January 27 , 2016. EN. Chaparrastique , Sabancaya , Erebus , San Cristobal .
January 27 , 2016.
Chaparrastique , El Salvador :
Chaparrastique The activity of the volcano in El Salvador remains unstable:
26 JANUARY 2016. Chaparrastique volcano in the Salvadoran department of San Miguel, about 145 kilometers east of the capital, continues its unstable internal activity. According to recent information from the Ministry of Environment and Natural Resources (MARN), in the last hours the values of the seismic vibration of the volcano has fluctuated between 203 and 301 units RSAM average per hour, while the norm is 50.
Also, sulfur dioxide data recorded by the DOAS station located in the municipality of San Jorge continue to present fluctuations, indicating instability of the internal system of the volcano. The images captured by the surveillance camera located in the Cerro El Pacayal, continue to show pulses of gases emanating from the crater, said the MARN.
This unstable behavior of the volcano , 2129 meters above sea level can be maintained in the coming days and an increase in the activity no discard the possibility of reissuing ashes and even generate magma to the surface, which is typical of an active volcano.
According to the Environment Ministry, since the eruption of December 29, 2013, there have been a total of 23 eruptive episodes similar to the current (emission of gases and ash). Against this background, the MARN continues its strengthened monitoring device and maintains close communication with the General Directorate of Civil Protection and local observers.
The organization reiterated its call to journalists and individuals to not approach the top of the volcano, because of the degree of danger from present activity and the possibility of sudden explosions occur and strong gas emissions
Source : Prensa Latina
Photo : Michel Duchaine, Diario 1
Sabancaya , Peru :
Earthquakes LP type (associated with the passage of fluids), during this period, experienced a slight increase, averaging 18 LP / day, while in the previous period it was recorded 15 LP / day; on the other hand, energy is kept low.
n this period there is not recorded hybrid type of event (associated with the rise of magma material). Earthquakes VTPS types (proximal volcano tectonic, very close to the volcano, less than 6 km) experienced a marked increase in the average, scoring 20 VTPS / day in the period (in Report No. 02-2016 had recorded VTPS 10 / day). The magnitude of these events decreased during this period. However, there were 3 regular sized events (2.8 ML) on 19 and 20 January 2016. In this period, the tremor type of earthquakes decreased slightly, recording 11 TRE / day, while their energy is low.
Since early December 2015, VT events registered , associated with rock fracturing, continue to occur very close to the Sabancaya area. In this period, there were a total of 99 VT, distributed on two seismic foci: The first focus is located 6 km north-northeast of the crater, while the second focus, not well defined, is 14 km northeast of the crater, near the PATA station. It was recorded 55 VTP events (called proximal) within a radius of less than 6 km; They belong mostly to the first seismic focus.
Earthquakes are distributed primarily towards North-North-East of the Crater on Sabancaya. Highlights, 3 events VTP with moderate magnitude (2.8 ML) were recorded on 19 and 20 January 2016 with depths between 7 km and 13 km.
Seismicity VTD localized (distal seismicity) reached a total of 44 events, and is mainly distributed in the north and northEast of the volcano crater area. A M 3.5 event is noted, recorded on January 22, 2016 at 6:25 p.m. UTC at a depth of about 7 km.
• Frequency: The emissions of water vapor are constant, which, however, were not observed during the first days of this period, because of the abundant clouds present in the area.
• Color: The emissions observed were whitish gas (water vapor). A bluish color of the gases, a few days (magmatic gases) were observed sporadically and to a lesser extent.
• Height: The height of the fumaroles in this week ranged from 400 to 1000 meters above the base of the crater, approximately.
Anomalies of SO2: The satellite system « EOS Aura« GSDM–NASA (http://so2.gsfc.nasa.gov/) has not registered any significant SO2 density anomalies in that period.
Thermal anomalies: The Mirova system (of www.mirovaweb.it) has not detected by thermal anomalies in this period on Sabancaya.
Source : IGP
Photos : IGP, Robin des volcans , andina.com.pe.
