April 29 , 2017. EN. Kilauea , Ebeko , Poas , Fuego .

Home / blog georges Vitton / April 29 , 2017. EN. Kilauea , Ebeko , Poas , Fuego .

April 29 , 2017. EN. Kilauea , Ebeko , Poas , Fuego .

April 29 , 2017.


Kilauea , Hawaï :

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:
Kīlauea Volcano continues to erupt at the summit and at Puʻu ʻŌʻō on the East Rift Zone. The episode 61g lava flow continues to enter the ocean at Kamokuna, where a small lava delta has been growing since late March. Surface flows remain active above the pali near Puʻu ʻŌʻō. These flows pose no threat to nearby communities. At the summit, the lava lake level is about 25 m (82 ft) below the floor of Halemaʻumaʻu Crater.

Summit Observations:
Tiltmeters at Kīlauea’s summit recorded the onset of deflationary tilt yesterday morning, and deflation continues this morning. The lava lake level has dropped with deflation, and was measured at about 25 m (82 ft) below the floor of Halemaʻumaʻu Crater this morning. Seismicity at the summit was within a typical range. Tremor amplitude continued to fluctuate with the vigor of lava lake spattering. Summit sulfur dioxide emission rates remained high.


Puʻu ʻŌʻō Observations:
Webcam images over the past 24 hours showed persistent glow at long-term sources within the Puʻu ʻŌʻō crater and from a small lava pond on the west side of the crater. Seismicity was relatively steady over the past 24 hours. A tiltmeter on Puʻu ʻŌʻō cone was affected by rain over the past day. The combined sulfur dioxide emission rate from all East Rift Zone vents has been steady over the past several months, and remains significantly lower than the summit emission rate.


Lava Flow Observations:
The episode 61g flow was still active, entering the ocean, and slowly building a lava delta at Kamokuna. HVO geologists in the field yesterday reported no major changes in the size of the lava delta over the preceding day; the reported collapse from yesterday was likely relatively small. The front of the delta was observed to have slumped slightly over the past day, indicating continued instability. No active surface flows were observed in webcam views on the coastal plain over the past day, but surface flows remained active on the upper portion of the 61g flow field above the pali, posing no threat to nearby communities at this time.

Source : HVO

Photos : Bruce Omori , David Ford .


Ebeko , Kamchatka :

50.69 N, 156.01 E;
Elevation 3792 ft (1156 m)
Aviation Color Code is ORANGE

A moderate gas-steam with some amount of ash activity of the volcano continues. Ash explosions up to 16,400 ft (5 km) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft and airport of Severo-Kurilsk.



Explosions sent ash simultaneously from Active and Middle craters of Ebeko volcano on 15 April, 2017.
A moderate explosive activity of the volcano continues. According to the data by observers from Severo-Kurilsk (Paramushir Island, Northern Kuriles), several ash bursts up to 2.1 km a.s.l. occurred on 23-26 April; weak ashfalls were noted at Severo-Kurilsk on 25 April. Satellite data by KVERT showed the volcano was quiet or obscured by clouds.

Source : Kvert.

Photo :  T. Kotenko, IVS FEB RAS , 15/4/2017


Poas , Costa Rica :

Activity report of the Poas volcano, 28 April 2017, updated at 11: 00 hours.

During the last 24 hours, we observed VTS and LPs earthquakes as well as a small amplitude tremor. The deformation shows rapid inflation. Sounds of « jets » have been reported in the last few days. In the active crater of Poas, the formation of a cone due to the ejection of fragments of lava at low altitude, ash and lake sediments continues.
The activity should continue.


L’image contient peut-être : montagne, nuage, ciel, plein air et nature
25 April 2017. 14:10
During the day, volcanologists Geoffroy Avard, Monserrat Cascante, Jorge Brenes, Javier Pacheco and Marino Protti conducted sampling and maintenance work. On the image we see a small eruption and the constant presence of a steam column that is observed from various parts of the country.

An odor of sulfur is reported in Poro, Grecia, San Juanillo de Naranjo and Alto Palomo.

Source : Ovsicori


Fuego , Guatemala :


Persistence of low white fumaroles at a height of approximately 4,400 meters (14,436 feet) which are scattered to the northwest, west and southwest.


Low to moderate explosions, 3 to 5 per hour, which generate ash plumes that reach a height of about 4,400 to 4,800 meters (14,436 to 15,748 feet) that travel more than 10 km to the northwest, West and South-West are recorded. Incandescent pulses at a height of 100-200 meters above the crater generate weak to moderate avalanches on the crater’s outline. These explosions are accompanied by weak to moderate rumblings.

Source : Insivumeh

Photo : Archive

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