March 16, 2016. EN. Rincon de la Vieja , Tungurahua , Yasur , Soufrière Hills .

Home / blog georges Vitton / March 16, 2016. EN. Rincon de la Vieja , Tungurahua , Yasur , Soufrière Hills .

March 16, 2016. EN. Rincon de la Vieja , Tungurahua , Yasur , Soufrière Hills .

March 16, 2016.

 

 

Rincon de la Vieja , Costa Rica :

Experts from the OVSICORI visited the Rincon de la Vieja Volcano to analyze his recent activity.
They recommend to northern residents volcano to keep a watch on the rivers.
Recent phreatic eruptions eject material that fell in areas near the crater, the rains that have been present in the area, make these materials issued by the Rincon de la Vieja, can descend into the ravine Zanjón.
Hence the recommendation of the experts to the people of north of the volcano.
Phreatic eruptions of the volcano are classified as normal for an active volcano.
After the events of the previous week, a decline in activity is reported.

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The Volcanological and Seismological Observatory of Costa Rica (OVSICORI) on Tuesday posted a video of a new eruption of Rincón de la Vieja Volcano, located in the province of Guanacaste.
The explosion was recorded at approximately 4:20 p.m. by experts of OVSICORI and were similar to those recorded earlier this month.
The video shows a column of steam and gas reaching more than 700 meters high.
Local residents said that the ash had fallen on the roofs of their homes, in an area of ​​six kilometers around the volcano, mainly in the communities north of the crater, Upala and Buenos Aires.

The Rincón de la Vieja, located 270 km northwest of San Jose, showed low activity during the past 15 years. The OVSICORI reported that ash explosions, mud and steam was intensified last year.

Access to the National Park Rincón de la Vieja is open to the public, but officials of the National System of Conservation Areas warned visitors to avoid the area around the crater.

Sources : Teletica, Ticotimes .

Photo : Prensa libre

 

Tungurahua, Ecuador :


Tuesday, March 15, 2016
SUMMARY OF THE ACTIVITIES OF THE VOLCANO

The volcanic activity is moderate to high.
During the last hours, most of the time, the volcano remained cloudy
However, an explosion early in the morning was recorded, which was characterized by a cannon shot heard in the Runtun area, and accordingly issued incandescent rocks on the northeast flank, accompanied by ash fall in Patate and Juive.
Currently, the volcano remains covered.


TECHNICAL AND OBSERVATIONS ANNEX
Seismicity:
From 11:00 (TL) yesterday until 11:00 (TL) today, it was recorded 1 explosion (EXP) and 86 small events long period (LP).
Observations emissions and ashes:
In the last hours, most of the time, the volcano remained cloudy
However, an explosion early in the morning was recorded, which was characterized by a cannon shot heard in the Runtun area, and accordingly issued incandescent rocks on the northeast flank, accompanied by ash fall in Patate and Juive.
Currently, the volcano remains covered.
Rain and lahars:
There was no rain in the volcano area.

 

tungurahua


GENERAL INFORMATIONS
If the rains become more intense in the volcano area, they can re-mobilize deposits from pyroclastic flows and generate lahars. For this reason, we recommend extreme caution when driving on roads and highways that cross the gorge through which these flows are down and the regions which in the past have been affected by this kind of phenomenon

Source : IGEPN

Photos : News.msn , A Reyes .

 

Yasur , Tanna Island , Vanuatu :

 

19°32’0”S 169°26’30”E
Summit 1184ft (361m)
Current Vanuatu Volcano Alert Level: Level 2

The Alert Level for Tanna Volcano remains at Level 2.
This means that the Yasur activity has changed. Explosions become intense, volcanic bombs may fall in and/or around the crater and volcanic gas and ashes can also affect some villages. The area of risk remains around the volcanic crater and in areas expose to trade winds.

yasur


This is another reminder to all visitors to observe this volcano away from the crater rim to avoid volcano activity related impacts.
All communities, villages, visitors and travel agencies have to seriously consider this information.

The Department of Meteorology and Geohazards will continue to closely monitor this volcano activity. More information will be provided accordingly when necessary.

Source : Geohazard.

Photo : Photovolcanica.

 

Soufrière Hills , Montserrat :

Activity at the Soufrière Hills Volcano remains low.

The seismic network recorded 18 volcano-tectonic earthquakes this week. 13 of these occurred in a very brief swarm which started at about 04:42 (local time) on 5th March.

Sulphur-dioxide measurements were not possible during the reporting period.

 

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Pyroclastic flows can occur at any time without warning on any side of the volcano, including Gages from where they can travel rapidly into Plymouth. Tracks across the Belham valley are frequently destroyed or heavily modified by flash flooding or lahars, and caution should be exercised crossing the valley during and after rainfall.

The Hazard Level is 1. There is no public access to Zone V, including Plymouth. Maritime Zones E and W are daytime transit only between sunrise and sunset (boats may sail through the zone but must not stop). Anyone who ignores these restrictions is liable to be prosecuted.

 

The complex, dominantly andesitic Soufrière Hills volcano occupies the southern half of the island of Montserrat. The summit area consists primarily of a series of lava domes emplaced along an ESE-trending zone. The volcano is flanked to Pleistocene complexes to the north and south. English’s Crater, a 1-km-wide crater breached widely to the east by edifice collapse, was formed about 2000 years ago as a result of the youngest of several collapse events producing submarine debris-avalanche deposits. Block-and-ash flow and surge deposits associated with dome growth predominate in flank deposits, including those from an eruption that likely preceded the 1632 AD settlement of the island, allowing cultivation on recently devegetated land to near the summit of the volcano. Non-eruptive seismic swarms occurred at 30-year intervals in the 20th century, but no historical eruptions were recorded on Montserrat until 1995. Long-term small-to-moderate ash eruptions beginning in that year were later accompanied by lava-dome growth and pyroclastic flows that forced evacuation of the southern half of the island and ultimately destroyed the capital city of Plymouth, causing major social and economic disruption.

Source : MVO , GVP.

Photos : Photovolcanica ( 2010 ), Wikipedia , ( 2006)

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