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Archive for the ‘volcanic earthquake’ Category

Significant Earthquakes Strike Bárðarbunga

Posted by feww on September 1, 2014

SCENARIOS 023, 017, 09, 08, 07

3 Earthquakes measuring magnitude 5.0 or greater strike near Bardarbunga volcano

At least 22 earthquakes measuring magnitude 3.0 or greater, including 3 measuring magnitudes 5.0, 5.1 and 5.3 have occurred near Bardarbunga volcano since Saturday, reported IMO.

Volcanic activity in Holuhraun Lava Field

Meantime, the fissure eruption continues “at a stable level,” said IMO. “No explosive activity is observed, the eruption remains an effusive lava eruption. Visual observation by webcam and low level volcanic tremor on seismometers do not show any obvious changes since [Sunday] evening.”

Bardarbunga 5 or greater 01Sep14
Earthquake Location Map. Source: USGS/EHP

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Posted by feww on August 29, 2014

SCENARIOS 023, 017, 09, 08, 07

Fissure eruption reported in Holuhraun lava field, Dyngjujokull glacier, Iceland

The eruption breached surface in Holuhraun lava field about 5km north of Dyngjujokull about 00:02 GMT on Friday, said IMO.

Seismic activity has decreased as a result of the pressure release, however a significant amount of earthquakes is still detected in the magma dike, between the eruption site and south to about 5 km into Dyngjujökull.

The aviation color-code was raised to “red” and back to “orange,” as there was no ash emission.

A significant shock measuring 5.2Mw centered at 64.770°N, 17.335°W occurred at a depth of 7.5km at 12:21UTC, said USGS/EHP.

Tavurvur Volcano Erupts in Papua New Guinea (PNG)

Mount Tavurvur on PNG’s East New Britain Island erupted violently at 3.00 a.m. local time,  said Rabaul Volcanological Observatory.

It ejected plumes of smoke and ash to a height of about 17,000m over the South Pacific island country, forcing the authorities to warn local residents to stay indoors, and causing airlines to alter some flight paths.

“Flight paths between Sydney and Narita (Tokyo) and Sydney and Shanghai have been altered as a result of the volcanic ash cloud over Rabaul in eastern Papua New Guinea,” Qantas spokeswoman told Reuters.

The eruption reached the top of the atmosphere at 50,000 feet, which is the same height as which planes travel, could disrupt air flights from Australia, said the Volcanic Ash Advisory Center in Darwin, Australia.

M5.6 Quake Strikes South of Athens, Greece

Centered at 36.738°N, 23.757°E, about 137km south of Athens, the quake struck at a depth of 91.8km, said USGS/EHP.

The quake was felt in Athens; however, there were no reports of casualties or severe damage, as of posting.

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Red Alert as Bardarbunga Volcano Erupts

Posted by feww on August 23, 2014

SCENARIOS 023, 09, 08, 07

Bardarbunga erupting subglacially

The Icelandic Met Office (IMO) has issued a red alert for aviation, warning that Bardarbunga volcano could spew significant ash emissions.

A small sub-glacial eruption is currently occurring at Bardarbunga, said the Met Office.

“Warning: It is believed that a small subglacial lava-eruption has begun under the Dyngjujökull glacier. The aviation color code for the Bárðarbunga volcano has been changed from orange to red.”

The red alert is Iceland’s highest warning level on their five-point scale.

On Wednesday, authorities evacuated hundreds of people from several areas  north of the volcano, fearing that the volcano could erupt and cause significant flooding and mudslides.

Bardarbunga, a part of a large volcanic system,  sits under up to 400 meters of ice, the Vatnajokull glacier, in central Iceland.

The following update is provided by IMO

23rd August 2014 14:10UTC –  small eruption Occurring beneath  Dyngjujökull

  • A small lava-eruption has been detected under the Dyngjujökull glacier.
  • An estimated 150-400 meters of ice covers the area.
  • The aviation color code for the Bárðarbunga volcano has been changed from orange to red.
  • At 14:04UTC, an earthquake measuring 4.5Mw occurred near the volcano.

