July 03 , 2016. EN. Planchón -Peteroa , Yellowstone , Chaparrastique ( San Miguel) , Kilauea .

Home / blog georges Vitton / July 03 , 2016. EN. Planchón -Peteroa , Yellowstone , Chaparrastique ( San Miguel) , Kilauea .

July 03 , 2016. EN. Planchón -Peteroa , Yellowstone , Chaparrastique ( San Miguel) , Kilauea .

July 03 , 2016.


Planchón -Peteroa , Chile :

Special volcanic activity report (REAV)
Maule Region. 28 JUIN 2016 10:02 p.m. (local time).

The National Geology and Mining Service (SERNAGEOMIN) describes the following information obtained through the monitoring equipment processed and analyzed by the Volcanological Observatory of Southern Andes, to the central data interpretation of the national monitoring network of the volcano Planchón -Peteroa:
Today, Tuesday, June 28, 2016 on 22:02 local time (2:02 GMT), the monitoring stations near the volcanic complex Planchón -Peteroa, recorded one (1) earthquake associated with rock fracturing (volcano tectonics), located 4.3 km north-northeast (ENE) of the main crater.



The location obtained was as follows:
ORIGINAL TIME: 10:02 p.m. hl (UTC -4)
LATITUDE: 35 ° 12’10.20 « South
LENGTH: 70 ° 33’21.60 « West
DEPTH 4.8 km

1. No surface activity is recorded on the volcano by IP cameras.
2. No other event of the same type or signs of an increased activity after the earthquake recorded.
SERNAGEOMIN continuous online monitoring and report timely to the changes in volcanic activity in the region.


07/02/2016. The National Geology and Mining Service (SERNAGEOMIN), in charge of the National Network of volcanic surveillance of Chile (RNVV) and the Volcanological Observatory of Southern Andes (OVDAS) reported the technical level alert yellow for the volcanic complex Planchón -Peteroa, located in the municipality of Romeral, province of Curicó, Maule Region of Chile. The nearest cities are Los Queñes and Paso Vergara.
The technical institution said that the result of this decision is the increased seismic activity observed for a few days, concentrated in an area immediately below the main crater. This would imply a fracture system activation process which could then facilitate the rise of magma and thus trigger an eruptive episode in weeks / months.


« Although the events recorded have low energy levels and are detected by using sensitive surveillance system installed on the volcano, increased seismicity and location of these events suggests changes in the level activity base of the volcano and the result was the modification of the alert level to yellow level, « said the national director of SERNAGEOMIN Rodrigo Alvarez Seguel.
For its part, the mayor of the Maule region, Pablo Donoso Meza, said: « We are in constant coordination with the SERNAGEOMIN the Onemi and agencies to monitor the volcano’s activity. »

In addition, Ricardo Toro, National Director of ONEMI said that « the whole declaration of the Civil Protection system for yellow alert is activated, both at community, provincial and regional levels. In addition, all have prepared contingency plans, and the necessary monitoring of the the volcanic complex is increased, both locally and instrumentally.  »

Peteroa Planchón monitoring is done by six seismic stations, infrasound sensor, 3 IP cameras, 2 inclinometers.

Source : Sernageomin

Photo : minutoya.com , T13 cl.



Yellowstone , United-States :

44°25’48 » N 110°40’12 » W,
Summit Elevation 9203 ft (2805 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN

During June 2016, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 70 earthquakes were located in the Yellowstone National Park (YNP) region. The largest event was a micro earthquake of magnitude 2.9 on June 30, 03:41 AM MDT, located 17 miles southwest of West Thumb, WY.

June 2016 seismicity did not include any earthquake swarms. Yellowstone earthquake activity in June is at low background levels.


Ground deformation:
Uplift at the Norris GPS station (NRWY), which began in early 2016, continues at a rate of ~5 cm/yr. The pattern of ground deformation in the Norris area resembles that observed from late 2013 through early 2014, although the present uplift rate is less than half of what it was before. Caldera GPS stations continue to record slow subsidence at a rate of ~1.5 cm/yr.

Current deformation patterns at Yellowstone remain within historical norms.

