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Archive for the ‘volcanic unrest’ Category

Cotopaxi Volcano Stirs, Ash Eruptions Reported

Posted by feww on August 15, 2015

Ash from Ecuadorian volcano covers parts of Quito

Two small explosions at the giant Cotopaxi volcano ejected plumes of ash to a height of about 5km above the crater on Friday, reported Ecuador’s Geophysical Institute.

Volcanic ash from the eruptions covered southern parts of Quito, Ecuador’s capital and its second most populous city [metro pop: ~ 3.2 million, FIRE-EARTH Population Model.]

The events have been described as “very small explosions” that were “almost imperceptible,” by the officials, who insist the volcano, which has been showing signs of unrest since April, with a large increase in seismicity (including harmonic tremors) and SO2 emissions, is not necessarily about to erupt.

One of the world’s highest volcanoes, Cotopaxi is located about 50 km south of Quito, Ecuador. It is the second highest summit in the Andean country, reaching a height of about 5,900m. Some 90 or so eruption have been recorded since 1534.

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A Second Indonesian Volcano Erupts

Posted by feww on November 19, 2013

Mt Merapi eruption follows multiple explosions at Mt Sinabung

“Mount Merapi experienced a phreatic eruption. Its status remains normal due to a lack of activity,” said Yogyakarta’s Geological Disaster Technology Development and Research Agency (BPPTKG).

On November 16, 2013 FIRE-EARTH warned: 22 Indonesian Volcanoes Remain on High Alerts

Mt Merapi was placed on “Yellow Alert,” or “Level II” of the country’s 4-level alert system, on August 3, 2013.

Mt merapi
Latest Image of Mt Merapi. Credit: Badan Geologi.

“On Monday at 4:52 a.m. before the eruption, BPPTKG detected an earthquake in Ciamis, West Java, at a magnitude of 4.7 on the Richter scale. The tectonic quake is believed to have shaken the magma chamber of Mount Merapi causing it to release gas from below,” said BPPTKG spokesperson.

Merapi ejected volcanic materials about 2 kilometers into the air showering a 60-km radius area east of the volcano with ash, said the report.

The authorities have since imposed 1-kilometer exclusion zone around the volcano base.

The phreatic eruption on Monday was similar to one on July 22, said National Disaster Mitigation Agency (BNPB) spokesman. “But today’s was more powerful than the July 22 eruption.”

More than 600 families living in Kalitengah Lor, Kalitengah Kidul and Srune hamlets, in Glagaharjo village, Sleman regency, Yogyakarta, have been evacuated.

Hundreds of other villagers living on the western flank of Mount Merapi also fled their homes.

“The volcanic ash also affected residents in nearby towns. In Surakarta, Central Java, residents were shocked by the sight of volcanic ash covering streets, gardens and roofs. The ash rain continued until around 10 a.m. on Monday.” said the report.

“Surowedanan village in Boyolali, located around 17 km from the peak of Mount Merapi, was also covered by volcanic ash. ‘This morning, when I went out of the house at around 5 a.m., I saw ash everywhere,’ said Veronica Maria Sayektiana, of Surowedanan. According to Veronica, residents were wearing masks when they ventured out of their homes as the ash was still falling along with the drizzle.”

Merapi eruptions have killed hundreds of people in the past couple of decades.

Mount Merapi is one of the most active volcanoes in Indonesia. The 2010 its eruptions killed more than 300 people dead and forced about 400,000 people to evacuate their towns, while a 1930 eruption left at least 1,300 dead.

Mt Sinabung Update

The Indonesian ministry of transportation has diverted all flights to avoid routes near Mt Sinabung, located in Karo District, North Sumatra, which has erupted multiple times since last week.

The authorities say Mt Sinabung eruption on November 12 ejected  volcanic material that covered five districts destroying some 1,893 hectares of citrus plantations in Tanah Karo, which has impacted fruit production, said a report.

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.

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Posted in Global Disaster watch, global disasters, global disasters 2013, Significant Event Imagery, significant events, volcanic activity, Volcanic Activity Report, volcanic ash, volcanic earthquake, volcanic eruption, volcanic eruptions, volcanic event, volcanic unrest, volcanism report | Tagged: , , , , , , , | Leave a Comment »

How Many Volcanoes Firing?

