February 15 , 2017. EN. Piton de la Fournaise , Kilauea , Pacaya , Kanlaon .
February 15 , 2017.
Piton de la Fournaise , La Réunion :
The eruption begun on January 31, 2017 at 7:40 pm local time continues. The volcanic tremor (indicator of surface eruptive intensity) remains at a high intensity level (Figure 1).
Figure 1: Evolution of RSAM (volcanic tremor and eruption intensity indicator) between January 31st and February 14th (16h local time) on the seismic station of Château Fort, located on the southern flank of the volcano. (© OVPF / IPGP)
– No seismicity was recorded during the day under the summit of Piton de la Fournaise.
– No significant deformation has been observed in the last few days.
Most of the activity is now done in lava tunnel, the surface flows are therefore low, with estimates <1 m3 / s according to the satellite data of the HOTVOLC platform (OPGC – Clermont Ferrand) .
The activity is visible on the eruptive cone, which now measures more than 30 meters in height!
The escaping layer of lava was measured at 14 m thickness and the regular flow of the lava is of the order of 10 m3 / s. Since the beginning of this eruption (January 31st), the volcanology observatory estimates the amount of lava sprayed by the Furnace at a range of 5 to 8 million m3.
The front of the flow is now located at the top of the great slopes, about 6 km from the sea, but it is a priori unlikely that it descends lower.
According to the scientists, the year 2017 could be very active because « Several magmatic tanks are located under the Piton de la Fournaise, there can be quick stops by the obstruction of the duct but also of the equally fast recoveries on another site or the same current site « .
Source : OVPF, Fournaise info .
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
Kilauea Volcano continues to erupt at its summit and East Rift Zone. Lava continues to enter the ocean at Kamokuna and surface flows remain active near the vent at Pu’u ‘O’o as well on the coastal plain south of Pu’u ‘O’o . These lava flows currently pose no threat to nearby communities. At the summit, DI inflationary tilt continued and the lava lake surface to about 20 m (65 ft) below the floor of Halema’uma’u crater this morning.
Summit tiltmeters recorded continuing DI inflation. The lava lake surface rose along with the tilt and was measured at about 20 m (65 ft) below the floor of Halema’uma’u crater this morning. Seismicity rates were at background levels and tremor values fluctuated in response to changing lava lake circulation, spattering, and rockfalls. Sulfur dioxide emission rates ranged from about 4,600 to 5,800 metric tons/day over the past week, when measurements were possible during trade wind conditions.
Pu’u ‘O’o Observations:
Webcam images show persistent glow in long-term sources within the crater. There was no significant change seismicity rate during the past day, while the tiltmeter on Pu’u ‘O’o cone recorded slight inflation. The sulfur dioxide emission rate from all East Rift Zone vents was about 200 metric tons/day when last measured on January 30.
Lava Flow Observations:
The episode 61g lava flow remained active and is entering the ocean at Kamokuna. At Pu’u ‘O’o, surface flows are occurring within about 2.4 km (1.5 mi) of the 61g vent and also on the lower 61g flow field at the coastal plain. These flows pose no threat to nearby communities at this time.
As a strong caution to visitors viewing the ocean entry (where lava meets the sea), there are additional significant hazards besides walking on uneven surfaces and around unstable, extremely steep sea cliffs. Venturing too close to an ocean entry on land or the ocean exposes you to flying debris created by the explosive interaction between lava and water. Also, the new land created is unstable because it is built on unconsolidated lava fragments and sand. This loose material can easily be eroded away by surf, causing the new land to become unsupported and slide into the sea. In several instances, such collapses, once started, have also incorporated parts of the older sea cliff. This occurred most recently on December 31. Further collapses of the sea cliff have been occurring since then, most recently on February 11. Additionally, the interaction of lava with the ocean creates a corrosive seawater plume laden with hydrochloric acid and fine volcanic particles that can irritate the skin, eyes, and lungs.
Source : HVO
Photos : David Ford , Bruce Omori.
Pacaya , Guatemala :
As it has been informed in recent days, the eruptive behavior of the Pacaya volcano remains, showing the advance of a lava flow north-east, which is mainly observed during the night hours.
Currently, it is estimated that the lava flow has a width of 20 meters and an approximate length of 50 meters. An increase in the length of the variable flow has been observed over the last few days, depending on whether the feeding of the material casting increases or decreases. It can not be ruled out the possibility that the flow will still advance in the next hours or days.
This activity is the product of the accumulation of materials and the formation of a cone, which constantly generates incandescent pulses at heights of 25 to 50 m, which has filled a large part of the crater, causing an overflow from the part of the crater where the fracture of the eruption of 2010 is, in the direction of the crater of Cerro Chino.
This new cycle of activity involves the risk of generating moderate to severe explosions at over 300m above the crater.
Source : Insivumeh
Photo : Th. Boeckel
Kanlaon, Philippines :
KANLAON VOLCANO BULLETIN 15 February 2017 08:00 A.M.
Kanlaon Volcano’s seismic monitoring network recorded two (2) volcanic earthquakes during the past 24 hours. Steaming activity could not be observed due to thick clouds covering the summit. Sulfur dioxide (SO2) emission was measured at an average of 12 tonnes/day on February 1, 2017. Ground deformation data from continuous GPS measurements as of January 27, 2017 indicated no significant change of the Kanlaon edifice since August 2016.
Alert Level 1 status remains in effect over Kanlaon Volcano, which means that it is currently in a state of unrest probably driven by hydrothermal processes that could generate more minor eruptions. The local government units and the public are reminded that entry into the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited due to the further possibilities of sudden and hazardous steam-driven or minor ash eruptions.
Source : Phivolcs