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Posts Tagged ‘volcano news’

Explosions at Two Indonesian Volcanoes Force Mass Evacuations

Posted by feww on June 7, 2015


Mt Sinabung and Mt Karangetang erupt, forcing thousands of evacuations

The volume of lava in Mt. Sinabung’s crater has increased to more than 3 million cubic meters and the volcano is in unstable condition, reported PVMBG.

Up to 3,000 residents living within a 7-km radius of Mt. Sinabung, to the south and southeast of the volcano, have been evacuated according to the Volcanology and Geological Disaster Mitigation Center (PVMBG).

Mt. Sinabung’s alert level was raised to the highest level “AWAS,” last week.

The volcano has been ejecting large plumes of volcanic matter since last week, and observers have reported pyroclastic flows cascading down the sides of the mountain.

The 2,460-m high volcano, created by the subduction of the Indo-Australian Plate under the Eurasian Plate, is located in the Karo plateau of Karo Regency, North Sumatra, about 40km from the Lake Toba supervolcano.

Sinabung has four volcanic craters, but only one of them is active currently.

Approximate location of Sinabung is marked  on the map by FEWW. Mount Sinabung is one of Indonesia’s 130  active volcanoes

Meantime, activity continues at Mt. Karangetang, which is located in the district of Sitaro, North Sulawesi, forcing the evacuation of 339 people (106 families).

The “twin-peaked” Mt Karangetang (“Api Siau”), also one of the most active volcanoes in Indonesia, is located on the north side of Siau Island [pop: 43,000] North Sulawesi, in the Celebes Sea.

About 200 million Indonesians, or more than thee-quarters of the population, live within 100-km radius of one or more volcanoes that have become restive at least once during the past 100 years, according to researchers.

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Chaparrastique Spews More Ash, Volcanic Gases

Posted by feww on December 31, 2013

Chaparrastique Volcano in Eastern El Salvador is Still Spewing Ash and Volcanic Gases

Up to 5,000 people live near the volcano, and the authorities have so far evacuated more than 1,600 to emergency shelters, but many have refused to leave their homes on the volcano slopes.

“The Chaparrastique volcano is still producing gases combined with small emissions of ash, which is normal after an eruption,” said  El Salvador’s environment ministry.

The 2,130-m high volcano,  El Salvador’s third highest, ejected columns of smoke and ash up to 5km above the summit on Sunday

Chaparrastique, aka San Miguel volcano, located about 15km SW of San Miguel city (population: 180,000), and about 140 km east of San Salvador, the capital, showed signs of increased activity on December 13.

The eruption has so far deposited more than 10cm of ash in the nearby areas within the coffee-producing region, according to reports.

chaparistique - Elsalvador-dotcom
Latest image of Chaparistique Eruption. Source:

ash from san migul eruption on coffee plants
 Chaparistique eruption deposits volcanic ash on coffee plants. Source:

El Salvador

El Salvador sits along the Pacific Ring of Fire, close to Middle America Trench, and is subject to significant tectonic movement, causing frequent earthquakes and volcanic activity. The tiny country (population: 6.3 million) is home to at least 23 volcanoes.

Middle America Trench

A major subduction zone known for many large earthquakes, the Middle America Trench is a 2,800-km long oceanic trench in the eastern Pacific Ocean, extending from central Mexico to Costa Rica. The trench is the boundary between five tectonic plates, including the Caribbean, Cocos (and Rivera), Nazca, the North American and the South American plates.

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22 Indonesian Volcanoes Remain on High Alerts

Posted by feww on November 16, 2013

5 Indonesian volcanoes remain on the 2nd highest state of alert, “orange,” 17 others on “yellow”

The alerts follow the latest eruption at Mt Sinabung, which saw the volcano ejecting ash to a height of about 7 km above the summit, forcing the authorities to evacuate about  5,600 people in several villages, according to Indonesia’s Center for Volcanology and Geological Disaster Mitigation (PVMBG).

Indonesian authorities have established a 3-km exclusion zone near the volcano following the Tuesday eruption for the second time in 9 days.

PVMBG had issued a “level three,” or “orange alert,” recommending villagers to stay out of the 3-km danger zone on November 3, 2013, followed by a 7-day state of emergency declared by the local authorities.

