June 17, 2016. EN . Pacaya , Turrialba , Klyuchevskoy , Waimangu Geothermal Area.

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June 17, 2016. EN . Pacaya , Turrialba , Klyuchevskoy , Waimangu Geothermal Area.

June 17 , 2016.

 

Pacaya , Guatemala :

SPECIAL BULLETIN Volcanological

increased activity of the volcano PACAYA

Type: Strombolian
Morphology: composite Stratovolcano
Geographical location: 14 ° 22 ‘50 « N Latitude; 90 ° 36’00«  W. Longitude
Height: 2552 m.

 

pacaya

The diagram eruption of volcano Pacaya showed changes in the last hours, with an increase in RSAM measurements (Measuring the Magnitude of Earthquakes in real time). It has been observed increased activity in the crater Mackenney where it was possible to hear some rumblings sometimes accompanied by small explosions .It was also noted the increase in crater glow at night.
Seismic activity recorded by the PCG station is mainly associated with tremors (internal vibration) generated by the ascent of magma to the surface.
This activity will be increasing in the coming hours and produce lava flows and Strombolian explosions of greater magnitude.

Activity:
Low expulsions with blue and white fumaroles degassing is observed, this plume has an approximate height of 100 meters (328ft) above the crater and spreads south.

Therefore the INSIVUMEH recommends:
A CONRED to review their emergency plans and to be aware of changes in the activity of the Pacaya volcano.
At the DIRECTORATE OF CIVIL AVIATION
 Be aware of of the evolution of the Pacaya volcano, because it can generate explosions and ash plumes.

 

Source : Insivumeh

Photo : Photovolcanica

 

 

Turrialba , Costa Rica :

Activity report of the Turrialba volcano
Updated: June 16, 2016

After the passive emission between 1h45 and 7h15 of June 16, 2016, there have been other small eruptions at 8h05 and one another at 15h57. The ashes do not exceed 500 meters above the active crater. At the moment, the volcano emits a plume rich into vapor with a very small amount of ash.
Depending on weather stations IMN (Volcano Turrialba and Irazu) the wind direction was between the West and Northwest.

 

A smell of sulfur is reported in San Jorge de Moravia, San Luis Santo Domingo Tibás.
So far it is not reported ash fall in the towns around the volcano, or the greater metropolitan area, with the exception of a few isolated cases in the morning in San Isidro de Heredia region

The OVSICORI-A will publish two daily reports on the activity of the volcano Turrialba, at 9:00 and 17:00.

 

turrialba

Definitions:

Volcanic tremor: Seismic signal generated by the vibration produced by the passage of fluids (gas, water, or magma) into cracks and passages inside the volcano.
Earthquake LP: transitory seismic signal « temporary or short durations » produced by the passage of fluids (gas, water, or magma) through narrow channels, cracks and cavities.

 

Source : Ovsicori

Photos : H Moya ,

 

Klyuchevskoy , Kamchatka :

56.06 N, 160.64 E;
Elevation 15580 ft (4750 m)
Aviation Color Code is ORANGE

Explosive-effusive eruption of the volcano continues. Ash explosions up to 19,700-26,240 ft (6-8 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.

 

klyuchevskoy
The lava flow continues to flow through the chute Apahonchisky. In the picture we can see that the source of the migration is to crack a little up the hill.


Explosive-effusive eruption of the volcano continues. According to video and satellite data, the lava flow continues to effusing on the south-eastern flank of the volcano. Satellite data by KVERT showed an ash plume extended up to 47 km to the west from the volcano on June 13, and an intensive thermal anomaly over the volcano.

Source : Kvert , Volkstat ru.

Photo : Igor Baturin

 

 

Waimangu Geothermal Area, New Zealand :

 

Small hydrothermal eruption at Waimangu: Mud Rift reactivates

Around May 17-20 the Mud Rift feature at Waimangu Geothermal area erupted. The Mud Rift is a 36 m long, 5-6 m wide and 15 m deep geothermal vent in Raupo Pond Crater, one of the craters formed in June 1886. It is an isolated area and this is the first known eruption since 1981. The Mud Rift formed in 1906 and was last active in 1978/79 and 1981. However when visited last week the hottest temperature on the floor of the rift was only 13.7 ˚C in a pool of brown water.

waimangu

View of the middle vent area showing ejected blocks, sands and dieing trees

 

The May 2016 eruption was from 3 sources, the most active been the two smaller ‘vents/collapse pits’ to the west of the main Mud Rift. These were formed in 1981. We have not been able to see anything on our nearest seismographs. It appears to be mainly steam and fine sands-muds involved. There is lots of evidence of fluids flooding in to rift, especially at the west end. Vegetation nearby is stressed and browning off, but is not damaged by the eruption (no broken limbs etc). There is also some evidence of collapse around the edges of the two smaller vents. Over all it appears as a very short lived event, steam driven with a lot of water also involved (think muddy geyser).

There are two large crater lakes nearby; Inferno Crater Lake and Frying Pan Lake. These are jointly monitoring by GeoNet and the BOP and Waikato Regional Council’s. Inferno Crater is remarkable in that the water level fluctuates through 6-9 meters and over flows about every 40 days. Meanwhile Frying Pan Lake is always flowing, today around 80 litres per sec. In the 1980’s it was closer to 100 litres per sec. These crater lakes display a unique interaction, as the water level of Inferno falls the flow from Frying Pan increases and vice versa. This is termed ‘exchange of function’ and is often observed in hot springs.

Waimangu

View of Raupo Pond Crater showing damage trees

From January through to early April 2016 Inferno Crater Lake experienced a ‘high stand’, many of these have occurred since the 1970’s when detailed monitoring started of the lakes. During these times more steam energy is present in the Inferno portion of the geothermal system. This was particularily noticed in 1978/79 and 1981. It would appear this increase of steam through the system was responsible for driving the reactivation of the Mud Rift in May 2016. We have located 47 earthquakes within about 10 km of Waimangu in the last year. In the last 6 years we have located 388, which is typically 64 per year.

Source : Geonet.

 

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