October 05 , 2016. EN. Piton de la Fournaise , Copahue , Colima , Turrialba , Bulusan .

Home / blog georges Vitton / October 05 , 2016. EN. Piton de la Fournaise , Copahue , Colima , Turrialba , Bulusan .

October 05 , 2016. EN. Piton de la Fournaise , Copahue , Colima , Turrialba , Bulusan .

October 05 ,  2016.

 

Piton de la Fournaise , La Réunion :

Activity bulletin of Monday, October 3, 2016

Seismicity

Since the end of the eruption on September 18, 2016 until October 3, the OVPF recorded a total:

100 shallow volcano-tectonic earthquakes (0 2 km away under the surface) below the summit craters.

Since September 26, the frequency of earthquakes has decreased and is passed to less than 5 earthquakes per day.

 

Assessment of the superficial volcano-tectonic seismicity at Piton de la Fournaise from 18 September to 3 October (24:00 local time) 2016 (© OVPF / IPGP)
piton de la fournaise

Deformation

Following the slight deflation observed during the eruption, inflation (swelling) of the volcanic edifice is observed from September 18, meaning pressurization and accumulation of magma at depth. The rate of elongation summital (about 1 mm / day) is comparable to the rate observed in inflation phases in 2015 and 2016.
However since October 1 this inflation seemed to slow down .

Illustration of deformation summital for 6 months (eruptive phases are indicated in yellow). Is here represented a baseline (distance between two GPS receivers) through the Dolomieu crater from north to south (black raw data , in blue smoothed data over a week). An increase is synonymous of elongation and thus swelling of the volcano. (© OVPF / IPGP)

  Geochemistry of gas

The concentrations of H2S and SO2 in the fumaroles summital remain at high levels, above the noise background. To follow in the coming days.

Source : OVPF

Photos : Fournaise info

Copahue , Chile :

Special volcanic activity report (REAV)
Biobio Region. September 29 2016 0330 (local time).

The National Service of Geology and Mining (SERNAGEOMIN) describes the following information obtained by the National Network monitoring teams of volcano monitoring, processed and analyzed at the Volcanological Observatory of Southern Andes, interpretation center of SERNAGEOMIN data :
Thursday, September 29, 2016 at 02:39 local time (5:39 GMT), the monitoring stations near the Copahue volcano, recorded one (1) earthquake associated with rock fracturing (Volcano-tectonic). The event was located 6.2 km eastnortheast (ENE) of El Agrio crater.

 

copahue

The location obtained was as follows:
ORIGINAL TIME: 2:39 hl (GMT -3)
LATITUDE: 37 ° 50 ’90’ ‘South
LENGTH: 71 ° 06 ’47’ ‘West
DEPTH 4.9 km
LOCAL MAGNITUDE 3.1 (ML)

OBSERVATIONS:
At the time of publication of this report, there have been four aftershocks of lesser magnitude. No significant changes were observed in the surface activity recorded by IP cameras.
The level of volcanic alert level remains at yellow.
SERNAGEOMIN continuous online monitoring and report in a timely manner about changes in volcanic activity in the region.

 

Source : Sernageomin

 

Colima , Mexico :

After conducting a survey yesterday morning, the volcanology experts of the State Unit of Civil Protection and Fire staff found a considerable decrease in the activity of the volcano.

colima

Therefore, the government of Jalisco decided that families who have been evacuated can return home. Similarly, it is important to emphasize that as a preventive measure, the staff of the UEPCBJ continue to conduct oversight visits to villages settled on the slopes of the volcano. The same vigilance is maintained constantly 24/24 to the Observatory located in the volcano Nevado of Colima National Park.

Source : UEPCBJ

Photo : Javier Flores

 

Turrialba , Costa Rica :

Activity report of the Turrialba volcano
October 4, 2016 17.00

In the last 24 hours, the volcano ash emission has not stopped. The seismic signal suggests varying intensity phases, perhaps pulsating, until 4 am and after 4 pm the tremor occurred fairly steadily, with just more energy from 6:30 to 15 hours .
When visibility is permitted, a plume of 1000m above the top of the volcano (4300m of altitude) and which is dispersed to the North was observed

.

turrialba

Very low ash falls were recorded in San Jose (Curridabat), Heredia (San Rafael Concepción), and Limon (Siquirres and vicinity).

Due to weather conditions, particularly wind direction that moves the ash to the web camera located at the top of Turrialba, his performance can be interrupted constantly. If the wind direction is maintained, there will be communication problems with the camera.

 

Source : Ovsicori

Photo : Roxi

 

Bulusan , Philippines :

BULUSAN VOLCANO ADVISORY 05 October 2016 11:30 A.M.

In the early morning of 30 September, degassing at the fissure on the southeast summit slopes of Bulusan Volcano (12.7667°N, 124.0500°E) was reactivated, venting a low-lying steam plume with minor amounts of ash. For the past six days, a strong sulfuric odor has been reported in Brgy. Mapaso, Irosin, Sorsogon caused by the plumes creeping downslope to the inhabited southern slopes. Since 5 AM today, the Bulusan Volcano seismic network has recorded 15 volcanic earthquakes.

 

bulusan

In view of this, PHIVOLCS is advising all communities and local government units on the southern sector of Bulusan to take extra precautions against the effects of volcanic ash and SO2 being vented from the SE summit fissure. Short-term effects of SO2 exposure lead to irritation of eyes and respiratory tract, headaches, and cough. People with asthma may suffer airway constriction with SO2 inhalation. Other volcanic gases have the potential to cause loss of consciousness and in extreme cases, may lead to asphyxiation.

Alert Level 1 status still prevails over Bulusan Volcano. Local government units and the public are reminded that entry to the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited due to the possibility of sudden and hazardous steam-driven or phreatic eruptions, particularly at the current SE fissure. PHIVOLCS is closely monitoring the recent changes in the activity of Bulusan and will inform all stakeholders immediately should there be any developments in the current conditions of the volcano.

 

Source : Phivolcs

Photo : Archive

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