombolian to ash explosions at least once and as many as 8 times a day.

Sendai nuclear power station was built about 50km from the volcano, and despite hundreds of recent eruptions, it was restarted on August 11, 2015.

Sakurajima is a post-caldera cone of the Aira caldera, a gigantic caldera in the southern portion of the island of Kyushu. The caldera was formed by a massive VEI 7 eruption (~ 400km³ of ejecta), about 22,000 years ago, “shortly” after the Oruanui eruption of New Zealand’s Taupo Volcano.

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Quakes Strike North and South of Sendai Nuclear Power Plant

Posted by feww on May 27, 2015

Earthquakes strike as Japan nuclear regulator clears two-reactor Sendai NPP

Two quakes struck about 55km south of Sendai NPP, USGS/EHP reported. A third quake  occurred [about 60km] north of the plant, according to Japan weather agency (JMA).

Japan’s nuclear regulators said Wednesday that Kyushu Electric Power Co’s that the two reactors at Sendai nuclear plant had cleared “safety hurdles,” according to reports.

Kyushu Electric company is planning to restart the Sendai No. 1 reactor in late July, and the No. 2 reactor in late September 2015 despite public opposition.

In April, a Kyushu court rejected a legal bid by residents to block the resumption of power generation at Sendai despite the potential threats posed by nearby volcanoes.

EQ Details

  • M4.8 quake strikes 10km ESE of Makurazaki, Japan 2015-05-27 at 01:51:25 UTC depth=150.2 km (USGS/EHP)
  • M4.5 quake 4km E of Makurazaki, Japan 2015-05-24 at 00:09:38 UTC depth=161.7 km (USGS/EHP)
  • M4.0 quake strikes Fukuoka pref. (33.0N, 130.5E) 27 May 2015-05-27 at 16:11 JST (UTC + 9 hrs.)  depth=10 km  (JMA)

Current Volcanic Alerts in the Region (JMA)

  • Kuchinoerabujima, Level 3 Alert (Do not approach the volcano), since 07 August 2014
  • Sakurajima,  Level 3 Alert ,  since 21 March 2012
  • Asosan,  Level 2 Alert (Do not approach the crater) since 30 August 2014
  • Kirishimayama (Shinmoedake),  Level 2 Alert,  since 22 October 2013
  • Suwanosejima, Level 2  Alert, since 01 December 2007
  • Kirishimayama,  volcano is potentially active, since 01 May 2015

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ANGRY Mt. Ontake Erupts in Central Japan

Posted by feww on September 27, 2014

VOLCANIC ERUPTION
ATMOSPHERIC ASH
MAIN SCENARIOS 707, 017, 08, 07
.

Volcanic eruptions can be far more devastating than atom bombs!

For now, deadly Ontake eruption traps more than 270 hikers, injuring dozens and burying 3 others under volcanic ash.

Ontake volcano (283040), the second highest volcano in Japan, which straddles the border between Nagano and Gifu prefectures, erupted late Saturday morning, spewing a thick plume of ash, smoke and volcanic matter up to a height of 3.5km.

Pyroclasts including small rocks ejected from the angry volcano have seriously injured at least 32 people, knocking more than a dozen of them unconscious, said local reports quoting officials at Kiso fire department in Nagano Prefecture.

Three climbers are missing believed to be buried under volcanic ash. “A 4th person who was buried under ash was later rescued but remains unconscious,” said the local TV news.

Deadly Eruption

[Updated at 14:40UTC] At least one person, a 38 year-old female, has been killed as a result of the eruption, said local reports.

More than 40 of the 271 hikers initially stranded, taking shelter at a cottage near the volcano summit, still remain on the mountain, including the injured who are waiting to be rescued.

The 3,067-meter tall volcano, located about 200km west of Tokyo, last erupted 7 years ago. A previous eruption in 1979 caused significant damage to crops in the nearby farms.

