October 02 , 2016. EN. Ubinas , Colima , Kilauea , Bulusan .

Home / blog georges Vitton / October 02 , 2016. EN. Ubinas , Colima , Kilauea , Bulusan .

October 02 , 2016. EN. Ubinas , Colima , Kilauea , Bulusan .

October 02 , 2016.


Ubinas, Peru :

During the last period analyzed, the sustained increase in seismicity of the Ubinas volcano continued. The events that dominate the recording are fracture type earthquakes (VT) and LPs type earthquakes (fluid movement), followed by earthquakes hybrid type and Tremors.
The LP-type events that are related to the movement of fluids (water, steam and gas), remain at a moderate level of activity, about 21 LP / day. In this period, a peak power of 3 megajoules (MJ) of LP type of events, with an average of 0.1 MJ / day was observed.

 Between 09 and 14 September a sudden increase was observed in the number and energy of the hybrid-type events. This activity has been linked to the rise of new small contributions of magma within the volcanic system. In the second half, hybrid earthquakes recorded an average of 5 events per day, but decreased their level of seismic energy to low values.

VT type Earthquakes associated with rock fracturing, show an increase both in number and power. Such events (VT) show that the internal pressure in the volcano is slowly increasing. According to the seismic location map, seismicity VT is between 2 km and 5 km deep.

In numbers, during this period, it was observed an average of 210 VT / day, much higher than in the previous report (7 VT / day). The values of seismic energy VT, meanwhile, has to maintain moderate levels, with a daily average of 1.5 MJ / day with peaks of 4 and 8 MJ, observed on 13 and 22 September, respectively.

Seismic tremor activity type is always present and is recorded as short-term and low energy level events.


Location of earthquakes.
Over the past 15 days the VT type of activity was located in the volcanic cone on two main sources: the first source is observed up to 2 km deep and a second active source from 3 km to 5 km. All earthquakes related to two sources described are located between the crater and an area 500 meters to the west of this one. The maximum amplitude of this seismicity corresponds to a magnitude of 2.5 mL, undetectable by population.

Satellite surveillance.
Thermal and SO2 anomalies: The Mirova system (www.mirovaweb.it) detected a small thermal anomaly of 0.4 Mw on 20 September. In addition, the satellite system « EOS Aura » GSDM-NASA (http://so2.gsfc.nasa.gov/) detected no large anomalies in the density values of SO2 gas for this period.

Visual surveillance.
On 13 September, it began to be noted water vapor emissions and magmatic gases increasingly recurring, higher, which reached a height of 1300 meters above the base of the crater. These fumaroles are characterized as low density; however, they represent a change in the fumaroles emissions of Ubinas, which had not recorded such.


Source : IGP


Colima, Mexico :

Second observation overflight of the Colima volcano.

Today an helicopter of tactical squadron of government of Jalisco conducted an observation of the Colima volcano to monitor and analyze the development of the dome and the lava flow on the southern flank of the crater.
The dome has covered the entire surface of the crater and is higher than 20 meters of the edge .The lava reaches the eastern flank, and it was observed small landslides that could generate in the next hours a new spill, but the dome does not cover the northern and western edges. The existing lava spills has reached a length of about 500 meters.



Also continues the activity of exhalations of intense fumaroles at the top of the dome by several mouths which constantly emit abundant steam and volcanic gases, reaching a height of about 3500 meters above the crater. Until this report, there were about 150 small and medium events.
The intensity of the activity has not changed compared to yesterday, the preventive operation implemented by the UEPCB in surrounding communities is maintained.
In the canyons, large amounts of sand and fragments of rocks that were channeled through the upper basins that drain the volcano are observed. There is a risk that due to the rains, lahars affect the lower parts of the volcano.


The vigilance continues with constant monitoring of volcanic activity. Monitoring officials maintain constant vigilance in the village of Juan Barragan and surrounding communities located on the slopes of the volcano. People should not camp in the canyons that drain the volcano, do not approach the exclusion perimeters established.


