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Archive for the ‘Taal Volcano’ Category

Mt. Bulusan major ash explosion forces evacuation

Posted by feww on February 21, 2011

Mt. Bulusan massive ash explosion covers 3 cities, 41 villages

Philippines Mt Bulusan volcano erupted again Monday at 01:12UTC showering at least three towns with large quantities of ash.

The ash explosion as seen from the town of Irosin, about 600km SE of Manila, Philippines. Bulusan Volcano is located in Sorsogon province in Bicol region. Credit AP. Image may be subject to copyright.

A massive ash plume from the 1,560-m volcano drifted south covering the town of Irosin (population: 46,000), according to a civil defense operations official.

“There’s zero visibility at Irosin at the moment, and we can’t get in touch with officials there,” he told AFP.

A state volcanologist told AFP that explosion sounds were followed by an ash column that rose by up to  2.5km (1.6 miles) above the crater.

Map of the Philippines Volcanoes. Click image to enlarge.

“The huge plume of grayish smoke shot up to more than a mile (2 kilometers) toward the blue sky, with the ash drifting southwest toward four farming towns in Sorsogon province, where about 1,200 villagers fled to emergency shelters and houses of relatives, said Benito Ramos, who heads the government’s disaster-response agency.” AP reported.

“Volcanic ash has fallen in the towns of Casiguran and Juban, located at the foot of the volcano. Philippine troops will be evacuating some 1,000 residents from these two towns,” Xinhua quoted an official as saying.

The explosion at Bulusan volcano lasted for 19 minutes, starting at 09:12 local time (01:12UTC) and has since affected at least 100,000 people in 3 towns and 41 villages in the surrounding areas, the National Disaster Risk Reduction Management Council said.

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Posted in Philippines volcanoes, Taal Volcano, volcanic event, Volcanic Explosions, volcano | Tagged: , , | Leave a Comment »

Mayon Volcano Oozes Lava

Posted by feww on December 15, 2009

Mayon, Philippines most active volcano, oozes lava and ejects plumes of ash into the air

The Philippines Institute of Volcanology and Seismology, PHIVOLCS, raised the five-step alert to 3 after increased activity at Mayon volcano.

The authorities have evacuated thousands of residents from the 6-km (4 miles) permanent danger zone, which is now declared a prohibited area.

About 50,000 people live in an 8km (5 mile) radius of the mountain.

Lava cascades down the slopes of Mayon volcano in Legazpi city, Albay province, Monday Dec. 14, 2009.  (AP Photo/Nelson Salting). Image may be subject to copyright.

About 30,000 people were evacuated from the foot of Mt Mayon after the volcano spewed ash and lava in Albay province, the Philippines.  Photo:AFP. Image may be subject to copyright. Click image to enlarge.

Magma had been steadily rising at Mayon since late November and finally oozed out of the crater late Monday, and the activity at the volcano is expected to intensify, said PHILVOC.

If magma continues to push up the crater at a steady rate there would be lava flows, and “the possibility of an explosion.” PHILVOC reported.

Major Volcanoes of the Philippines Location Map. Click image to enlarge.

The 2467-meter Mayon Volcano is a stratovolcano [it is renowned for its almost perfectly conical shape] islocated about 15 kilometres northwest of Legazpi City [about 500 kilometers south of the capital, Manila,] in the province of Albay, Bicol Region, on the island of Luzon, in the Philippines.

Mayon is one of the 22 or so active volcanoes in the Philippines, and has caused the deaths of thousands of people and devastated several towns and villages in three major eruptions since its 1814. In 2006, after several eruptions, typhoon Durian triggered mudslides of volcanic ash on November 30, which buried  several villages near the foot of the mountain, killing about 1,000 people.

Fire Earth Moderators believe more volcanic activities at other Philippines volcanoes are highly probable in the near future. The volcanoes located on the island on Mindanao are particularly liable to erupt in the next 12 to 36 months.

The moderators also believe a large eruption may occur at Taal volcano. For other related forecast, see links below and search blog contents.

