Uitbarsting vulkaan Tungurahua in Ecuador

quote:

Evacuaties rond vulkaan Ecuador
QUITO - De autoriteiten in Ecuador hebben besloten drie dorpen in de directe omgeving van de vulkaan Tungurahua te evacueren. Dat heeft een regeringsfunctionaris dinsdag gemeld. De ruim vijf kilometer hoge vulkaan is de afgelopen week steeds actiever geworden, wat zou kunnen wijzen op een naderende uitbarsting.

De naam Tungurahua betekent 'keel van vuur' in het Quechua, een inheemse taal die door miljoenen mensen in verscheidene landen in de Andes wordt gesproken. Sinds 1999 is de vulkaan een aantal keer met dodelijke afloop uitgebarsten. Daarvoor was hij eeuwenlang niet actief geweest.

quote:

Schools shut as volcano erupts

Ecuador shut schools in four towns near the Tunguarahua volcano as ash spewed more than two miles into the sky, damaging crops and endangering the health of nearby residents.

Authorities are urging people to cover their mouths and noses with masks and shut windows amid the furious venting of Tunguarahua that began on Monday.

The state Geophysical Institute said lava was flowing from the summit caldera - crater - down the flanks of the 16,480ft peak, 85 miles south east of the capital Quito.

The Education Ministry said classes in the nearby towns would be suspended.

Tunguarahua has been active since 1999. Its eruptions killed at least four people in 2006.

tungurahua

ECTV NOTICIAS-REACTIVACIÓN VOLCÁN TUNGURAHUA

quote:

Ecuador raises alert as Tungurahua volcano spews ash

Ecuador has declared an amber alert after the Tungurahua volcano started spewing ash again.

A plume more than 7km (4.3 miles) high could be seen emerging from the volcano in central Ecuador.

The authorities evacuated residents living near the volcano's rim and ordered local schools to close.

The Tungurahua has erupted periodically over the past 12 years, but this is its first significant activity this year.

Monitors said they detected six eruptions, ranging from moderate to large.

"According to our observations, damages to crops, pastures and small effects to the health of people are already evident," the Ecuadorean geophysics institute said.

quote:

In mid-April 2011, after a decade of low activity, Ecuador’s Tungurahua Volcano began a substantial eruption. On April 21st fine ash fell on nearby communities, followed by the appearance of small lava fountains at Tungurahua’s summit. On April 26th significant eruption of ash began, up to an altitude of 38,000 feet (12,000 meters). These emissions continued until at least May 4, 2011.

These natural-color satellite images show ash from Tungurahua on the morning (top) and afternoon (lower) of April 30, 2011. At the time, the Joint Air Force & Army Weather Information Network reported ash at an altitude of 37,000 feet (11,000 meters). In the morning image, a dense column of brown ash is located directly above Tungurahua. The ash cloud extended roughly 40 kilometers (25 miles) to the northeast. By the afternoon an ash column was still visible over Tungurahua, and the ash cloud had spread considerably. The morning image was acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Terra satellite, and the afternoon image was acquired by MODIS aboard the Aqua satellite.

quote:

Molten lava streams from the cone of Tungurahua volcano on April 26.

Tungurahua is one of eight active volcanoes in Ecuador. Less than 80 miles (130 kilometers) to the north, the active Cotopaxi volcano threatens more than a million people living in the Andes highlands.

quote:

Ecuador's Tungurahua volcano (satellite map)—seen here from the town of Cotalo—shot truck-size boulders nearly a mile (1.6 kilometers) away Friday, prompting the evacuation of at least 300 people, according to the Associated Press.

Tungurahua—"throat of fire" in the indigenous Quechua language—sits high in the Andes mountains, about 80 miles (130 kilometers) south of Quito, Ecuador's densely populated capital.

Eruptions are nothing new for the 16,500-foot (5,000-meter) volcano, which roared back to life in 1999 after nearly 80 years of dormancy. (Related: "'Sleeping' Volcanoes Can wake Up Faster Than Thought.")

quote:

New ash emissions from Tungurahua volcano
After a pause of about 10 days in eruptive activity, the Tungurahua volcano has returned to emit ash and gases after 22h22 (TL) last night. These new issues are related to a body of magma that rose and settled in the ducts above the volcanic system in previous weeks and apparently still has not released all the energy nor the material accumulated there.

quote:

The surface activity recorded from last night was characterized by the presence of a permanent emission column of 1.5 - 2 km in height above the crater, with medium to low content of ash, which has directed almost permanently to Northeast. During the early hours of this activity, the amount of ash emitted was higher (see Figure 1) and then decreased to levels considered low, in which the column emission have largely been characterized by sulfur gases and water vapor (see Figure 2). Only from the field of Rio Negro , about 25 km east of the City of Ba�os reported a significant ash fall overnight.

quote:

The constant issue has been accompanied by the registration of tremor signals in the seismograms, as is typical in these cases. The values ​​of the deformation in the inclinometers have shown a slight decrease, while still presenting sporadic seismic events related to the fracture of rocks inside the volcano. The emission of volcanic gases such as sulfur dioxide SO2 until yesterday had declined to values ​​less than 300 tons per day, but with this new volcanic vent opening of the values ​​to be quantified at the end of the day likely reach higher levels.