Posted by feww on March 7, 2013

Global Volcanic Eruptions 2013: Tempo Rising?


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

Current Aviation Color Code: ORANGE

CLEVELAND VOLCANO (52°49’20” N 169°56’42” W; CAVW #1101-24-) – [Group A on the Global Map]
Wednesday, March 6, 2013 12:14 PM AKST (Wednesday, March 6, 2013 21:14 UTC)
Summit Elevation: 5676 ft (1,730 m)
Current Volcano Alert Level: WATCH
Source: AVO

1338849660_ak52
Cleveland viewed from an Alaska Airlines 737 en route to Adak, Alaska. [Carlisle Volcano, center of image. Mount Cleveland, lower right of image.]

Date: May 31, 2012 12:00 AM
Photographer/Creator: Read, Cyrus. Image courtesy of AVO/USGS.

1285607433_ak52
This GeoEye IKONOS image shows a faint plume issuing from Cleveland Volcano at 2:31 PM on September 14, 2010. Red in this image highlights areas of vegetation detected by the near-infrared channel
.

Date: September 14, 2010 10:31 PM UTC
Volcano(es): Cleveland
Photographer/Creator: Wessels, Rick
Image processed by AVO/USGS. Image copyright 2010 – GeoEye

KILAUEA VOLCANO (19°25’16” N 155°17’13” W; CAVW #1302-01-)
Wednesday, March 6, 2013 7:43 AM HST (Wednesday, March 6, 2013 17:43 UTC)
Summit Elevation 4091 ft (1,247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE
Source: HVO

Kamchatka Volcanoes on ORANGE Alert [Group J on the Global Map]

  • PLOSKY TOLBACHIK VOLCANO (55.83 N, 160.39 E; CAVW #1000-24-)
    Elevation:  3,085 m (10119 ft )
  • SHEVELUCH VOLCANO (56.64 N, 161.32 E; CAVW #1000-27-)
    Elevation: 3, 283 m [the dome elevation: 2,500 m)
  • KIZIMEN VOLCANO (55.13 N, 160.32 E; CAVW #1000-23-)
    Elevation: 2,485 m (8151 ft)
  • KARYMSKY VOLCANO (54.05 N, 159.44 E; CAVW #1000-13-)
    Elevation 1,486 m (4874 ft)

Other Kamchatka Volcanoes on YELLOW Alert [Group J on the Global Map]

  • KLYUCHEVSKOY VOLCANO (56.06 N, 160.64 E; CAVW #1000-26-)
    Elevation:  4,750 m
  • BEZYMIANNY VOLCANO (55.97 N, 160.6 E; CAVW #1000-25-)
    Elevation: 2,882 m
  • GORELY VOLCANO (52.56 N, 158.03 E; CAVW #1000-07-)
    Elevation: 1,828 m

Volcanoes of the Kurile Islands

  • Snow (Chirpoi Is.)  – YELLOW
  • Ivan Grozny – YELLOW

Recent Activity/ Unrest at other volcanoes

Ongoing Activity

Volcano/Earthquake Links

Posted in Significant Event Imagery, significant events, significant geophysical disturbances, volcanic activity, volcanic eruption, volcanic event, volcanic hazard, volcanic unrest, volcano, volcano alert, volcano images, Volcano News | Tagged: , , , , , , , , , , , , , , , | Leave a Comment »

3 Explosions Heard at Krakatau Volcano

Posted by feww on November 14, 2010

More Volcanic Unrest in Indonesia

Villagers flee after Krakatau explodes 3 times


Krakatau Erption in 2008. Credit: Thomas.Schiet. Click image to enlarge.

About 1,000 Villagers fled the area after three loud explosions were heard from Mount Anak Krakatau, reports say.

“We received information that the number of earthquakes increased to 933 on Friday. This is harmless as long as the villagers still stay at least two kilometers away,” Anto Pambudi, head of the team observing Mt. Anak Krakatau said.

The alert status for the volcano has now been raised to “caution.”


Mt Krakatau, Sinabung and Merapi Volcanoes Location Map
. Source of the original map: USGS. Map enhanced by Fire-Earth. Click image to enlarge.