“It’s all white outside, looks like it has snowed. There is very bad visibility and we can’t see the top of the mountain,” a worker at a mountain hut for trekkers told Reuters.

“There are 15cm of ash on the ground,” she said.

“All we can do now is shut up the hut and then we are planning on coming down… This is a busy season because of the changing autumn leaves. It’s one of our busiest seasons.”

Authorities have warned that the eruption could eject pyroclasts as far as 4km from the caldera.

A thick plume of ash was still hanging over the volcano at dusk, TV footage showed.

“We expect a lot of injured people so we are now getting ready for their arrival,” said an official at Kiso Prefectural Hospital located near the mountain.

Meantime, the local meteorological agency upgraded its 5-stage volcanic alert for Ontake to “Orange”  or Level 3—Do not approach the volcano.

Sakurajima also Erupted Today

Meantime, Tokyo Volcanic Ash Advisory issue an eruption alert for SAKURAJIMA-WAKAMIKO (AIRA-CALDERA) 282080, earlier today.
The volcano erupted at 10:16UTC (2014/09/27) with the ash cloud climbing to FL070 and extending southwesterly.

Links to Latest Issues in Japan

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Sakurajima Erupts for 500th Time This Year

Posted by feww on August 18, 2013

Mount Sakurajima ejects a 5000-meter ash plume

Sakurajima volcano in southern Japan erupted Sunday afternoon spewing a  mushroom-shaped ash plume up to 5000 meters into the air, the highest plume ever recorded for the volcano.

sakurajima
Sakurajima volcano erupts in southern Japan’s Kyushu prefecture ejecting a five-kilometer high plume of ash, the highest volcanic plume ever recorded for the volcano. 
Photo: Kagoshima Local Meteorological Observatory/ via AP.

The 1117-m high volcano dumped a large amount of volcanic ash over Kagoshima city, located at the southwestern tip of the island of Kyushu, causing train delays and poor visibility on the roads.

The 50-minute eruption, the volcano’s 500th so far this year, was accompanied by a lava flow which traveled about 1,000 meters down the SE flank of the volcano.

Sakurajima was placed on “Level 3 Alert” (Do not approach the volcano) on 21 March 2012, according to Japan’s Meteorological Agency (JMA)

sakurajima dumps ash on kagoshima city
People used umbrellas and handkerchiefs to protect themselves against falling ash in Kagoshima city, Kagoshima Prefecture after Sakurajima eruption on Sunday August 18, 2013.  (Photo credit: Bunna Takizawa/ via Asahi Shimbun)

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Klyuchevskaya, Bezymianny and Sakurajima Erupt

Posted by feww on February 19, 2010

Satellite images of 3 erupting volcanoes


Sakurajima Volcano in southern Japan erupted more than 400 times during 2009, and activity was increasing in early 2010. The Advanced Land Imager (ALI) aboard NASA’s Earth Observing-1 (EO-1) satellite captured this natural-color image of the erupting volcano on February 15, 2010. Gray ash is visible in the plume that extends northeast (towards the lower-right) of the volcano. Ashfall is a regular occurrence at the daikon and mandarin farms surrounding the volcano, as well as in the nearby cities of Kagoshima and Kirishima. NASA Earth Observatory image and caption by Robert Simmon. Click image to enlarge.


Neighboring volcanoes on Russia’s Kamchatka Peninsula Klyuchevskaya Volcano in the north and Bezymianny Volcano in the south both erupted. The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite captured this false-color image on February 13, 2010. [But the image was released today, 6 days later.]  Reaching a height of 4,835 meters (15,860 feet), Klyuchevskaya (also Kliuchevskoi) Volcano is both the tallest and most active volcano on Kamchatka. Dwarfed by its neighbor, Bezymianny reaches 2,882 meters (9,455 feet) above sea level. It released a smaller, thinner plume than Klyuchevskaya.
NASA Earth Observatory image created by Jesse Allen. Caption by Michon Scott. Edited by FEWW. Click image to enlarge.

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