March 31 , 2016. EN. Momotombo , Masaya , Telica , Kanlaon, Nevado Del Ruiz , Pavlof .

Home / Alaska / March 31 , 2016. EN. Momotombo , Masaya , Telica , Kanlaon, Nevado Del Ruiz , Pavlof .

March 31 , 2016. EN. Momotombo , Masaya , Telica , Kanlaon, Nevado Del Ruiz , Pavlof .

March 31 , 2016.

 

Momotombo , Masaya , Telica , Nicaragua :

Bulletin of volcanic activity.
March 28, 2016

Momotombo volcano.
During the weekend, the Momotombo volcano was active, 38 explosions of low magnitude with incandescent rocks and ash emissions were recorded.
Volcanic ash rose to a height of 300 meters above the crater and incandescent materials were scattered to the west and southwest.
The largest explosion took place at 23:40, with an ash column that reached a height of about 1,000 meters above the crater.
In total, there were 405 explosions that have occurred since the volcano began its recent activity on December 1.
A background microseismicity, suggesting that further explosions continue to occur continues.
The seismic amplitude in real time (RSAM) is at low values between 40 and 150 units.

 

 momotombo

Volcan Masaya.
During the weekend , two earthquakes were recorded in the caldera of the Masaya with magnitudes between 2.2 and M M1,8, which have the characteristics of being induced by the volcanic activity of Masaya.
A strong mixing is held in the lava lake in the crater Santiago, which continues to expand the size of the mouth of the crater.
At this time, there is little gas emission and the seismic amplitude values in real time is low to moderate, between 280 and 850 units.

masaya

Telica volcano.
An hight micro-seismicity and low emissions continue.
In the evening, a light was seen in the crater floor.
The seismic amplitude in real time is to low values, less than 80 units.
It is recommended to tourists and the general public not to approach the crater of the volcano as the possibility of new explosions producing gas and volcanic ash persists.

Source : Ineter.

Photos : elhorizonte.mx, Cesar Perez .

 

Kanlaon , Philippines :

KANLAON VOLCANO BULLETIN 31 March 2016 8:00 A.M.

In the past 24 hours Kanlaon Volcano’s seismic monitoring network recorded four (4) volcanic earthquakes and long-duration volcanic tremor that began on 01:30 AM 30 March 2016. Ongoing tremor is accompanied by observed weak to moderate steaming at the active vent, producing a 700m-high steam and ash plume that drifted south-southwest. In consequence, traces of light ash intermittently fell on Brgy. Sag-ang in La Castellana, Brgy. Ara-al and Brgy. Yubo in La Carlota City, and Brgy. Ilijan in Bago City, Negros Occidental. Continuous GPS data as of 14 March 2016 indicated slight inflation of the Kanlaon edifice since December 2015.

kanlaon


Alert Level 1 status remains in effect over Kanlaon Volcano, which means that it is currently in a state of unrest probably driven by hydrothermal processes that could generate more minor eruptions. The local government units and the public are reminded that entry into the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited due to the further possibilities of sudden and hazardous steam-driven or minor ash eruptions. Civil aviation authorities must also advise pilots to avoid flying close to the volcano’s summit as airborne ash from a sudden eruption can be hazardous to aircraft. DOST-PHIVOLCS is closely monitoring Kanlaon Volcano’s activity and any new development will be relayed to all concerned.

Source : DOST-PHIVOLCS

photo:  Negros traveling

 

Nevado Del Ruiz , Colombia :

Weekly Bulletin activity of the volcano Nevado del Ruiz, from 22 to 29 March 2016
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, the SERVICIO Geologico COLOMBIANO reports:

During the last week, the volcanic system continued to show unstable behavior. The recorded seismic activity was mainly associated with fluid dynamics in volcanic conduits. This fluid activity was characterized by the appearance of long period earthquakes (LP) and short volcanic tremor pulses with significant levels of energy, which were recorded individually or simultaneously.

These episodes of tremor was were also continued with different energy levels. Some of these seismic signals were associated with ash emission process, sometimes confirmed by the images captured by the cameras installed in the Volcano area and reports of the Colombian Geological Service officials and the National Park Los Nevados (NNNP ). These events have been located in the Arenas crater and in the Southeast sector of the volcano. New seismic signals of this type with high levels of energy and ash emissions in the atmosphere are not excluded, which can be dispersed according to the wind conditions prevailing in the region.

Seismic activity related to the fracturing of rocks in the volcanic structure continues to present significant energy levels and shows an increase compared to the number of earthquakes recorded the previous week. Earthquakes are located mainly in the west and southwest of the volcano, and to a lesser extent, in areas close to the Arenas crater and northern sectors, Southeast and Northwest of the volcanic structure. The depth of these events was between 1.1 and 8.1 km. A seismic increase on March 27, which took place in East and South-West and, to a lesser extent, in the North and the South distal areas was highlighted. The maximum amplitude of the week matches the recorded earthquake on March 27 at 11:11 (local time), with a magnitude of 2.7 ML (local scale), located in the southeast sector of the volcano to a depth of 3.5 km.

nevado-del-ruiz

The volcanic deformation measured from electronic inclinometers, global navigation satellite systems (GNSS) and satellite images to track changes in the tilt, the position and shape of the volcano (respectively), continues to record changes .
The volcano continues to emit into the atmosphere large amounts of water vapor and gases, including sulfur dioxide (SO2), which is distinguished as it was estimated by the permanent stations SCANDOAS installed in the volcano area and satellite imagery.
The column of gas, steam and ash reached on 25 and 26 March to a maximum height of 1400 meters above the summit of the volcano. The direction of the dispersion of the column was in line with the prevailing wind in the area, which during the week showed a predominant direction towards the northwest over the volcano.

Source : SGC

Photos : SGC ( Archives)

 

Pavlof , Alaska :

55°25’2″ N 161°53’37 » W,
Summit Elevation 8261 ft (2518 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

1459360835.png
Pavlof Volcano in eruption, March 28, 2016. The annotations show several of the processes that were occurring during the eruption including the formation of hot granular flows of rock material, the formation of lahar deposits, white steam plumes associated with the interaction of hot eruptive material and snow and ice, and the vertical ash column and drifting ash cloud. Pavlof sits just outside of Emmons Lake caldera, one of the largest caldera structures in the Aleutian arc. Also shown are several of the young post-caldera volcanoes inside the caldera. View is toward the north east.


The eruption of Pavlof Volcano has greatly diminished in intensity over the past day. Cloudy conditions have obscured views of the volcano in satellite and web camera images, but elevated surface temperatures at the summit and intermittent, low-level ash emissions have been observed during brief breaks in the weather. Seismic activity remains elevated at levels above background and over the past 24 hours has been characterized by occasional short-duration tremor bursts, likely associated with the low-level ash emissions. The drifting, remnant ash cloud from the energetic phase of the eruption on Sunday and Monday has dispersed and there are no National Weather Service aviation or ashfall advisories in effect at this time.

AVO Image

Although the intensity of the eruption has diminished, it is possible for conditions to change at any time and more significant ash emissions may resume with little to no warning. Pauses of days to weeks are common during eruptive episodes at Pavlof. AVO will continue to monitor the volcano closely.

 Source : AVO/USGS

Photo : Almandmoss, Nahshon , Chesley, Theo ( 2013)

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