May 06 , 2017. EN. Fuego , Poas , Copahue , Cleveland .
May 06 , 2017.
Fuego , Guatemala :
Updated on 05/05/2017
The eruption number 4 is always maintained with the same energy, raising plumes of ash thick to about 5000 m. (16,405 feet), traveling more than 50 kilometers to the south, southwest, and west, resulting in ash falls on San Pedro Yepocapa, Morelia, Hagia Sophia, El Porvenir, Palo Verde And others on this side, and also on Santa Lucia Cotzumalguapa, Siquinalá, San Andres Osuna, Chuchu, Reunion. This is due to the pyroclastic flows that descend into the canyons Trinidad, Las Lajas, Ceniza, Santa Teresa, which implies the communities of these flanks.
This eruption is recorded as the strongest since 2012, and forced the evacuation of the village of Sangre de Cristo (west side). In the ravines affected, large quantities of material are deposited which will constitute a danger in the coming days because these debris, with the rains will form mudslides of volcanic origin (lahars) which can cause damage to the road infrastructures and causing flooding on the south and southwest sides of the Fuego volcano.
Therefore, INSIVUMEH recommends:
TO THE CONRED: This eruption is one of the strongest of the last years, so it is necessary to implement an orange state of alert and to continue awaiting the evolution of the eruption.
TO CIVIL AVIATION DIRECTION: We recommend that you take precautions for air traffic because the ash column has reached a height of 5,000 meters (16,405 feet) but the wind is variable and likely to spread the ash in d ‘other directions.
TOURISM AND TOURISM AGENCIES IN GENERAL: This is one of the biggest eruptions recorded on the volcano Fuego, which expels ballistic materials up to 5 kilometers, so it is not relevant to climb the flanks of the volcano Fuego and the Acatenango.
Update of 06/05/2017
The fourth eruption of the Fuego ended approximately 24 hours after the beginning of the increase in volcano activity, according to the FG3 seismograms and the volcano observatory. There are mainly fine particles of ash from the eruption suspended in the environment, mainly on the south and south-east sides of the volcano, which are expected to disappear completely within the next few hours.
This eruptive phase was one of the most violent occurrences recorded in the last 5 years and is classified as a vulcanian eruption with an explosion index of 3 (IEV 3). Pyroclastic deposits remain in the ravines of Santa Teresa, Trinidad, Las Lajas and Ceniza, as well as lava flows to the canyons of Santa Teresa and Las Lajas.
These large quantities of materials will constitute a danger in the coming days because these debris, together with the rains, will form mudslides of volcanic origin (lahars) which can cause damage to the road infrastructure and cause flooding on the flanks South and South-West of the Fuego volcano.
Source : INSIVUMEH
Photos : Twitter
Poas , Costa Rica :
Activity report of the Poas Volcano, 5 May 2017, updated at 11: 30 a.m.
Volcanic activity in the last 24 hours
During the last 24 hours, Poas volcano seismographs have continued to record low amplitude seismic tremor signals from variable to moderate values. Long-term (LPs), and volcano-tectonic (VTS) earthquakes always appear on the seismograms discretely. The Webs of the National Seismology Network (NSN) show persistent degassing of water vapor, magmatic gases and aerosols at the southern end of the acid lake where the former pyroclastic cone was destroyed by the April eruptions 2017. The surface of the acid lake shows a strong evaporation. The intense degassing in the area between the lake and the old cone is due to the interaction of the water with fresh magma that has risen to the surface below the old cone. No phreatic eruptions have been observed recently.
The OVSICORI-A works on the recovery of the webcam which was destroyed by Easter eruptions.
