January 18 , 2017. EN. Nevado Del Ruiz , Kilauea , Colima , Bogoslof .

Home / Alaska / January 18 , 2017. EN. Nevado Del Ruiz , Kilauea , Colima , Bogoslof .

January 18 , 2017. EN. Nevado Del Ruiz , Kilauea , Colima , Bogoslof .

January 18 , 2017.

 

Nevado Del Ruiz , Colombia :

Weekly activity bulletin of the volcano Nevado del Ruiz, from 10 January to 16 January 2017

The level of activity continues: at the level  activity yellow or (III): changes in the behavior of volcanic activity.

As regards the monitoring of the activity of the volcano Nevado del Ruiz, the Colombian Geological Survey reports that:

During the week, various monitoring parameters show that the volcano Nevado del Ruiz remains unstable.

Seismic activity related to rock fracture under the volcano showed a slight decrease in the number of earthquakes and seismic energy released compared to the previous week. This seismicity was located mainly in the instability zones of the South-West, North-East and South-East, and to a lesser extent in the Arenas crater and the North-West sector of the volcano. The depths of the earthquakes varied between 0.7 and 8.8 km. The maximum magnitude recorded during the week was 1.7 ML (local magnitude), corresponding to an earthquake recorded on January 14 at 22:25 (local time), 3.9 km deep and located 1, 6 km east of the Arenas crater.

 

Seismicity related to fluid dynamics in conduits of the volcanic structure was characterized by the appearance of earthquakes with different long-period (LP) and very long period (VLP) energy levels, pulses of tremors and multiple fluid earthquakes. This type of seismicity has also shown a decrease in the number of earthquakes and the seismic energy released. The earthquakes were mainly located in the Arenas crater, in the Southeast sector and to a lesser extent in the northern part of this sector. Some of these seismic signals have been associated with the emission of gases and ash into the atmosphere, as confirmed by the cameras installed in the volcano region and reports from officials of the Natural Park of Los Nevados (Pnnn) . The recording of new seismic signals of this type with higher energy levels that may be associated with emissions of gases and ash is not excluded. It is important to remember that ash processes can occur over several days and sometimes several times a day without involving an individual report for each episode.

Volcanic deformation, measured from electronic inclinometers, Global Navigation Satellite Systems (GNSS) and satellite images to determine changes in inclination, position and shape of the volcano, continues to record Of the last few weeks a process of deflation and intermittent inflation impulses possibly related to the emission of gas and ashes.

 

The volcano continues to emit significant amounts of water vapor and gases, including sulfur dioxide (SO2), as evidenced by the values obtained by the SCANDOAS stations installed in the volcanic zone and on the satellite image. In the monitoring information of the thermal anomalies provided by the Mírová portal, two anomalies, with values of 8 and 16 MW respectively, were identified on 11 and 13 January, associated with the Arenas crater.

The column of gas, steam and ash from time to time reached a maximum height of 1800 m measured on the top of the volcano on 14 January. The direction of the dispersal of the column was in line with the dominant wind regime in the region, which fluctuated between the Southwest and the South-East during the week.

The volcano Nevado del Ruiz continues at Amarillo activity level.

Source : SGC

Photos : Archives

 

Kilauea , Hawai :

19°25’16 » N 155°17’13 » W,
Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

 

Activity Summary:
Kilauea Volcano continues to erupt at its summit and East Rift Zone. The 61g flow field remains active near Pu’u ‘O’o, and lava continues to enter the ocean at Kamokuna. These lava flows currently pose no threat to nearby communities. This morning the lava lake surface in Halema’uma’u Overlook vent was 52.5 m (172 ft) below the adjacent floor of Halema’uma’u crater.

 

Summit Observations:
Summit tiltmeters continue to record very slow deflationary tilt. This morning the lava lake level remains quite deep at 52.5 m (172 ft) below the floor of Halema’uma’u crater, largely unchanged from yesterday. Earthquake activity continues at low rates with tremor amplitude fluctuating in response to changing lava lake circulation, spattering, and rockfalls. Under trade wind conditions over the past week, sulfur dioxide emission rates ranged from about 1000 to 2700 metric tons/day.

 

Pu’u ‘O’o Observations:
Pu’u ‘O’o tiltmeters showed very slight deflationary tilt over the past 24 hours. Clear webcam images from Pu’u ‘O’o over the past day recorded persistent glow at long-established sources within the crater and from a vent high on the northeast flank of the cone. Seismicity remains unchanged. The sulfur dioxide emission rate from all East Rift Zone vents was about 270 metric tons/day when last measured in late December.

 

 

Lava Flow Observations:
The episode 61g flow is still active and entering the ocean at Kamokuna. Following the New Year’s eve collapse event, a new delta has not yet begun to form in earnest, possibly because of very steep offshore bathymetry. Active surface lava flows persist near Pu’u ‘O’o and are slowly moving (less than 100 feet per day) east-southeast. As of January 12, this secondary branch was about 2.4 km or 1.5 mi from the vent. The episode 61g flows pose no threat to nearby communities at this time.

Source : HVO

Photos : Bruce Omori

 

Colima , Mexico :

MEXICO CITY: National Emergency Preparedness Coordinator, Luis Felipe Puente, announced that during the early hours of Wednesday, the volcano Colima recorded a large explosion, and therefore recommended people close to the volcano to follow the recommendations of the authorities for their integrity.

Thanks to his Twitter account, the federal official said that at 00:27 on Wednesday, the volcano Colima had made an explosion of more than two kilometers high, accompanied by the release of incandescent materials.
In another message, Luis Felipe Puente shared the safety recommendations for people living near the volcano.

It is reported that the National Coordination of Civil Protection in collaboration with the authorities of Colima and Jalisco and the University of Colima, maintain constant surveillance to inform the population in the area of the volcano.

 

If ash emissions occur, civil protection recommends:

Cover your nose and mouth with a damp handkerchief or a mask.
Clean your eyes and throat with pure water.
Use glasses and avoid contact lenses to reduce eye irritation.
Cover the water tanks and other tanks so they do not get dirty.
Remove the ash continuously to avoid accumulation on the roofs (sheet, cardboard, plywood, canvas and the like), as they may fall off overweight.

 

Source : siete24.mx

Photo : Hernando Alonso Rivera Cervantes

 

Bogoslof , Aleutians Islands , Alaska :

Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Issued: Tuesday, January 17, 2017, 8:56 AM AKST
Source: Alaska Volcano Observatory
Notice Number: 2017/A22
Location: N 53 deg 55 min W 168 deg 2 min
Elevation: 492 ft (150 m)
Area: Aleutians

 

Volcanic Activity Summary: Increased seismic activity over the past several hours indicates that minor explosive activity is occurring at Bogoslof. The level of activity is variable, with the most energetic events observed around 1500 UTC and 1640 UTC (4:00 and 7:40 am AKST). Minor emissions of steam and minor amounts of volcanic ash observed in satellite data around 1500 and 1730 UTC. These events were too small to generate detectable lightning or infrasound (pressure) signals. The National Weather Service has estimated a maximum altitude for these small clouds at 15,000 ft above sea level. Satellite data showed that they dissipated quickly. The volcano remains restless and additional explosive events could occur with little warning.

Recent Observations:
[Volcanic cloud height] 15,000 ft asl (maximum)
[Other volcanic cloud information] Minor emissions visible in satellite data

 

Source : AVO

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