In the afternoon, when the volcano is partially cleared from the Observatory has been able to identify the presence of new vents on the western flank of the volcano, about 1000 m below the summit, on the head of the Quebrada Achupashal (see Figure 3). The appearance of this line of fumaroles is being investigated in greater detail by the experts of the IG, particularly through the use of infrared cameras.

quote:

The Geophysical Institute estimates that this new opening of a vent, which occurred gradually after nearly two weeks of mild surface activity, confirms the presence of magmatic material within the volcanic conduit with enough energy to rebuild emissions Ashes activity of fumes from magmatic body, so it still must maintain a careful observation of the different parameters that are monitored at the volcano since it could happen again abundant ash emissions in the short term such as occurred in the last third of April.

quote:

Ecuador urges residents near Tungurahua to evacuate
Authorities in the South American nation of Ecuador on Monday afternoon urged residents near the Tungurahua volcano to evacuate after a rapid increase of volcanic activity. Ecuador’s Geophysical Institute of the National Technology School said the Tungurahua volcano had three pyroclastic boulder flows toward the south at around 7:35 a.m. local time on Monday. Its loud roars have reportedly shook residential windows up to 14 kilometers (8.6 miles) away. Previously, at around 2 a.m. local time, the institute registered an explosion as incandescent material covered all of the volcano’s slopes. Some three hours later, intense and moderately strong roars were also registered, accompanied with incandescent material, as well as lava blocks and fluid lava, descending about one kilometer (0.6 mile) down its crater. The Institute warned that the 5,023-meter (16,480-feet) tall Tungurahua continued its strong seismic activity throughout Monday and spewed out thick ash clouds of up to 3 kilometers (1.8 miles) high into the northeastern, southeastern and eastern regions. The Tungurahua Province Emergency Operation Committee subsequently raised its alert level from yellow to orange, immediately activating its emergency protocols. Officials have urged four villages nearby to evacuate in fear of a full eruption. The Tungurahua volcano is located about 135 kilometers (84 miles) south of Quito, the nation’s capital. Its eruptive phases began in 1999 and, since then, it has experienced both calm and highly active periods

quote:

Activiteit Tungurahua stijgt
De Tungurahua (5.023 meter) is gelegen op 135 kilometer van Quito, hoofdstad van Ecuador. De vulkaan is al meer dan twintig jaar actief, maar sinds zondag is deze activiteit opvallend gestegen. De overheid probeert inwoners van vier dorpen te overtuigen het gebied te evacueren.
Ruim 700 mensen leven in landbouwgemeenschappen op de hellingen van de vulkaan, gelegen in het Andesgebergte. Het geofysisch instituut in Ecuador meldt dat de activiteit sinds zondag opvallend is verhoogd.

De vulkaan spuwt grote golven as en stuwt sterk verhitte gaswolken naar de hellingen. Verder vliegen ook hete brokstukken uit de kratermond. De wetenschappers van het geofysisch instituut zien ook een groeiende opeenhoping van lava in de berg.

Los van de schade dat een vulkaan als de Tungurahua kan veroorzaken, blijft het een spektakel om naar te kijken

quote:

Tungurahua volcano's activity has calmed down.
Since 9 December, its activity has consisted only of steaming. No larger explosions or pyroclastic flows have been observed, the Ecuadorian Geohpysical Institute reports in its latest bulletin. Gas measurements show a significant decrease in SO2 emission and deformation shows no indication of new magma rising in the conduit.

quote:

Another series of explosions has occurred early today at Tungurahua volcano in Ecuador, the Instituto Geof�sico (IG) reports. The eruption was reported to be very noisy and caused minor ash fall in nearby villages, but no damage.

From 23:39 (local time) on March 19, a rapid increase of tremor was detected and observers reported roaring noises from the volcano in up to 14 km distance. About an hour after the onset of tremor reports of ash fall came from El Manzano and Choglont�s.

At 00h22 today, there was an loud explosion whose cannon-shot like shock wave was heard in Choglont�s, El Manzano and Puntz�n. Incandescent lava bombs could be seen ejected from the summit crater and landing up to approx. 200 m distance on the upper slope.

From the 01h08 (local time) tremor decreased and also the noises from the volcano. Cloud cover prevented detailed observations this morning.