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Posted in Taal Volcano, volcanism, volcano, Volcano Hazard | Tagged: , , | 10 Comments »

Strong Quake Strikes Offshore Mindoro, Philippines

Posted by feww on September 18, 2009

FOR MARCH 25, 2010 Earthquake Details click >>

Strong Quake Strikes Mindoro Philippines

Magnitude 6.0 earthquake strikes near Mindoro, Philippines

An earthquake measuring 6.0 Mw struck in the South China Sea off the west coast  of Mindoro, Philippines, at a depth of 50.1 km on September 18, 2009  at 06:23:58 UTC, USGS/ EHP said.

10-degree Map Centered at 15°N,120°E

sep 18 10-00UTC
Earthquake Location Map. Source of the original map: USGS

Earthquake Details

  • Magnitude: 6.0
  • Date-Time:
    • Friday, September 18, 2009 at 06:23:58 UTC [Friday, September 18, 2009 at 02:23:58 PM at epicenter]
  • Location: 12.573°N, 120.469°E
  • Depth: 50.1 km (31.1 miles)
  • Distances:
    • 115 km (75 miles) SW of Calapan, Mindoro, Philippines
    • 145 km (90 miles) SSW of Batangas, Luzon, Philippines
    • 230 km (145 miles) SSW of MANILA, Philippines
    • 250 km (155 miles) S of Olongapo, Luzon, Philippines
  • Location Uncertainty: horizontal +/- 8.9 km (5.5 miles); depth +/- 11.7 km (7.3 miles)
  • Parameters NST= 52, Nph= 52, Dmin=827.4 km, Rmss=1.24 sec, Gp= 47°, M-type=teleseismic moment magnitude (Mw), Version=7
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2009lsap

The Philippine Institute of Volcanology and Seismology (Phivolcs) reported the quake as a magnitude 6.1 shock on the Richter scale.

Phivolcs said the quake was felt at various intensities in Mamburao and Batangas City; Makati City, Pasay City, Manila City, Tagaytay City and Dasmariñas City;  in San Jose town (in Occidental Mindoro), Puerto Galera, Malay (in Aklan), and Guinayangan (in Quezon).

Phivolcs also said it was expecting aftershocks and some damage caused by the earthquake; however, as of posting, no damage had been reported.

There was no report of tsunami after the  quake.

Seismic Hazard Map

Seismic Hazard Map-midoro

Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Historic Seismicity

Historic Seismicity - mindoro
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

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Posted in earthquake forecast, Earthquakes, Mamburao, Mayon Volcano, PHIVOLCS, seismic activity report, Taal Volcano, volcanic activity | Tagged: , , , , , , , | 8 Comments »

Mount Mayon neighbors on evacuation alert

Posted by feww on July 12, 2009

About 7,000 people living near Mount Mayon are put on evacuation alert — GMA News

According to the latest National Disaster Coordinating Council (NDCC) report on Mayon’s activity issued on July 11, 2009, some 1,675 families or 6,996 persons will be evacuated from the 7-km Extended Danger Zone (EDZ), an area located on the SE flank of the volcano and the 6-km Permanent Danger Zone (PDZ) areas, if the Philippine Institute of Volcanology and Seismology (Phivolcs) raises the  Alert Level for the area from 2 to 3 (on a scale of 0-5).

Alert Level 3 is regarded as  “significant local eruption,” on Phivolcs’ five-level alert system.