Bardarbunga (Bárðarbunga Icelandic spelling), is a stratovolcano, located under the Vatnajökull glacier. It is the second highest mountain in Iceland, standing 2,010 meters a.s.l. The volcanic system that includes Bardarbunga is more than 200km long and 25km wide.


Vatnajökull (Glacier of Lakes), also known as the Vatna Glacier, is Iceland’s largest and most voluminous glacier, located in the south-east of the island. With an area of 13,600 km², Vatnajökull covers more than 8 percent of the country. It is also the largest ice cap in Europe by volume (3,100 km³).

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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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Plosky Tolbachik Volcano Erupts

Posted by feww on March 5, 2013

Plosky Tolbachik spews two long streams of lava

PLOSKY TOLBACHIK VOLCANO (55.83 N, 160.39 E; CAVW #1000-24-)
Elevation:  3,085 m (10119 ft )
Aviation Color Code:  ORANGE

The massive 3,085-meter-high Plosky [flat] Tolbachik, one of Russia’s largest volcanoes, has spewed two streams of lava, one extending for about 18km and the other 6km one made 18 kilometers, said a report.

  • “The fiery river has been setting trees on its way ablaze while turning ice and snow into clouds of steam.”

Simultaneous activities have also been detected in the Kizimen and Shiveluch volcanoes in the Kamchatka region, the report said.

Holocene Volcanoes in Kamchatka
Holocene Volcanoes in Kamchatka
. Source: Institute of Volcanology and Seismology, Kamchatka, Russia

4 Kamchatka volcanoes are currently on ORANGE alert according to KVERT

1. PLOSKY TOLBACHIK VOLCANO (55.83 N, 160.39 E; CAVW #1000-24-)
Elevation:  3,085 m (10119 ft )

2. SHEVELUCH VOLCANO (56.64 N, 161.32 E; CAVW #1000-27-)
Elevation: 3, 283 m [the dome elevation: 2,500 m)

3. KIZIMEN VOLCANO (55.13 N, 160.32 E; CAVW #1000-23-)
Elevation: 2,485 m (8151 ft)

4. KARYMSKY VOLCANO (54.05 N, 159.44 E; CAVW #1000-13-)
Elevation 1,486 m (4874 ft)

3 other volcanoes on YELLOW alert

I. KLYUCHEVSKOY VOLCANO (56.06 N, 160.64 E; CAVW #1000-26-)
Elevation:  4,750 m

II. BEZYMIANNY VOLCANO (55.97 N, 160.6 E; CAVW #1000-25-)
Elevation: 2,882 m

III. GORELY VOLCANO (52.56 N, 158.03 E; CAVW #1000-07-)
Elevation: 1,828 m

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Mass die-offs resulting from human impact and the planetary response to the anthropogenic assault could occur by early 2016.

  • SYMBOLIC COUNTDOWN: 1,103 Days Left to ‘Worst Day’ in the brief Human  History
  • The countdown began on May 15, 2011 …


Global Disasters: Links, Forecasts and Background

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‘Red’ Alert at Copahue Volcano

Posted by feww on December 24, 2012

Copahue volcano activity could intensify

Authorities in Argentina and Chile have raised the alert at Copahue volcano  in Biobio region to the highest level after detecting continued seismic activity on Sunday.

Copahue volcano
A column of ash and smoke from Copahue volcano rises above the town of Caviahue, a popular ski resort in Neuquen province, Argentina, some 1500 km SW of the capital Buenos Aires. Photo: AFP. Image may be subject to copyright. 