An example of GPS data can be found at http://www.unavco.org/instrumentation/networks/status/pbo/data/WLWY (click on Static Plots / Time Series)

The Yellowstone Volcano Observatory (YVO) provides long-term monitoring of volcanic and earthquake activity in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.

Source : YVO.


Chaparrastique , El Salvador :

The volcano Chaparrastique has decreased its degassing.

Since the images recorded by the webcam, it is obvious that the volcano Chaparrastique has decreased the degassing of its crater. Small pulses of gases coming out of the crater , which do not exceed 100 meters, which are dispersed in the Southwest are observed. Local observers reported a slight smell of sulfur, however, the damage to vegetation located in the westsouthwest of the crater, under the effect of acid rain remain.


Afficher l'image d'origine

The volcano continues to emit magmatic gases, primarily water vapor and sulfur dioxide. As of June 19 these values have fluctuated but remain near or above 1000 tonnes / day.

In the last 24 hours, the seismic vibration of the volcano, recorded by the seismic station VSM located at 1700 m on the northern flank of the volcano has fluctuated between 98 and 173 RSAM units per hour, with an average of 144 units. We continue to see a gradual decompression suggesting a downward trend in the system.



Seismic vibrations of the volcano recorded by the station VSM during the period May to July 2016.

The air quality station installed in La Piedra, located three kilometers west of the volcano’s crater, measured concentrations of sulfur dioxide in the air, which were between 0.013 and 0.160 parts per million ( ppm). The recorded data show that during most of the recording, there was the requirement of « good » air.



The gas emitted from the crater of the volcano are transported by the wind direction and the nearest residents volcano communities perceive a smell of sulfur, therefore, the use of masks or wet tissues is recommended, as well as leaving the affected area.
The degassing of the volcano continues but declined, however, continues therefore the recommendation of not to climb to the top of the volcanic cone, because of the damage that the magmatic gases cause to the respiratory system, and there may be a sudden explosion.
MARN continues to monitor the volcano maintains close communication with the General Directorate of Civil Protection and local observers.

 Source : Marn 

Photos : emisorasunidas.com, Proteccion Civil ES.



Kilauea , Hawai :

19°25’16 » N 155°17’13 » W,
Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE


The active lava flow from Puʻu ʻŌʻō was on the slope near the top of the Pūlama pali today, one of the steep escarpments on Kīlauea’s southeast flank, and had transitioned into a channelized ʻaʻā flow. The view is to the northwest

Activity Summary:
Eruptions continue at Kilauea Volcano’s summit and East Rift Zone. The lava flow to the southeast of Pu’u ‘O’o continues to be active and does not pose a threat to nearby communities. The lava lake at Halema’uma’u Crater continues to circulate and spatter, and the lake level rose several meters (yards) during the past 24 hours. Low rates of seismicity are observed across the volcano.



Summit Observations:
Tiltmeters at the summit continued to record an inflationary trend during the past 24 hours, and the level of the summit lava lake at Halema’uma’u rose by several meters (yards). This morning the lava level is about 30 m (98 ft) below the Halema’uma’u Crater floor based on thermal webcam images. Low rates of seismicity in the summit caldera region are noted, with minor fluctuations in seismic tremor related to variations in lava lake circulation and spattering. Sulfur dioxide emissions from the summit vent over the past week ranged from 3,500 to 6,200 metric tons/day.


Pu’u ‘O’o Observations:
HVO webcams show several incandescent vents on the floor of Pu’u ‘O’o  crater, as usual. There are no significant changes in seismic activity at Pu’u ‘O’o. A tiltmeter on the north flank of Pu’u ‘O’o has recorded very little change during the past few days. Sulfur dioxide emission rate from all East Rift Zone vents when last measured on June 27 was about 320 metric tons/day.



Lava Flow Observations:
The active lava flow southeast of Pu’u ‘O’o continued to be active during the past 24 hours. On Thursday afternoon, geologists reported the flow front was about 150 m beyond the base of the pali along the western boundary of the abandoned Royal Gardens subdivision; the flow was about 7.6 km (4.7 miles) long as measured along the axis of the tube. Bright incandescence is visible in the overnight webcam views of the active lava flow field, marking lava tube skylights and activity on the pali.

Source : HVO

Photos : HVO , Bruce Omori

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