Erebus, Antartic :
2015-2016 field season team introduction
Mount Erebus Volcano Observatory· January 26, 2016.
The G-081 team assembled on January 5, 2016 in McMurdo Station, Antarctica for the 2015-2016 field season. This represents the 43rd field season in Antarctica for Professor Phil Kyle, expedition leader. The 12 member team brings varied research interests to this field season and represents seven nationalities; half of the team is comprised of women. We are pleased to have an international collaboration with KOPRI (Korea Polar Research Institute) with two Korean geochemists joining the team this year. We will be working at Mount Erebus and also in North Victoria Land this season on a wide array of research areas.
Flying over the crater of Mount Erebus, Antarctica, during field work to maintain the volcano’s GPS network. (Photo/Annie Zaino, UNAVCO)
Dr. Philip Kyle (Principal Investigator, Expedition Leader), New Mexico Tech, USA
Katherine Anderson Aur, IRIS PASSCAL, USA
Tim Burton, UK-based freelance mountaineer, expedition guide, and photographer
Dr. Zoe Burton, Fellow in Pediatric Anesthesia, UK
Jeanine Chmielewski, New Mexico Tech, USA
Dr. Anne Foster, Southwest Care Center, USA
Dr. Ronni Grapenthin, New Mexico Tech, USA
Dr. Eugenia ‘Jane’ Ilyinskaya, University of Leeds, UK
Ji Hyuk Kim, Seoul University, Korea
Dr. Mi Jong Lee, Korea Polar Research Institute, Korea
Dave Parmelee, New Mexico Tech, USA
Dr. Nial Peters, University of Cambridge, UK
Looking into the second (smaller) lava lake. This lake, in contrast with the larger lake (out of view) is ephemeral and is not commonly observed during the field season.
The strategic role of McMurdo Sound date of the Heroic Age of Antarctic exploration. The explorers Ernest Shackleton and Robert Scott built bases on the coast as a starting point for their exploration of the interior of the continent.
The base, built in 1956, was originally called Naval Air Facility McMurdo , from the name of Archibald McMurdo , whose site was discovered by the English explorer Robert Falcon Scott. It has a port, three airports, heliport and over a hundred buildings, including one of the few places of worship of the Antarctic continent, the Chapel of the Snows. The station has around 1000 people in summer, but not more than 200 in winter. The majority of the population works in the field of science.
Sources : Mount Erebus Volcano Observatory , Wikipédia .
Photos : Annie Zaino / UNAVCO, Mount Erebus Volcano Observatory.
San Cristobal, Nicaragua :
The surveillance bulletin of volcanic activity .
At 9:35 this morning, January 22, 2016, an earthquake measuring 2.7 degrees occurred north of San Cristobal volcano. No significant change was observed in the behavior of this volcano.
The seismic amplitude live RSAM remains at low values, less than 40 units and emission of volcanic gases is low.
From left to right, the Casita, San Cristobal and El Chonco. In the foreground, the Moyotepe.
The San Cristóbal volcanic complex, consisting of five principal volcanic edifices, forms the NW end of the Marrabios Range. The symmetrical 1745-m-high youngest cone, named San Cristóbal (also known as El Viejo), is Nicaragua’s highest volcano and is capped by a 500 x 600 m wide crater. El Chonco, with several flank lava domes, is located 4 km W of San Cristóbal; it and the eroded Moyotepe volcano, 4 km NE of San Cristóbal, are of Pleistocene age. Volcán Casita, containing an elongated summit crater, lies immediately east of San Cristóbal and was the site of a catastrophic landslide and lahar in 1998. The Plio-Pleistocene La Pelona caldera is located at the eastern end of the complex. Historical eruptions from San Cristóbal, consisting of small-to-moderate explosive activity, have been reported since the 16th century. Some other 16th-century eruptions attributed to Casita volcano are uncertain and may pertain to other Marrabios Range volcanoes.
Source : Ineter , GVP.
Photo : Ineter.