  • Copahue first erupted on Saturday, showering ash on nearby villages and prompting many to evacuate.
  • “The intensity of seismic signals suggests the eruption in progress is on the smaller side [however] we cannot discount the possibility that the activity could turn into a larger eruption,” said a spokesman for the Chilean Geology and Mining Services.
  • The 2,970-meter volcano is in SW Argentina’s Neuquen province, near the Chilean border.
  • About 3,000 people live in the vicinity of the massive volcano, including  the residents of Copahue, the town of Caviahue and indigenous Mapuche communities.
  • The ash plume rose  to a height of about 1.5km (5,000ft) above the crater, said Chile’s emergency office (ONEMI).

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Global Disasters: Links, Forecasts and Background


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Tens of Thousands Flee Mt. Gamalama Eruption

Posted by feww on December 6, 2011

Mt Gamalama erupts covering Ternate island with ash; tens of thousands flee

Hot ash and other volcanic debris from Gamalama volcano, which began erupting late Sunday evening, has covered almost the entire island city of Ternate, prompting tens of thousands of residents to flee.  The eruption ejected volcanic matter to a height of about 2 km above the volcano summit, and covered the island with a thick blanket of ash.

A small explosive eruption of Gamalama volcano in September 1980 is seen from the airport on the NE side of Ternate Island. Nearly 40,000 persons evacuated to a nearby island during the first two days of the eruption, which began on September 4 and lasted until the 23rd. Photo by S.R. Wittiri, 1980 (Volcanological Survey of Indonesia); caption by GVP

Disaster Calendar 2011 – December 6

[December 6, 2011]  Mass die-offs resulting from human impact and the planetary response to the anthropogenic assault could occur by early 2016.  SYMBOLIC COUNTDOWN: 1,562 Days Left to the ‘Worst Day’ in Human History

  • Ternate island, Indonesia. Hot ash and other volcanic debris from Gamalama volcano, which began erupting Sunday evening, has covered almost the entire island city of Ternate, prompting tens of thousands of residents to flee, and forcing  the closure of a nearby airport.  The eruption ejected volcanic matter to a height of about 2 km above the volcano summit.
    • More than 100 volcanic quakes have been recorded since the eruption began.
    • The 4-level alert status is currently at Level 3.
    • State volcanologist Surono said Gamalama had ejected “clouds of thick gray ash” into the air, and slow moving lava was  visible at the summit.

  • Gamalama Volcano
    • The 1,715-metre volcano forms the entire island of Ternate in North Maluku province, Indonesia
    • Most of the building on the island were destroyed during an 1840 eruption.
    • The volcano’s last major eruption occurred in 2003.
    • Recent eruptions include 1980, 1983, 1994, 2003 and 2011.
    • A violent eruption during Aug.- Sept. 1775 killed 141 people.
    • Gamalama is one of the 128 active Indonesian volcanoes (total of about 500).

Gamalama volcano (also known as the Peak of Ternate), one of the most active volcanoes of Indonesia, forms Ternate Island off the western coast of Halmahera. The northern and youngest of three cones forming the summit of Gamalama is seen here from the NE. Unvegetated areas in this 1994 photo consist of the ejecta blanket from recent explosive eruptions. Frequent eruptions have occurred since the 16th century, most of which originated from the summit vent. Photo by Gatot Sugiharto, 1994 (Volcanological Survey of Indonesia); caption by GVP.

Other Global Disasters

  • New Hampshire, USA. The disaster President has declared a major disaster exists in the State of New Hampshire following the pre-Halloween  severe storm and snowstorm that occurred during the period of October 29-30, 2011
    • The worst affected areas were the counties of Hillsborough and Rockingham, according to a WH press statement.
  • Kentucky, USA. Uniontown, Kentucky has declared a State of Emergency because pumps that keep water out of the town failed.
    • “Officials say the town has been pounded with rain, four inches in a 24 hour period. Two and half inches of that came down within two hours,” a report said.
    • The rainwater has flooded local streets and roads.

Earthquake and Volcano Links

Global Disasters

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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.

