October 26 , 2016. EN. Cleveland , Bulusan , Nevado Del Ruiz , Fuego .
October 26 , 2016.
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
Unrest continues at Cleveland Volcano. Since yesterday’s explosion, nothing of note has been observed in satellite data under partly cloudy to clear viewing conditions. Clear web camera images this morning showed intermittent minor steam emissions occurring within the summit crater. It is possible that these emissions contain minor amounts of ash, but the plumes are very small and are rising just slightly above the crater rim. No significant activity was detected in seismic or pressure sensor data during the past day.
Source : AVO
Photo : Nasa .
Bulusan, Philippines :
BULUSAN VOLCANO BULLETIN 26 October 2016 8:00 A.M.
Bulusan Volcano’s seismic monitoring network recorded fifty-two (52) 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 56 tonnes/day on October 25, 2016. Precise leveling data obtained on October 17-23, 2016 indicated inflationary changes of the edifice relative to August 2016. Inflation was also recorded by continuous GPS measurements as of 30 September 2016, indicating pressurization beneath the volcano edifice.
Alert Level 1 (abnormal) remains in effect over Bulusan Volcano. This indicates that hydrothermal processes are underway beneath the volcano that may lead to steam-driven or phreatic eruptions. Local government units are advised to take precautionary measures due to the increased possibilities of another eruption as warned by increased seismic activity. The general public is reminded that entry into the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited and that vigilance in the Extended Danger Zone (EDZ) must be exercised due to the increased possibilities of sudden and hazardous phreatic eruptions.
Source : Phivolcs .
Nevado Del Ruiz , Colombia :
Subject: Activity Bulletin of the Nevado del Ruiz volcano.
The level of activity continues at:
Activity level Yellow or (III): changes in the behavior of volcanic activity.
Regarding the monitoring of the activity of the Nevado del Ruiz volcano, the Colombian Geological Service reports that:
During the past week, various monitoring parameters, show that the Nevado del Ruiz volcano remains unstable.
Seismic activity related to rock fracturing under the volcanic edifice has shown compared to the previous week, a slight decrease in the number of earthquakes and the seismic energy released. This seismicity was located mainly in the distal seismogenic source from the North, and to a lesser extent, in the areas of Northeast and South of the volcano and around the Arenas crater. The depths of earthquakes ranged between 0.5 and 8.9 km. The maximum magnitude recorded during the week was 2.3 ML (local magnitude), which corresponds to the earthquake registered on 20 October at 6:27 (local time), located in the distal northern sector of the volcanic structure, 5.7 kilometers deep.
Seismic activity related to fluid dynamics in volcanic conduits was characterized by the appearance of long period earthquakes (LP) and very long period (VLP), pulses of tremors and multiple earthquakes of fluid with different energy levels. This type of seismicity was mainly located in the Arena crater , around this one, and, to a lesser extent in the southeast sector of the volcano. Some of these seismic signals have been associated with the emissions of gas and ash into the atmosphere, as confirmed, from images captured by the cameras installed in the volcano area, as well as by reports from officials from the National Natural Park of Los Nevados (NNNP) and the Geological Service of Colombia (CMS). The registration of new seismic signals of this type with higher energy levels, which can be associated with gas and ash emissions is not excluded. It is important to remember that the ash emission process can occur over several days and sometimes several times a day without involving individual report for each episode.
The volcanic deformation measured from electronic inclinometers, global navigation satellite systems (GNSS) and satellite images to determine changes in the tilt, the position and shape of the volcano continues to record over recent months, inflation and intermittent pulses of inflation / deflation, possibly associated with emissions of ash and gas.
The volcano continues to emit into the atmosphere large amounts of water vapor and gases, including sulfur dioxide (SO2), as shown by the values obtained by the SCANDOAS stations in the volcano area and the imaging satellite. In follow-up information provided by the site Mírová, two thermal anomalies of low energy associated with the Arenas crater, were recorded on 18 and 20 October with values of 5.0 and 9.0 MW respectively.
The column of gas, steam and ash from time to time, reached a maximum height of 2000 m above the top of the volcano, on October 18. The direction of the dispersion of the column was in line with the prevailing wind in the area, which during the week showed a dominant direction towards the West , promoting the dispersion of the ashes to the populations in this direction .
The Nevado del Ruiz volcano continues at Amarillo level activity. It is not excluded that this activity is capable of indicate an acceleration of the process, involving greater instability of the volcano and forces to be amended accordingly the level of activity.
Source : SGC
Fuego , Guatemala :
A fumarole activity continues, moderate, white, rising to a height of about 4,200 meters (13,779 feet) which disperse toward the west and southwest. It has three to four explosions per hour, which are characterized as mild to moderate, emitting a gray column to a height of about 4400-4600 meters. (14.435 to 15.091 feet) which travels 10 kilometers to the west and southwest of the volcano.
The explosions were accompanied by low and moderate low rumblings generating shock waves, causing vibrations in the roofs of houses near the volcano. Incandescent pulses at a height of 100-150 meters above the crater create low and moderate avalanches around the edge of the crater. Ashfall on: Sangre de Cristo, San Pedro Yepocapa, Morelia, Panimaché I and II.
Source : Insivumeh