October 30 , 2016. EN. Turrialba , Irazu , Fuego , Mauna Loa .
October 30 , 2016.
Turrialba , Costa Rica :
Activity report of the Turrialba volcano eruption
29 October 2016 Updated 17:00
Eruptions and seismic activity:
The Turrialba volcano continues to present its eruptive activity that is underway since September 13, 2016, almost without interruption, with the issuance of variable pulse of gas, ash and aerosols. The height of the eruptive plumes varied considerably during this period of activity, with columns reaching heights between 200 and less than 2000 meters above the summit of the volcano, with the exception of two eruptions observed on September 19 which reached 3,000 and 4,000 meters high on the active crater.
Since October 28 at 17:00 and until October 29, 2016 at 5:00 pm, seismographs placed on the Turrialba volcano experienced a volcanic tremor of low amplitude, relatively constant, with low amplitude intervals and other intervals smaller, with more energetic pulses and a wider frequency band. Gas plumes of ash and aerosols varied between 500 and 1000 meters above the summit of the volcano, with a predominance at 500 meters. The direction of the scattering of ashes and gases varied between the southwest and the northwest over the past 24 hours.
Scattering of ashes and gases in the environment:
The dispersion of gases, ash and aerosols emitted by the Turrialba during the day was mainly to the Northwest / West, according to data from weather stations of the National Meteorological Institute IMN, located on the tops of Turrialba and Irazu, and the map of dispersion of gases, ash and aerosols generated with the code LAQAT AERMOD VIEW-A. Based on this map, areas that may be affected by the materials issued by the Turrialba volcano are: Agricultural holdings in areas in the northwest and west of Turrialba (Silvia, El Retiro), farms of the volcano Irazu in San Gerardo (Robert, Volio, Lara), the National park Braulio Carrillo, Heredia, Barva, Poas, Alajuela, San José.
Reports of falls of ash and perception of sulfur smell.
The wind direction during the day was to the northwest, which coincided with the places that have reported ash fall, some of the reports come from:
1) San Jose: Tibás, Moravia, Guadalupe, Las Mercedes Montes de Oca, Coronado;
2) Heredia San Joaquin de Flores, San Bosco Santa Barbara, San Francisco, Bethlehem, St. Domingo, San Isidro;
3) Alajuela center.
There are few reports of perception of sulfur odors: 1) Heredia: Central County, San Francisco; and 2) San Jose: Tibás.
Detection of fine volcanic particles floating in the air in Heredia:
Sensors of suspended particles in the gas from the atmosphere and volcanic aerosol of the monitoring station of OVSICORI-A located in the Omar Dengo campus of the National University of Heredia, recorded between 25 and 29 October 2016 a moderate increase in the concentration of particles or aerosols PM 10 (up to 65 ug / m 3) and PM 2.5 (up to 47 ug / m 3) because the wind was oriented mainly towards North -West, showing a lot of changes in his direction during the day.
Because of the persistent eruptive activity that shows the Turrialba volcano, it is important to take preventive and protective measures, especially for those who are in the vicinity of the volcano and are more sensitive to environmental changes, with respiratory problems, asthma, allergy or bronchial and cardiovascular problems. They must protect the airway and mouth with masks or wet handkerchief, her eyes with goggles, and skin and head with long sleeve shirt and a hat.
Source : Ovsicori
Irazu , Costa Rica :
New volcano tectonic earthquakes continue to shake the local fault system that are part of the Irazu volcano, generating numerous micro earthquakes.
Note that a geological fault near or part of the the volcanic system that presents seismic activity, according to recent studies, can also have an independent volcanic activity.
Recalling the eruptive process in 1723; during that year, there was a strong earthquake in the area and a few minutes later, the largest known eruption produced by the Irazu.
The Irazu volcano has today at least 21 earthquakes associated with the rupture of the rock by the flow of magma to the surface, which have been confirmed by the Oviscori volcanologist, Dr. Maria Martinez. The biggest of them , at 2: 45 hl with a magnitude of 3.2 degrees on the Richter scale and 5 km deep. Monitoring this activity is maintained.
Further evidence that these earthquakes are volcano – tectonic is simply that they are accompanied by intervals of VLP events that are very small microseismic related to the allocation of the rock facilitated by the rise of magma towards the surface.
It is estimated that an eruption could occur within a period of one to ten years, although the possibility is given to acceleration if changes occur in the crust of the earth.
Source : Radiotica
Fuego , Guatemala :
ERUPTION of the FUEGO .
Morphology: composite stratovolcano.
Geographical location: 14 ° 28 ‘ 54˝ N Latitude ; 90 52’54˝ W longitude .
The first has an approximate height of 450 meters above the crater and that feeds a lava flow to the canyon of Las Lajas, over a length of 1600 meters, the second source has a height of about 250 meters above the crater feeding a lava flow to the canyon Santa Teresa, over a length of 300 meters and the third source has an approximate height of 200 meters above the crater feeding a lava flow to the canyon Taniluyá, 500 meters long. On the contour of the crater, constants moderate volcanic avalanches occur.
Moderate to heavy explosions with ash column at a height of 6,500 meters (21,325 feet) traveling at more than 40 kilometers to the west and northwest are recorded. Constant sounds, moderate to strong, as locomotive and shock waves sensitive about 15 km from the volcanic perimeter are noted. Ash fall in areas of San Pedro Yepocapa, Las Conchitas and Sangre de Cristo, possible in St. Lucia Cotz.
This eruption maintains its energy, with the possibility that pyroclastic flows are generated, it is essential to avoid staying in or near the main canyons. The ash column can rise above and move a greater distance, so take into account the variability of the wind.
Therefore, the INSIVUMEH recommends:
A CONRED: take the precautions it deems necessary due to the increased activity of the Fuego volcano.
At the Directorate General of Civil Aviation: Take precautions with air traffic, because the ash column reached a height of 6,500 meters (21,325 feet) and is moving northwest and west.
Tourist guides and tourists: do not climb to the crater because it has explosions that may generate ballistic falls more than 2 kilometers from the crater.
Source : Insivumeh
Photos : Insivumeh , Sergio Emilio Montufar Codoner .
Mauna Loa , Hawai :
19°28’30 » N 155°36’29 » W,
Summit Elevation 13681 ft (4170 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW
Rates of deformation and seismicity at Mauna Loa remain above long-term background levels.
Mauna Loa is not erupting. During the past week, earthquakes occurred primarily in the south caldera and upper Southwest Rift Zone at depths less than 5 km (3 mi). Additional earthquakes occurred in the Kaoiki area of the east flank between Kilauea and Mauna Loa mostly in in 5 -11 km (3 – 7 mile) depth range.
Global Positioning System (GPS) measurements continue to show deformation related to inflation of a magma reservoir beneath the summit and upper Southwest Rift Zone, with inflation occurring mainly in the southwestern part of the magma storage complex.
Measurements from a continuously-monitored fumarole site within the summit caldera showed relatively steady fumarole temperatures and no significant changes in either sulfur dioxide or carbon dioxide concentrations in volcanic gas emissions.
Source : HVO