Krakatau Islands Location Map. Original map enhanced by Fire-Earth.

island map
The Island Map (Simkin and Fiske, 1983). Image may be subject to copyright.

landsat PP1
Krakatau Image by Landsat Pathfinder Project (Dated May 18, 1992)

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 violent explosions [August 27, 1883]

Krakatoa is a volcanic island in the Sunda Strait located between Indonesian islands of Java and Sumatra. Both the volcano and island group share the same name.

Four enormous explosions almost entirely destroyed Krakatoa island on August 27, 1883. The violent explosions were reportedly heard in Perth, Western Australia,  some 3,500 km away. It was heard even on the island of Rodrigues near Mauritius, about 4,800 km away.

The shockwave from the last explosion, which ejected volcanic matter 80 km into the atmosphere, echoed around the planet seven times.

Karakatoa
An 1888 lithograph of the 1883 violent explosion of Krakatau.

The eruption ejected about 21 cubic kilometers of volcanic matter and completely destroyed two-thirds of the Krakatoa island.

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Latest Entries on Mt Merapi

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Posted in Indonesia volcanoes, Krakatau, Krakatau explosion, volcanic earthquake, Volcanic Explosions, volcanic unrest | Tagged: , , , | Leave a Comment »

VolcanoWatch Weekly [25 Nov 2009]

Posted by feww on November 26, 2009

VOW: to be announced…

SI / USGS Weekly Volcanic Activity Report
(18 November – 24 November 2009)

New activity/Unrest:

Volcano News (Source: GVP)

An explosive eruption from  detected by the seismic network on 20 November prompted INGEOMINAS to raise the Alert Level. Residents reported five explosions, sound waves, and incandescence from multiple areas in the crater.

During 18-24 November, HVO reported that lava flowed SE from beneath Kilauea’s Thanksgiving Eve Breakout (TEB) and rootless shield complex through a lava tube system, reaching the ocean. On 21 November, a sliver of the rim collapsed and was followed by an explosion that produced a dense brown plume that dissipated after a few minutes. Watch the video here. Source: GVP [Note: The video has .mov format and cannot be run on Windows Media Player.]

Ongoing Activity:

Batu Tara, Komba Island (Indonesia);  Chaitén, Southern Chile;  Karymsky, Eastern Kamchatka;  Kilauea, Hawaii;  Kliuchevskoi, Central Kamchatka (Russia); Pacaya, Guatemala;  Popocatépetl, México; Rabaul, New Britain; Reventador, Ecuador; Sakura-jima, Kyushu; Santa María, Guatemala; Shiveluch, Central Kamchatka (Russia); Soufrière Hills, Montserrat; Suwanose-jima, Ryukyu Islands (Japan)

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More Links:

FEWW Volcanic Activity Forecast

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Recent Posts on Chaitén:

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Soufriere Hills Volcano Vents Ash

Posted by feww on October 7, 2009

Image of the Day:  Soufriere Hills undergoes three vigorous ‘ash venting’ episodes

Soufriere Hills Volcano
Soufriere Hills Volcano has remained at an increased activity level, after undergoing three vigorous ‘ash venting’ events, with the third event lasting 10 minutes, at 10:00am local time on October 5, 2009. Photo: Montserrat Volcano Observatory. Image may be subject to copyright.

MVO reported a small swarm of VT earthquakes, followed by “a period of tremor associated with vigorous ash venting” that resulted in large ash plumes drifting WNW over the island and out to sea. “Only a very light dusting of ash fell in Old Towne and Olveston as the plumes moved to the south of the inhabited areas.”

MVO observed no explosive activity or pyroclastic flows associated with the ash venting, which ceased at about 12:00am local time. “Two rockfall signals followed the vigorous ash venting,” followed by continual ash venting, however, no further seismicity occurred.

montserrat_tmo_2009279
After 10 months of relative quiet, Soufriere Hills volcano on the Caribbean island of Montserrat blasted ash into the sky in early October 2009. This natural-color satellite image shows a plume of ash extending westward from Soufriere Hills on October 6, 2009, a day after eruptive activity resumed on October 5th. A pilot reported ash extending 280 kilometers (170 miles) at an elevation of approximately 3,600 meters (12,000 feet).
In 1995, a series of major eruptions forced the evacuation of the Montserrat’s former capital city, Plymouth. NASA image by Jeff Schmaltz, MODIS Rapid Response, NASA Goddard Space Flight Center. The Rapid Response Team provides twice-daily images of this region. Caption by Robert Simmon. [Edited by FEWW]

