December 19 , 2016. EN. Kilauea , Popocatepetl , Turrialba .

Home / blog georges Vitton / December 19 , 2016. EN. Kilauea , Popocatepetl , Turrialba .

December 19 , 2016. EN. Kilauea , Popocatepetl , Turrialba .

December 19 , 2016.


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 in two locations. The episode 61g lava flow from Pu’u ‘O’o in the East Rift Zone is entering the ocean at Kamokuna. A younger branch of the flow is active near Pu’u ‘O’o and advancing slowly east. These lava flows pose no threat to nearby communities at this time. The lava lake at Kilauea’s summit continues to circulate, with periods of spattering occurring sporadically. Inflationary tilt at the Summit continues along with a rise in lava lake level. Seismic activity continues at a low rate overall, with a magnitude 4.5 felt earthquake occurring this morning 59 km (37 mi) south of the island.



Summit Observations:
Last week, the average daily sulfur dioxide emission rate at the summit was approximately 5,000 metric tons/day, but has not been measurable over the past week. Summit seismic activity remains low overall. The summit continued to inflate over the past day. The level of the summit lava lake was approximately 25 m (82 ft) below the vent rim as measured three days ago. The amplitude of summit seismic tremor fluctuated as spattering in the lake waxed and waned.


Pu’u ‘O’o Observations:
There were no obvious changes at Pu’u ‘O’o. Webcam views show persistent glow from sources within the crater and from a vent high on the northeast flank of the cone. The tiltmeter on the northwest flank of the cone showed a slight increase in tilt over the past day. The sulfur dioxide emission rate from all East Rift Zone vents was about 340 metric tons/day when last measured on November 30. Seismicity in the Pu’u ‘O’o area continues at low levels.


Lava Flow Observations:
The episode 61g flow is still active and entering the ocean at Kamokuna, where activity has been concentrated on the east side of the delta. In addition, a younger branch of the episode 61g vent remains active east of Pu’u ‘O’o and is advancing slowly east at a rate of only a few tens of meters (yards) per day. A small breakout near the vent continues this morning and is mostly covering earlier episode 61g lava. The episode 61g flow poses no threat to nearby communities at this time.

Source : HVO

Photos : Bruce Omori , David Ford , HVO


Popocatepetl , Mexico :

December 18th 11:10 am (17:10 GMT on December 18)

Over the past 24 hours, through the seismic recordings of the Popocatepetl volcano monitoring system, 55 low-intensity exhalations accompanied by water vapor, gas and small amounts of ash have been identified. At 3:28 am today a small explosion has been recorded. There were also 266 minutes of low harmonic tremor amplitude and a tectonic volcano earthquake, located in the southeast sector with a magnitude of M 2.4.


During the night and early in morning, a glow was observed in the crater area.

At the time of this report, there was no visibility, but during the early hours of the morning there was a steady and continuous emission of steam and gas to the north.

On 12 December, was organized with the support of the federal police, an overflight recognition of the volcano Popocatepetl. There were favorable weather conditions to make observations. From observations made during this flight, it could be observed that dome 71, which began to be set up on 29 and 30 November, almost completely filled the inner crater, reaching a diameter of 280 m and a thickness of at least 50 m.


The depth of the inner crater floor relative to the main crater was reduced to approximately 15-20 m. The volume of the dome was estimated at about 3 million cubic meters. It is likely that in the coming days or weeks, this dome will be destroyed by one or more explosions similar to those observed in February and March 2015.

The volcanic alert semaphore Popocatepetl is located in Amarillo Phase 2.

Source : Cenapred


Turrialba , Costa Rica :

Turrialba Volcano Activity Report – December 18, 2016

The eruptive activity of the volcano was observed with low intensity alternating low ash emissions and degassing, the recorded seismic signal, such as low frequency earthquakes and tremors are also of low intensity.


L’image contient peut-être : ciel, plein air et nature

The height of the plume does not exceed 300 meters above the crater and the direction of the wind has changed from northwest to southwest.
Towards midnight yesterday and early today ash falls and a strong odor of sulfur has been reported in Coronado, Moravia, Tibás, Guadalupe, Ipís, San Pedro and Curridabat.

Source : Ovsicori

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