August 14 , 2017. EN. Kilauea , Piton de la Fournaise , Soufrière Hills , Pacaya .

Home / blog georges Vitton / August 14 , 2017. EN. Kilauea , Piton de la Fournaise , Soufrière Hills , Pacaya .

August 14 , 2017. EN. Kilauea , Piton de la Fournaise , Soufrière Hills , Pacaya .

August 14 , 2017.

 

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:
Kīlauea Volcano continues to erupt at its summit and from the Puʻu ʻŌʻō vent on its East Rift Zone. The episode 61g lava flow from Puʻu ʻŌʻō continues to enter the ocean at Kamokuna. Surface flows are active above the pali and on the coastal plain. These flows pose no threat to nearby communities. There have been no major changes in seismicity or deformation across the volcano. At the summit, the lava lake level was about 30 m (98 ft) below the Overlook crater rim when measured last evening.

 

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

Summit Observations:
Summit tiltmeters continued to record an inflationary trend during the past day. The level of the lava lake rose at least 9 m (30 ft) to about 30 m (98 ft) below the Overlook crater rim between Friday evening and yesterday afternoon based on measurements of the lake surface. The lake level rose an additional few meters (yards) through this morning.Summit tremor continues to fluctuate in response to variations in lava lake spattering, and earthquakes occurred at normal, background rates. Summit sulfur dioxide emission rates remain high.

L’image contient peut-être : feu, nuit et plein air

Puʻu ʻŌʻō Observations:
Webcam images continue to show persistent glow from long-term sources at Puʻu ʻŌʻō. Seismic activity is at background levels, and ground tilt measurements in the past day showed a slight inflationary trend. The sulfur dioxide emission rate from the East Rift Zone vents has been steady over the past several months and remains significantly lower than the summit emission rate. The lava pond within the Puʻu ʻŌʻō crater continues to be active.

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

Lava Flow Observations:
The episode 61g flow is active and entering the ocean at Kamokuna. Several large cracks cut across the active lava delta parallel to the coastline, indicating seaward slumping of the delta’s leading edge. These cracks highlight the unstable nature of the delta and the potential of its sudden collapse into the sea. Surface lava flow activity persists on the upper portion of the flow field above the pali and on the coastal plain.

Source : HVO

Photos : Bruce Omori , David Ford ( 2016)

 

 

Piton de la Fournaise , La Réunion :

Activity Report for Sunday, August 13, 2017 at 4:00 pm (local time).

The eruption begun on July 14 at 00:50 local time continues. The volcanic tremor (surface eruptive intensity indicator), after experiencing a slight increase phase, has been stable for 24 hours (Figure 1).

 

Figure 1: Evolution of the RSAM (volcanic tremor and eruption intensity indicator) between 00:00 (20h UTC) on 14th July and 16h00 (12h00 UTC) on 13th August on the RVL seismic station, located on the flank South of the volcano. (© OVPF / IPGP)

– No volcano-tectonic earthquake was recorded under the summit craters during yesterday.
– A slight inflation (swelling) of the entire terminal cone of the volcano is always observed (<1 cm since the beginning of the eruption).

 

The bad weather conditions of the day yesterday and night (From 4h local to 4h local: 37 mm of rain on the rainfall station of OVPF near the Crater Chateau Fort) then the beginning of the day (12 mm of rain since 4H this morning in local time) did not allow this day of reconnaissance on the ground, or aerial, or to estimate the flow through the use of satellites.

Source : OVPF

Photo : Loic Proux ( 25/07)

 

Soufrière Hills , Montserrat :

MVO Weekly Report for the Period 4 to 11 August 2017

Activity at the Soufrière Hills Volcano remains low.

The seismic network recorded one rockfall and two volcano-tectonic earthquakes this week.
Measurements of the SO2 flux were made using the helicopter on 4 August. A total of seven traverses beneath the plume were carried out, with an average SO2 flux of 155 tonnes per day.
The smell of volcanic gases was noticeable at times during Thursday night and Friday morning when the gas plume was blown over inhabited areas.

 

 

Image associée


Pyroclastic flows can occur at any time without warning on any side of the volcano, including Gages from where they can travel rapidly into Plymouth. Tracks across the Belham Valley can be destroyed or heavily modified by flash flooding or lahars, and caution should be exercised crossing the valley during and after rainfall.
The Hazard Level is 1. There is no public access to Zone V, including Plymouth. Maritime Zones E and W are daytime transit only between sunrise and sunset (boats may sail through the zone but must not stop). Anyone who ignores these restrictions is liable to be prosecuted.

 

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

Photographs of the collapse to the northwest of Bluff, seen from the helicopter on August 9, 2017 (top) and February 17, 2016 (bottom). The photographs are not taken in exactly the same place, but they are roughly on the same scale, as can be seen by comparing the locations of the bushes and the rocks surrounding it.


The sinkhole at North West Bluff on the north coast of Montserrat has grown larger and was examined from the helicopter on 9 August. It is now approximately ten metres across, compared to five metres in February 2016. The enlargement appears to be restricted to the upper part of the sinkhole which indicates that the collapse has been from the surface and not from below. The public is reminded to avoid this area.

Source : MVO

Photos:  Photovolcanica , Adam Stinton / MVO.

 

Pacaya , Guatemala :

RESEARCH AND GEOPHYSICAL SERVICES
SPECIAL VULCANOLOGICAL BULLETIN, Guatemala August 13, 2017, 15:00. (Local hour).

INCREASE IN THE ACTIVITY OF THE PACAYA VOLCANO.

Activity type: Strombolian.
Morphology: Stratovolcan composite
Geographical location: 14 ° 22’50 « Latitude N; 90 ° 36’00 » Longitude W.
Height: 2,552 msnm.

During the past few hours, the Pacaya volcano has shown an increase in activity, as shown in the RSAM (Real-Time Sound Amplitude System) graph, increasing the number of explosions classified as mild explosions.

 

http://www.insivumeh.gob.gt:8060/PCG_SHZ_GI_01.2017081400.gif?v=1502690061

It maintains a range of strombolian explosions ranging from 5 to 7 per hour, generating incandescent pulses and visible incandescence mainly during the night. According to reports from the surrounding community, the explosions generate vibrations in the roof of the houses at a maximum distance of 3 kilometers from the volcanic perimeter.


This activity is the product of the accumulation of materials that has occurred in recent days due to collapse in the Mackenney crater, so it is not excluded that in the next hours or days a new flow of lava or explosions occur moderately to strong.

Source : Insivumeh

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