The explosive activity follows a series of most recent eruptions exhibited by the 2,460-meter high volcano that began in September 2013, leading to a significant eruption on October 24, which saw the volcano spewing smoke and ash to a height of about 3km above the crater summit, followed by other eruptions, especially the explosive eruption that occurred on Sunday, November 3.

Mt Sinabung is one of 130 or so active volcanoes in the Indonesian archipelago, whose 18,307 islands (922 of the islands are permanently inhabited) straddle the Pacific Ring of Fire (PRF).

PRF, aka the circum-Pacific seismic belt, is home to 452 volcanoes, or more than 75% of the world’s active and dormant volcanoes.

About 90% of the global seismicity and 82% of the largest quakes occur along PRF  [FIRE-EARTH data.]

mt sinabung
Mt Sinabung erupted explosively again on November 12, 2013 for a second time in 9 days. Image credit: CRIonLine via Xinhua. More images…

Mount Sinabung -ANTARA
Mount Sinabung spewing volcanic ashes as seen from Simpang Empat Village in Karo, North Sumatera (September 15, 2013). Credit:  ANTARA/Septianda Perdana.

Mt Sinabung erupted in August 2010 after 410 years of dormancy. The eruption claimed a dozen lives and displaced thousands of others. The eruption which occurred on August 29, 2010 was followed by a more powerful explosion the next day, and much stronger blast on September 7, 2010.

Sinabung spewed ash to a height of about 2km in its second eruption in two days on August 30, 2010.

Mount Sinabung volcano spews smoke in Suka Nalu village in the district of Tanah Karo, in Indonesia’s North Sumatra province August 30, 2010. The Indonesian volcano that erupted for the first time in centuries on Sunday spewed fresh plumes of smoke early on Monday morning, causing panic in nearby villages and delaying local flights, officials said on Monday.  Credit: Reuters/Tarmizy Harva. Image may be subject to copyright.  More photos …

Approximate location of Sinabung is marked  on the map by FEWW.
Mount Sinabung is one of Indonesia’s 130  active volcanoes

Sinabung Volcano: Summary of Details

Country: Indonesia
Region: Sumatra
Volcano Type: Stratovolcano
Volcano Status: Holocene
Last Known Eruption: Unknown [1600?]
Summit Elevation: 2,460
Latitude: 3.17°N
Longitude: 98.392°E
Source: GVP

Sinabung is located in Group K Volcanoes

Map of Volcanoes.
Background Map: University of Michigan. Designed and enhanced by Fire Earth Blog. Click image to enlarge.

The PVMBG categorizes Sinabung as a type A volcano, or those that have erupted since 1600. Type B volcanoes have not erupted since 1600 but show signs of activity, and type C are those that have not erupted in recorded history.

Mount Sinabung ejected tephra into the air as seen from Tanah Karo, North Sumatra, Indonesia, Friday, Sept. 3, 2010. (AP Photo/Dedy Zulkifli). Image may be subject to copyright.

Indonesian Volcanoes

Indonesian Volcanoes have been responsible for a number of cataclysmic explosions in modern history.

Krakatoa [Krakatau] Cataclysmic Eruption 1883

ashcroft -riv thames
William Ashcroft painting “On the Banks of the River Thames” in London, November 26, 1883 [Exactly three months after Krakatoa’s cataclysmic 1883 eruption.]

The Krakatoa eruption affected the climate driving the weather patterns wild for the next 5 years. Average global temperatures fell by about 1.2 °C in the following years, returning to normal only in 1888.

The eruption ejected about 21 cubic kilometers of volcanic matter and destroyed two-thirds of the Krakatoa island. The explosion also spawned giant tsunamis killing an estimated 40,000 people.

An 1888 lithograph of the 1883 violent explosion of Krakatau.

Based on their models, our colleagues at EDRO forecast that the collapse of Singapore may occur as a result of volcanic activity on the island of Sumatra. However, they have not disclosed any further detail.

Indonesia Volcano Alerts

PVMBG has placed five volcanoes on the second highest level of activity “Level III, Orange Alert,” and 17 others on  third highest alert level “Level II, Yellow Alert.” Following table shows the alert level designations, as of November 16, 2013.

indonesia volcano alerts 3nov13 -fire-earth-blog
Indonesia Volcano Alerts as of November 16, 2013. Source: PVMBG. Image enhanced by FIRE-EARTH Blog.

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