Country:  Philippines
Region: Luzon (Philippines)
Volcano Type: Stratovolcano
Last Known Eruption: 2008
Summit Elevation: 2,462 m
Latitude: 13.257°N
Longitude: 123.685°E
Source: Global Volcanism Program (GVP)

Beautifully symmetrical Mayon volcano, which rises to 2462 m above the Albay Gulf, is the Philippines’ most active volcano. The structurally simple volcano has steep upper slopes averaging 35-40 degrees that are capped by a small summit crater. The historical eruptions of this basaltic-andesitic volcano date back to 1616 and range from strombolian to basaltic plinian, with cyclical activity beginning with basaltic eruptions, followed by longer term andesitic lava flows. Eruptions occur predominately from the central conduit and have also produced lava flows that travel far down the flanks. Pyroclastic flows and mudflows have commonly swept down many of the approximately 40 ravines that radiate from the summit and have often devastated populated lowland areas. Mayon’s most violent eruption, in 1814, killed more than 1200 people and devastated several towns. Eruptions that began in February 2000 led PHIVOLCS to recommend on 23 February 2000 the evacuation of people within a radius of 7 km from the summit in the SE and within a 6 km radius for the rest of the volcano. Photo by Kurt Fredrickson, 1968 (Smithsonian Institution). Caption: GVP

Map of Major volcanoes of the Philippines

Alert Level stays at 2 for now

On Sunday, Phivolcs research specialist Rudy Lacson reportedly told GMANews.TV that there were no signs of volcanic activity that would warrant raising Mayon’s alert level.

“Three volcanic earthquakes were detected and a more ‘intense’ glow at the crater were observed within the past 24 hours, but Lacson said these signs were ‘normal’ for the volcano’s current status.” GMA said.

“Lacson said Phivolcs was still closely monitoring Mayon’s volcanic activity and advised people in the area to stay away from the six-kilometer radius permanent danger zone.

“The provincial government earlier banned any human activity near the volcano after Phivolcs raised on Friday the alert level from 1 to 2 following an increase in abnormal activity in the past days.”

Phivolcs’ latest bulletin described Alert Level 2 as “a state of unrest which could lead to ash explosions or eventually to hazardous magmatic eruption.”

“Officials also advised 4,000 farmers who were keeping watch over crops within the permanent danger zone to return to their villages at night to avoid getting caught by surprise should the volcano erupt.” GMA said.

Mayon volcano, which last erupted in 2008, is considered to be the most active volcano in the Philippines.

FEWW moderators believe that the Philippines should brace itself for major waves of seismic and volcanic activities in the coming weeks, months and years..

Mount Mayon Photos:

A nighttime view from Legaspi City on September 14, 1984, shows incandescent lava flows descending the SW flank of Mayon volcano in the Philippines. The flows traveled about 4 km to the lower flanks of the volcano, adjacent to previous flows from eruptions in 1968 and 1978. Photo by Norm Banks, 1984 (U.S. Geological Survey). Caption: GVP.

The ‘Perfect’ Volcano

Mayon volcano in the Philippines is one of Earth’s best examples of a classic, conical stratovolcano. Its symmetrical morphology is the exception rather than the rule, and is the result of eruptions that are restricted to a single central conduit at the summit of the volcano. Eruptions are frequent enough at Mayon, the most active volcano in the Philippines, to overcome erosive forces that quickly modify the slopes of most volcanoes. Photo by Chris Newhall, 1993 (U.S. Geological Survey). Caption: GVP.

Pyroclastic Flows on Mt Mayon

Ash clouds rise above a pyroclastic flow traveling down the Buang valley on the upper NW flank of Mayon volcano in the Philippines on September 12, 1984. The toe of the advancing pyroclastic flow is visible at the lower right. These pyroclastic flows traveled down to 100 m elevation at rates of about 20 m/sec.  Photo by Olimpio Pena, 1984 (Philippine Institute of Volcanology and Seismology). Caption: GVP.

Philippines Volcano
July 20, 2006 photo shows a phreatic explosion [ultravulcanian eruption, also described as steam-blast eruption]  occurring along the lower slopes as lava cascades down the 8,077-foot (2,462-meter) Mayon volcano in the central Bicol region in the Philippines. (AP Photo/Bullit Marquez, FILE). Image may be subject to copyright.

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Posted in conical stratovolcano, Seismology, steam-blast eruption, Taal Volcano, ultravulcanian eruption, Volcanology | Tagged: , , , , , | 7 Comments »