June 25 , 2016. EN. Fuego , Reventador , Kilauea .
June 25 , 2016.
Fuego , Guatemala :
Morphology: composite Stratovolcano
Geographical location: 14 ° 28’54 « N Latitude; 90 ° 52’54« W longitude
As reported by special bulletins, the activity of the Fuego volcano, remained at a higher level. Today, after 22 hours, it was observed and reported by the Volcanological Observatory of Fuego volcano (OVFGO), increased energy explosions,
generating constant fallout, sounds like locomotive sounds with sensitive shock waves 12 kilometers away, mainly to the southwest flank. The seismic station FG3 recorded an increase in seismic activity, mainly the constant tremors and explosions.
On the southeast side are observed descent of two lava flows in the direction of Las Lajas and El Jute ravines, about 2000 meters long. The eruption column reached 4800 m and headed to the West and the South West a distance of 15 km, while likely to increase its dispersion area.
For now, this eruption is effusive, but there is a chance that it increases in intensity in the coming hours, with the possibility of descent of pyroclastic flows mainly to the Southeast and the southern flank.
Therefore, the INSIVUMEH recommends:
Implementing vigilance it deems necessary due to the activity and be aware of the evolution of it.
At the Directorate General of Civil Aviation:
To take precautions with air traffic because there are ashes to a height of about 4800 meters. (15.748 feet) to the west, the southwest of the volcanic complex over a distance of 15 km. Also take into account the change in the wind direction.
Source : Insivumeh
Photo : Rosendo Morales
Reventador , Ecuador :
Surface activity of the volcano El Reventador:
The surface activity of the volcano El Reventador in recent months remained high. During the maintenance work of the monitoring network, between 08 and June 10, 2016, the Geophysical Institute staff observed a high eruptive activity of the volcano.
There is a continuous emission of volcanic gases and water vapor (height of the emission column: 800m NW direction) as shown in Figure 1.
Figure 1: View of the volcano from the SW flank. Emissions of gases and water vapor. (Photo: G. Viracucha IG-EPN).
The explosions produced are moderate, with sounds at the foot of the volcano, similar to noise of gunshots, and generate emission columns about 2 km altitude above the crater with the presence of moderate load of ashes.
These explosions are recurring events of the volcano, as shown on the seismogram for the day of 09/06/2016.
Figure 2: Column emission of 2 km with a moderate load of ash associated with the explosion, with its respective seismic and spectral signal, which took place at 6:13 on 9/6/2016. View of the volcano from the SW flank. (Photo: G. Viracucha IG-EPN).
Deposits generated due to the descent of pyroclastic flows associated with high explosive activity of the volcano, are clearly visibleas well as the descent of incandescent blocks ejected in the explosion. This phenomenon is recorded on all sides of the volcano, mainly on the south side and the north side of the volcanic edifice. (Figure 3).
Figure 3: a) view of the volcano from the SW flank. gas emissions and water vapor , b) deposits of pyroclastic flows. (Photo: G. Viracucha IG-EPN).
The vegetation inside the caldera, to the East and the North East showed the presence of fine gray ash. Because the wind mobilizes ash emitting column (Figure 4).
Figure 4: vegetation affected by ash falls. (Photo: G. Viracucha IG-EPN).
The activity of Reventador volcano remains at high levels, with permanent explosions, pyroclastic flows and recurring emissions with a moderate load of ashes scattered around the volcano without much impact on populated areas surrounding the volcano.
Source : IGEPN
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
Eruptions continue at Kilauea Volcano’s summit and East Rift Zone. The lava flow to the southeast of Pu’u’O’o continues to spread and advance, still posing no threat to nearby communities. The lava lake at Halema’uma’u Crater continues to circulate and spatter, and the lake level has risen slightly over the past day. Low rates of seismicity are observed across the volcano, and long-term deformation trends show continued inflation beneath the summit and uppermost Southwest Rift Zone. The June 27th lava flow northeast of Pu’u’O’o is no longer active.
Pu’u’O’o crater, with a large skylight high on its northeast flank.
Gentle inflationary tilt continues. The summit lava lake at Halema’uma’u continues to circulate and spatter. This morning, measurements show the lake surface is 29 m (~95 ft) below the adjacent crater floor. Low rates of seismicity in the summit caldera region are noted, with minor fluctuations in seismic tremor related to variations in lava lake circulation and spattering. Sulfur dioxide emissions from the summit vent over the past week ranged from 3,500 to 7,300 metric tons/day.
The lava pond in the western portion of Pu’u’O’o crater remains active, and has enlarged since our last observation. The pond today was about 50 m (160 ft) in diameter, with spattering along the western margin.
HVO webcams show several incandescent vents on the floor of Pu’u’O’o crater, as usual. Tilt measurements over the past day have been affected by rainfall. There are no significant changes in seismic activity at Pu’u’O’o. Sulfur dioxide emission rate from all East Rift Zone vents when last measured on June 22 was about 350 metric tons/day.
The leading edge of flow 61g is approaching the crest of Pulama Pali, and is moving over terrain with increasing slope. The gas plume from Pu’u’O’o is hugging the ground and blowing out to sea in the background.
Lava Flow Observations:
The active lava flow southeast of Pu’u’O’o continues to advance and spread. An HVO overflight yesterday revealed the flow is 5.1 km (3.2 miles) long, and the flow front was about 100 m (330 ft) from the northern boundary of the abandoned Royal Gardens subdivision. Over the past week the flow front has advanced at a rate of roughly 100 m per day (330 ft per day). Bright incandescence is visible in the overnight webcam views of the active lava flow field, marking lava tube skylights and scattered breakouts near the flow front.