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

More Volcano Links

FEWW Volcanic Activity Forecast

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Eyjafjallajökull Eruption – ALI-EO1 Satellite Image

Posted by feww on May 6, 2010

Increased seismicity reported at Eyjafjallajökull

More magma pumping from the volcano’s depth GPS-monitoring indicates inflation

ALI on NASA’s EO-1 satellite captured this natural-color image of Eyjafjallajökull Volcano ejecting ash and steam on May 2, 2010. Source: NASA.  Download large image (2 MB, JPEG)

Magma Intrusion – 05 May 2010 13:40

Icelandic Met Office (IMO) has detected increased seismic activity beneath Eyjafjallajökull starting Monday 3 May. “Precise locations of the earthquakes show that their source is at first very deep, at about 23 km depth, but then migrates upwards. This strongly indicates that “new” magma is intruding into the magma conduit and pushing on the over-lying magma, causing a difference in pressure at the surface. It is therefore anticipated that the eruption will continue at full force in the next days.”

Plume Height

IMO’s weather radar reported the plume height reaching to a height of about 6.5km a.s.l.

Lava Flow

Lava is flowing in a northerly direction and spreading at 500 m a.s.l., IMO said. “The lava tongue is about 200 m wide and lava channels that join at the tongue are about 30-60 m wide. The lava channels gets wider every day.”

GPS deformatio

IMO reported significant horizontal movement at GPS stations mounted around
Eyjafjallajökull in the last 2 days.

Other details at Eruption in Eyjafjallajökull (PDF file)

Volcanic Ash Advisory from London – Issued graphics

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Serial No 1,683. Starting April 2010, each entry on this blog has a unique serial number. If any of the numbers are missing, it may mean that the corresponding entry has been blocked by Google/the authorities in your country. Please drop us a line if you detect any anomaly/missing number(s).

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Mayon: Not Much Happening – Update 4 Jan 2010

Posted by feww on January 4, 2010

Mayon seems to have taken another day off!

Not much is happening on the geophysical from at the volcano. The state vulcanologists told reporters they had not observed in recent rise of magma.

The govt of Albay province said it was allowing some 45,000 people living withing the 7 to 8-km zone from Mayon to return to their homes. However, another 2,000 or so people who live within the 6-km permanent danger zone (PDZ) must stay in the make shift shelters for now.

The provincial governor was quoted as saying that the province was planning to permanently relocate the people who lived in the 6-km PDZ.

It defies the imagination however why those people were allowed to settle in the PDZ in the first place.

Mayon Volcano Bulletin 22 released by PHIVOLCS on 4 January 2010

Mayon Volcano’s (13.2576 N, 123.6856 E) seismic monitoring network  detected 7 volcanic earthquakes and 33 rockfall events related to the detachment of lava fragments at the volcano’s upper slopes. Steaming activity was not observed due to thick clouds that covered the summit crater. Pale crater glow was observed last night. Sulfur Dioxide (SO2) measurement was not conducted yesterday due to rain that occurred over the volcano area.

Alert Level 3 is in effect over Mayon, which means that the 6-km radius Permanent Danger Zone around the volcano and the 7-km Extended Danger Zone on the southeast flank of the volcano should be free from human activity because of sudden explosions that may generate hazardous volcanic flows. People residing close to these danger areas are also advised to observe precautions associated with post-eruption activity, such as rockfalls, pyroclastic flows, and ash fallout which can also occur anytime due to instabilities of lava deposited on steep slopes. Active river channels and those perennially identified as lahar prone in the southern sector should also be avoided especially during bad weather conditions or when there is heavy and prolonged rainfall. Civil aviation authorities must advise pilots to avoid flying close to the volcano’s summit as ejected ash and volcanic fragments from sudden explosions may pose hazards to aircrafts. PHIVOLCS-DOST is closely monitoring Mayon Volcano’s activity and any new significant development will be immediately posted to all concerned.

For previous entries, additional information, photos and links to Mayon Volcano entries see links below:

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