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Posted in Caribbean islands, island of Montserrat, Montserrat, Plymouth, stratovolcano, volcanic activity, volcanic unrest, volcanism | Tagged: , , , , , , | 2 Comments »

Nyiragongo Unrest

Posted by feww on July 25, 2009

Plume from Nyiragongo

nyiragongo_ali_2009178
Nyiragongo Volcano in the Democratic Republic of the Congo released a small plume on June 27, 2009, as the Advanced Land Imager (ALI) on NASA’s Earth Observing-1 (EO-1) satellite passed overhead.

NASA’s Moderate Resolution Imaging Spectroradiometer (MODIS) sensors detected hotspots on six different occasions between April 10 and May 4, 2009.  The plume observed by ALI in late June may be a continuation of the low-level activity.

Nyiragongo is a stratovolcano—a steep-sloped structure made of alternating layers of solidified ash, hardened lava, and rocks released by previous eruptions. In contrast to the low profile of neighboring Nyamuragira, Nyiragongo rises to a height of 3,470 meters (11,384 feet) above sea level. Lava flows from Nyiragongo caused substantial casualties in 1977 and 2002.  NASA image created by Jesse Allen, using EO-1 ALI data provided courtesy of the NASA EO-1 Team. Caption by Michon Scott. [Edited by FEWW.]

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Tonga’s Metis Shoal may be erupting

Posted by feww on February 3, 2009

Metis Shoal Submarine Volcano May Be Erupting

1. FEWW seismic analysis of Tonga Islands region in south Pacific Ocean (SPO) indicate that Metis Shoal, a submarine volcano located midway between the islands of Kao and Late (about 50 km NNE of Kao), may be about to erupt, or is currently undergoing a period of unrest.

2. Metis Shoal’s last known eruption occurred in 1995, which produced an island with a diameter of about 300 m and a height of 43 m after a solid lava dome was formed above the surface of water in SPO.

3. Since 1851 some 8 episodes of unrest have been recorded. In three, possibly five, of those occasions new islands were created (1858, 1967-68, 1979, 1995).

Metis Shoal

  • Country:  Tonga
  • Region:  Tonga Islands, SPO
  • Volcano Type:  Submarine volcano
  • Last Known Eruption:  1995
  • Summit Elevation:  43 m asl
  • Latitude: 19.18°S   19°11’0″S
  • Longitude:  174.87°W   174°52’0″W

4. Metis Shoal, a submarine volcano midway between the islands of Kao and Late, has produced a series of ephemeral islands since the first confirmed activity in the mid-19th century. An island, perhaps not in eruption, was reported in 1781 and subsequently was eroded away. During periods of inactivity following 20th-century eruptions, waves have been observed to break on rocky reefs or sandy banks with depths of 10 m or less. Dacitic tuff cones formed during the first 20th-century eruptions in 1967 and 1979 were soon eroded beneath the sea surface. An eruption in 1995 produced an island with a diameter of 280 m and a height of 43 m following growth of a lava dome above the surface. [Caption: GVP]


5. Waves break over Metis Shoal on February 19, 1968, more than a month after the end of a submarine eruption that began in December 1967 and produced an ephemeral island. Metis Shoal has produced a series of small islands during eruptions observed since the mid-19th century. Most recently, an eruption in 1995 produced a lava dome that built up to 43 m above sea level. Photo by Charles Lundquist, 1968 (Smithsonian Astrophysical Observatory). Caption: GVP


6. Map of the Tonga Islands, showing the island groups and location of Metis Shoal, which re-emerged as an island in June 1995. Source: GVP

Other Photos of Metis Shoal


7. Metis Shoal, sea level view. Source: MTU


8. Metis shoal, aerial view. Source: MTU


9. Metis Shoal aerial photo dated December 7,  2006. Source: GVP

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Content of this post: 424 words, 9 paras/captions, 5 images, 1 list w/9 bullets

Posted in fumarolic activity, Submarine eruption, tephra, volcanic unrest, volcanoes | Tagged: , , , , | 7 Comments »