October 06 , 2016. EN. Turrialba , Bulusan , Guagua Pichincha , Cascade Range Volcanoes.
October 06 , 2016.
Turrialba , Costa Rica :
Activity report of the Turrialba volcano
October 5, 2016, 9:00
From 2:50 p.m. yesterday, October 4, the seismic signal in the stations located near the volcano, indicating a total reduction of tremors signals, except for a 20 minute period of low amplitude, recorded between 10:49 and 11:08 that night.
It is possible to observe on the seismograms few earthquakes type LP, long period earthquakes associated with fluid movements and vibrations inside the volcano.
During the night, it was possible to observe a very interesting and attractive sight at the top of Volcan Turrialba, water vapor column and gas emanating from the volcano reflected the incandescence in the crater, forming a glow visible through the weather. It was possible to observe practically all night and early morning. That the column is white (the presence of steam and gas) reflects the existing incandescent inside the crater.
As noted above, what we have in the crater are very high temperature points , without this being the meaning that the magma began to come out to the surface.
Due to the decrease in ash emissions, no reports of sulfur smell or ash falls.
Source : Ovsicori
Photo : Roxi
Bulusan, Philippines :
BULUSAN VOLCANO BULLETIN 06 October 2016 8:00 A.M.
In the early morning of 06 October, Bulusan Volcano generated a minor phreatic eruption. The event lasted for approximately 15 minutes based on the seismic record and was recorded as a short harmonic tremor. This eruption could not be observed visually due to thick clouds covering the summit. Ashfall was reported in some areas in Gubat and rumbling sounds were heard in Barangay San Roque, Bulusan. Bulusan’s seismic monitoring network recorded a total of forty (40) volcanic earthquakes during the past 24 hours. Moderate emission of white steam plumes that crept downslope from the southeast vents was observed. Sulfur dioxide (SO2) emission was measured at an average of 388 tonnes/day on October 5, 2016. Precise leveling data obtained on August 16-25, 2016 indicated slight inflationary changes of the edifice relative to May 2016. Moreover, ground deformation data from continuous GPS measurements as of 30 September 2016 showed inflationary trends since July 2016.
Alert Level 1 (abnormal) remains in effect over Bulusan Volcano. This indicates that hydrothermal processes are underway beneath the volcano that may lead to more steam-driven eruptions. The local government units and the public are reminded that entry to the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited due to the possibility of sudden and hazardous steam-driven or phreatic eruptions.
Source : Phivolcs
Photo : Archive
Guagua Pichincha , Equador :
CO2 measurements, fumaroles temperature, sampling and photographs by drone in the volcano Pichincha
The work done during this visit to the crater of the Guagua Pichincha volcano was conducted by experienced professionals under strict security standards for personal protective equipment and with a permanent radio contact with the Terras center of the Institute of geophysics. The descent into the volcano is not recommended.
On Wednesday, September 21, 2016, a team of technicians from the Geophysical Institute (IG-EPN) of the National Technical University and the Research Institute for Development (IRD, France) carried out geological work in the Guagua Pichincha volcano crater. The objectives of the mission were to: measure the temperature and the concentration of CO2 in the different fields of fumaroles, sample the native sulfur and the rocks of the Dome of the last eruption, as well as taking multiple pictures and videos of the Crystal dome , using a drone.
The maximum temperature of fumaroles was 86.3 ° C, measured at the sampling fumaroles of hydrothermal system associated with the volcano. In general, there was an increase of CO2 in the entry in the fumarole areas. However, in the fumarole called « locomotive« , an abnormal value of ~ 65 000 ppm was measured. Additional measures are needed to confirm or not the presence of this gas in high concentrations in this sector. Outside areas fumaroles, CO2 values are within normal limits. Pictures taken with the drone revealed no change in the known structures of the volcano.
The group left at 4:45 in the morning the Institute of Geophysics towards Lloa and arrived the refuge of the Guagua Pichincha volcano at 6:00. Weather conditions were optimal (Fig. 1). The Crystal dome was reached at 7:30 (Fig. 2). First, we worked on sampling of the fumarole (Fig. 3) to install the CO2 counter and to measure the temperature thereof. Then, on the dome, the images by the drone were taken. At 10:00, the counter of CO2 was recovered and native sulfur sample was taken. A visit to the dome formed during the last eruption in 2000 was performed. During the journey, measuring CO2 and temperature of fumaroles were performed. In this dome a rock sample was taken. The data from fumarole « locomotive » were taken through an aligned field of fumarole. (Fig. 2).
Figure 3. Left: Crater of Guagua Pichincha volcano that highlights the different fields of fumaroles. Image: Camera GPCAM. Right: Sampling of gases from a fumarole reaching heights of at least 10 meters. Photography: F. Vásconez IG-EPN, 21/09/2016.
The temperatures were measured with a thermometer data logger with four channels omega HH309A with an thermocouple type K(fig. 4). The highest values obtained in different fumarole reached 86.3 ° C (Fig. 2). This temperature corresponds to the boiling point of water up to the fumaroles (~ 4050 m above sea level). Other vents showed similar or slightly lower temperatures (Table 1).
Table 1. Maximum Temperatures and CO2 of the different fumaroles of the Crystal Dome. UTM coordinates.
In addition, a native sulfur sampling at fumarole and in extruded rocks in the dome formed in the last eruption in 2000 was carried out.
Figure 6. native sulfur deposit in sampling fumaroles. Photography: Bernard B., IG-EPN, 21/09/2016.
Finally pictures were taken with a drone DJI Phantom 2 Streva provided by the project. We have done several shots of the morphology of the Crystal dome in which the surface activity and various topographical traces left by past eruptions of the Guagua Pichincha are obvious: the explosion craters and ballistic impact , areas fumaroles, dome of the last eruption among others. No morphological changes of pre-existing structures were observed.
Figure 8. Photo of the dome of the eruption of 2000. No morphological changes were observed. Photography: Bernard B., IG-EPN. 09/21/2016.
The IG-EPN, and other institutions, continues its efforts to monitor active volcanoes of Ecuador.
Source : IG EPN
Cascades Range volcanoes , United – States :
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN
Activity Update: Activity at all volcanoes in the Cascade Range of Oregon and Washington is at normal background levels. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; and Mount Hood, Mount Jefferson, Three Sisters, Newberry, and Crater Lake in Oregon. A few small earthquakes were located at Mount St. Helens, Mount Rainier, and Newberry Volcano. No unusual ground deformation or gas emission was detected at any of the volcanoes.
Also during this past week, a field crew completed maintenance on seismic and deformation monitoring stations at Three Sisters and Newberry Volcano.
The U.S. Geological Survey and Pacific Northwest Seismic Network (PNSN) continue to monitor these volcanoes closely and will issue additional updates and changes in alert level as warranted.
Source : CVO