Due to the increased activity of the Colima volcano, the government of the state of Colima, on the recommendation of the Scientific Advisory Committee, decided to evacuate preventively the communities of La Yerbabuena and La Becerrera.
The exclusion zone of the volcano has been increased from 12 km in the state of Colima. On the side of the state of Jalisco, it is maintained at 7.5 km.
Avoid staying in the ravines near the volcano, because of the probability of lahar after a rain, like pyroclastic flow. Avoid camping in the area.

Source :  UEPCB , gob.mx

Photos : Hernando Rivera , Christian Villionna , UEPCB .


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

Activity Summary:
Kilauea Volcano continues to erupt at its summit and at the Pu’u ‘O’o vent on its East Rift Zone. Summit inflationary continues. The lava lake surface is roughly 10m (33 ft) below the floor of Halema’uma’u Crater. The 61G lava flow continues to flow into the sea at Kamokuna. The flow poses no threat to nearby communities.



Summit Observations:
Summit tiltmeters continued to record the inflationary tilt that began on Thursday, although the rate of tilt is lower than it was on Thursday. The lava lake surface has continued to rise and currently stands at roughly 10 m (33 ft) below the rim of the Overlook Vent. Spattering from the lake surface continues to be visible by webcams located in the HVO observation tower and from the Jaggar Overlook during clear weather conditions. Webcam views of the lava lake can be found at the following webpage: http://hvo.wr.usgs.gov/cams/region_kism.php.

Summit seismicity is at typical levels this morning, while volcanic tremor amplitudes continued to fluctuate in association with lava lake spattering. Average daily summit sulfur dioxide emission rates ranged from 4000 to 6800 metric tons/day over the past week. GPS and InSAR data have recorded a long-term inflationary trend of the summit magma reservoir complex since 2010.



Pu’u ‘O’o Observations:
No significant changes are visible on webcam images, with persistent glow continuing at long-term sources within the crater. HVO fieldworkers at Pu’u ‘O’o Friday reported no significant changes since the last visit a couple of weeks ago. A tiltmeter on the north flank of Pu’u ‘O’o has recorded no substantial tilt during the past 24 hours. The sulfur dioxide emission rate from all East Rift Zone vents was about 310 metric tons/day when last measured on September 26.



Lava Flow Observations:
The 61g lava flow, extending southeast from Pu’u ‘O’o on Kilauea’s south flank continues to supply lava to the ocean at Kamokuna. The easternmost of the coastal entries was active Friday and the western one, inactive. Active breakouts occurred on the coastal plain about 2 km (1.2 mi) inland from ocean entry during the past week. Friday’s HVO field crew, however, reported that the breakouts were very sluggish and that this inland activity appeared to be dying out.

Source : HVO

Photos : HVO, David Ford , Bruce Omori .



Bulusan , Philippines :

BULUSAN VOLCANO BULLETIN 01 October 2016 8:00 A.M.

Bulusan Volcano’s seismic monitoring network recorded six (6) volcanic earthquakes during the past 24 hours. Voluminous emission of white to grayish plume from mid-slope, southeast vents was observed at around 06:50 AM to 12:40 PM. It rose up to 200 meters then crept downslope and drifted towards southeast. Light ash fell in barangays of San Rafael, San Roque and San Jose, municipality of Bulusan. Weak rumbling sound was heard at Brgy. San Roque and sulfurous smell was observed at Brgy. San Roque and Brgy San Rafael. Sulfur dioxide (SO2) emission was measured at an average of 33 tonnes/day on September 22, 2016. Precise leveling data obtained on August 16-25, 2016 indicated slight inflationary changes of the edifice relative to May 2016. Moreover, ground deformation data from continuous GPS measurements as of 03 September 2016 showed inflationary trends since July 2016.



Alert Level 1 (abnormal) remains in effect over Bulusan Volcano. This indicates that hydrothermal processes are underway beneath the volcano that may lead to more steam-driven eruptions. The 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.

Source : Phivolcs

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