April 10, 2016. EN. Kilauea , Colima , Telica , Aira ( Sakurajima).

Home / blog georges Vitton / April 10, 2016. EN. Kilauea , Colima , Telica , Aira ( Sakurajima).

April 10, 2016. EN. Kilauea , Colima , Telica , Aira ( Sakurajima).

April 10 , 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 continues to erupt at both the summit, where there is a circulating lava lake, and from its East Rift Zone, where surface lava flows are active northeast of the Pu’u ‘O’o vent. The East Rift Zone lava flow currently poses no threat to nearby communities. The summit deflationary trend that started on April 4th continued during the past day; earthquake rates and seismic tremor have not changed significantly in the past 24 hours.


HVO geologist uses a laser rangefinder to measure the depth of the lava lake at the summit of Kilauea in the Overlook crater. The lake level was about 58 m (190 ft) below the crater rim this afternoon. In recent days the lake level has dropped about 35 m (115 ft) as tiltmeters at the summit have recorded a larger than usual deflationary trend. The spattering of the lava lake (middle right of photograph) was triggered by a small rockfall from the north crater wall directly above. Large rockfalls into the lake typically cause small explosions that hurl molten lava onto the rim of Halema’uma’u Crater, one of the hazards of this area  . The tripod in lower right supports one of the Web cams used to track activity of the lava lake.

Summit Observations:
Summit tiltmeters continued to record deflationary tilt during the past 24 hours and Kilauea’s summit lava lake level continued to drop. Yesterday morning the lake level was 52 m (170 ft) below the crater floor and this morning was measured about 58 m (190 ft) below the floor. This latest deflationary period has interrupted the longer-term inflationary trend of the summit, similar to previous deflation events. Seismic activity across the volcano has not changed significantly during the past day. Fluctuations in summit tremor amplitudes are related to spattering along the edges of the lava lake. The sulfur dioxide emission rate was about 1800 metric tons/day when last measured on April 3.


In comparison, the lava lake on January 7 2016, 35 meters under the floor of Halema’uma’u crater.

Pu’u ‘O’o Observations:
There were no observable changes at Pu’u ‘O’o during the past day. Outgassing continues from the spatter cones on the crater floor. A tiltmeter on the north flank of Pu’u ‘O’o continued to show deflationary tilt during the past 24 hours. Over a longer time period, GPS instruments that span Pu’u ‘O’o show the cone is spreading, which suggests the magma system beneath the vent is pressurizing; this current spreading trend began late in 2015. The sulfur dioxide emission rate from all East Rift Zone vents was about 240 metric tons/day when last measured on March 10.

June 27th Lava Flow Observations:
The webcam shows small breakouts scattered northeast of Pu’u ‘O’o, where they have been occurring for the past several months. A satellite image from April 3 showed the most distal of these breakouts was 7.6 km (4.7 mi) northeast of Pu’u ‘O’o.

Source : HVO.

Photos : HVO .


Colima , Mexique :

On Thursday, April 7 the staff of scientific research of the operational area of the State Unit of Civil Protection of Jalisco, on board the helicopter XC-VOY of the state government, conducted an observation flight over the Colima volcano to monitor and analyze the status and evolution of the volcanic crater.

During the flyby, it was observed growth of the inner crater from the inner crater observed on 29 February, which completely changed its structure.
The lava dome that was formed was reduced to rubble and products of rock and ash with continuous exhalations.
Similarly, the interior west of the main crater shows significant collapses of the steep walls, leaving deposits of avalanche.

The upper slopes, until December were covered with lava, they disappeared and are softened by the layer of ash.
Finally an important fumarole activity in the south and the southeast of the crater has been identified and it was found intense activity of exhalations that could reach 2,500 meters high.
Note that the exhalations of major proportions, pose no danger to the population and activities in the area which are located outside the high-risk perimeter established on the map of volcanic hazards.


After analyzing the information gathered, the following scenarios are considered:

1. A dome again occupies the crater and reshapes with lava flows such as those that occurred in the years 2014 and 2015.
2. The lava extruded on the upper slopes and can form pyroclastic flows type Merapi as July 11, 2015.
3. The dome is destroyed by one or more explosions, forming columns capable of generating eruptive pyroclastic flow.
4. the gradual process of destruction of the dome continues, caused by daily exhalations that occur on the volcano.

The UEPCB continues tracking and continuous monitoring of volcanic activity.
Similarly, the exclusion zone established to 7.5 kilometers of the crater and inciting people not to camp in the canyons that drain the volcano is maintained.


Source : UEPCB

Photos : Uepcb , Miguel Macias .


Telica , Nicaragua :

The volcano maintains a high micro-seismic activity, the lava is observed on the crater floor.
The gas emission is low and seismic amplitude in real time at low values, below 80 units.

On 09 April 2016 , technicians from the Nicaraguan Institute of Territorial Studies (INETER) have installed signaling signs to warn to domestic and foreign visitors of the unsuitable areas for excursions in the volcano.

Telica is one of the volcanoes that has been quite active in recent months, which have considered necessary to place the labels are in English and Spanish. In total there were nine signs installed, said Armando Saballos a specialist at Volcanology of INETER.


« In 2015 (the Telica volcan) was the most active of Nicaragua, and during the explosion that registered on November 22, it expelled lot of rocks of different sizes; reaching 1 kilometer away from the crater, « noted Saballos to official media. The Telica is a volcano in which there can be explosions at any time, so they asked tourists not to get too close to the crater.

« There is always volcanic activity; There is incandescence at the mouth of the Telica crater floor; at any time this can register a bigger explosion, « said the specialist.

Sources : Ineter , Elnuevodiaro.


Aira ( Sakurajima) , Japon :

31.593°N, 130.657°E
Elevation 1117 m

JMA reported that on 1 April an explosion at Aira Caldera’s Sakurajima volcano generated an ash plume that rose 2 km above Showa’s crater rim. An explosion at Minamidake summit crater also produced an ash plume which rose 800 m above its crater rim.



Three of five explosions detected at Showa during 1-4 April generated ash plumes that rose as high as 3.5 km, and ejected tephra as far as 1,300 m. Reports of falling tephra, 2 cm in diameter, came from a town 3 km away. At 0608 on 3 April an ash plume from an explosion rose 700 m above Minamidake. The Alert Level remained at 3 (on a 5-level scale).

Sources: Agence météorologique japonaise (JMA) , Gvp .

Photo : PBS TWING.com / Sherine France


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