During the day, the plume of steam, gas and aerosols was dispersed mainly to the west and southwest, according to data from the National Institute of Meteorology (MNI) and the modeling of gas dispersion and Aerosols carried out with the computer code AERMOD. According to the modeling, the materials emitted by the volcano could affect areas such as Cabuyal, Naranjo, San Ramon, Esquipulas, Palmares, Cirri, Grecia, Tacares, Poas Volcano National Park, Zarcero, Bajos del Toro, Altura, Finca Inés, Ciudad Quesada, San José de la Montaña, Aguas Zarcas, among other places nearby. Sulfur dioxide gas (SO2) has been detected by the IMO instrument, NASA satellite AURA, since April 10, 2017. A cloud of this irritant gas is concentrated on the center and northern Costa Rica. On 4 May 2017 a cloud of SO2 was detected again by IMO-AURA while an aerosol cloud was detected by the Terra-Modis satellite. Most of the SO2 and aerosols originate from the Poas volcano, which in the last few hours has been scattered west-northwest. In the last few hours, there has been reported a smell of sulfur southwest of the volcano, Barva de Heredia. The Poas plume can sometimes be seen from Heredia, San José, Alajuela.
In the present conditions of the Poas volcano, more short – term eruptions are to be expected. The OVSICORI-A remains vigilant on the activity of the volcanoes.
Source : Ovsicori
Copahue , Chile :
During this period, 72 seismic events, of which seventy (67) were classified as volcano tectonic (VT), associated with fracturing processes of rigid materials were recorded. Similarly, five (5) events were identified as long-period earthquakes, associated with fluid dynamics within the volcano, which exhibited a maximal reduced displacement (DR) value of 0.3 Cm2.
With regard to seismic activity of the VT type, the local quantities (ML) are less than or equal to M 2.7. The most energetic event was located north-north-west, 5.3 km from the crater El Agrio, with a depth of 1.3 km.
During this period, a constant and very small tremor signal was recorded, mainly associated with the exit of gases from the El Agrio crater, to a lesser extent than in previous months. The values of this signal have an oscillating DRC of about 0.5 cm 2. The dominant frequency is distinguished in predominant bands, one around 0.6 Hz and the other is concentrated in a bandwidth between 1.2 and 1.6 HZ
From the data obtained from four (4) GNSS stations measuring the deformation of the volcano surface, low-magnitude displacements are observed, with the highest rate not exceeding 0.3 cm / month in the horizontal components and 0 , 4 cm / month in the vertical. The lines of control across the crater were also stable.
Emissions of sulfur dioxide (SO2) recorded by the equipment of the triplet station (differential absorption spectrometry DOAS), located 5 km east-north-east (ENE) of the active crater, had an average value for Period of 1209 ± 890 t / day and a daily maximum of 3745 t / day, reported on 28 April. S02 emissions are at baseline levels for this volcano.
IP cameras installed on the volcano showed a constant degassing of the active (El Agrio) crater, predominantly whitish, associated with the hydrothermal system, with an additional incandescence overnight. The highest emission column was recorded on 30 April, with a height of about 800 m.
No emissions of sulfur dioxide (SO2) into the atmosphere in the sector have been reported, according to data published by the Ozone Monitoring Instrument (IMO, Sulfur Dioxide Group, http: // so2 .gsfc.nasa.gov /) and NESDIS, (http://satepsanoine.nesdis.noaa.gov).
No thermal alerts were reported in the area associated with the volcano according to data processed by infrared Mirova, (http://www.mirovaweb.it/) and MODVOLC (http://modis.higp.hawaii.edu/) .
The monitoring parameters indicate a stability of the volcanic activity at its base level, while maintaining activity related to a heat-excited hydrothermal system of an underlying magma body under cooling. It is considered that the volcanic system continues in equilibrium, therefore, remains at the technical alert level:
GREEN LEVEL: Active volcano with stable behavior – There is no immediate risk.
Source : Sernageomin
Cleveland , Alaska :
52°49’20 » N 169°56’42 » W,
Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE
Satellite observations earlier this week indicated continued growth of a new lava dome in the summit crater at Cleveland. Seismicity has remained low all week and no other activity has been observed. Following several observations over the previous several weeks of elevated surface temperatures at the summit, a satellite image on April 15 showed the presence of a small (less than 10-meter-diameter) mound deep in the crater; the previous 75-meter-diameter lava dome was destroyed by an explosive eruption on March 24. Satellite images through May 2 showed the lava on top of Cleveland’s dome is still active and had grown from about 15 meters in diameter to more than 20 meters in diameter over the previous few days.
Source : AVO
Photo : Lyons, John; Schmitt, Joe ( Aout 2015)