According to a first analysis, only the south-west sector received ash fall. In the Choglont�s area, ash continued to fall until 07:00 (local time) and was measured to have accumulated 383 grams per square meter, corresponding to less than 1 mm of ash.

quote:

Activity increasing
Tungurahua volcano's activity has been increasing, Ecuador's Instituto Geof�sico reports. Throughout the morning of March 26, a constant column of steam and ash was rising from the summit crater, reaching up to 3 km height and drifting towards the northeast, where ash fall occurred. Ash fall was significant in the San Francisco and Black River areas, and mild in Ba�os, the Ventanas en Runt�n, Juive, Pondoa, Puntz�n and Cus�a sectors.
Occasional roaring explosion sounds were heard from small to moderate explosive events. Seismic activity remains characterized by volcanic tremor episodes lasting several minutes, interspersed with tremor bursts and long-period events, which are related to fluid movements within the volcano

quote:

Strong eruption at Tungurahua in Ecuador
Ecuador has issued the secong-highest warning level (Orange) for towns near the Tungurahua volcano. After a huge increase in seismicity on December 15, 2012 a strong ash explosion occurred at 14:35 local time.

According to local reports, the eruption produced an ash plume rising to 6 km altitude and was visible from Ambato, Riobamba, Pelileo and Patate. The explosion followed an increase in seismicity over the last two days.

Tongurahua (“Throat of Fire”), about 135 km south of the capital Quito, remains in full vulcanian eruption complete with ashfall, loud roars, pyroclastic flow and plumes of volcanic ash over 7 km at times. (ER)

The area of the warning covers the adjacent provinces of Tungurahua and Chimborazo, according to the national civil defence agency.

Tungurahua, a steep-sided andesitic-dacitic stratovolcano that towers more than 3 km above its northern base, is one of Ecuador’s most active volcanoes. Three major volcanic edifices have been sequentially constructed since the mid-Pleistocene over a basement of metamorphic rocks. Tungurahua II was built within the past 14,000 years following the collapse of the initial edifice. Tungurahua II itself collapsed about 3000 years ago and produced a large debris-avalanche deposit and a horseshoe-shaped caldera open to the west, inside which the modern glacier-capped stratovolcano (Tungurahua III) was constructed.

Historical eruptions have all originated from the summit crater. They have been accompanied by strong explosions and sometimes by pyroclastic flows and lava flows that reached populated areas at the volcano’s base.

Prior to a long-term eruption beginning in 1999 that caused the temporary evacuation of the city of Ba�os at the foot of the volcano, the last major eruption had occurred from 1916 to 1918, although minor activity continued until 1925 (GVP).

Explosión volcán Tungurahua diciembre 2012.. Tungurahua vulcano eruption 2012

Ecuador's Tungurahua volcano threatens local villages

quote:

Ecuador volcano blasts more rock and ash
The Tungurahua volcano in central Ecuador keeps spewing gas, ash and red-hot rock, forcing hundreds to evacuate from their homes.

The country's Geophysical Institute says incandescent rock shot from the crater of the 5,023m high mountain fell about one kilometre down its flanks. Explosions early Wednesday rattled windows 14km away, while rain-borne ash has been falling to the southwest of the crater.

Regional emergency director Lourdes Mayorga says that about 100 families are staying in shelters away from the danger zone, though they return during the day to work their fields. She says there will be forced evacuations if the volcanic activity intensifies.

Tungurahua has been active for the past 13 years. An outburst in 2006 left four dead and two missing.

Volcán Tungurahua incremento actividad en forma repentina, Ecuador

quote:

Evacuaties wegens vulkaanuitbarsting Ecuador

Ten minste 200 mensen hebben maandag (lokale tijd) in Ecuador hun huis moeten verlaten, toen de vulkaan de Tungurahua uitbarstte.

Dat hebben verscheidene buitenlandse media gemeld. Er zijn geen berichten over gewonden.

De vulkaan ligt in het hart van het Zuid-Amerikaanse land, op zo'n 95 kilometer van de hoofdstad Quito.

Na een ''hevige explosie'', die honderden kilometers verderop werd gevoeld, spuugde de vulkaan rotsblokken, gas en asregens zeker 5 kilometer hoog de lucht in. De autoriteiten hebben daarop de code 'oranje' afgegeven.

Na een periode van zo'n 80 jaar kwam de slapende vulkaan Tungurahua, dat in de taal van de indianen van Ecuador 'keel van vuur' betekent, in 1999 tot leven.

Volcano In Ecuador Erupts Explodes Ecuador's Tungurahua Volcano Records Major Explosion

quote:

Vulkaan Tungurahua spuwt lava en as
Ecuador heeft zondag de alarmfase opgetrokken, nadat de vulkaan Tungurahua lava en as is beginnen spuwen. Dat ging gepaard met zware explosies. De vulkaan bevindt zich in het midden van het land, in een toeristische regio nabij het Amazonewoud.

De vulkaan, die meer dan 5.000 meter hoog is, is een van de meest actieve in het Zuid-Amerikaanse land. De autoriteiten verhoogden zondag de alarmfase naar categorie oranje, de op een na hoogste. Indien ze nog verhoogd wordt tot code rood, moet overgegaan worden tot preventieve evacuaties.
130 km van hoofdstad

De Tungurahua ligt zo'n 130 kilometer ten zuiden van de Ecuadoraanse hoofdstad Quito. In 2006 kwamen zes mensen om het leven bij een zware uitbarsting van de vulkaan en in 2010 werd overgegaan tot een massale evacuatie van inwoners en toeristen.