June 22 , 2017. EN . Nevado Del Ruiz , Bezymianny , Katla , Bárðarbunga , Copahue .

Home / Bárðarbunga / June 22 , 2017. EN . Nevado Del Ruiz , Bezymianny , Katla , Bárðarbunga , Copahue .

June 22 , 2017. EN . Nevado Del Ruiz , Bezymianny , Katla , Bárðarbunga , Copahue .

June 22 ,  2017.

 

Nevado Del Ruiz , Colombia :

Weekly activity bulletin of the volcano Nevado del Ruiz, from 13 June to 19 June 2017
The level of activity continues: at the level  of activity yellow (III)  : changes in the behavior of the volcanic activity.

With regard to monitoring the activity of the volcano Nevado del Ruiz, the Colombian Geological Survey reports that:

Over the past week, the various monitoring parameters show that the volcano Nevado del Ruiz continues to show unstable behavior.

Seismicity caused by rock fracturing showed a slight increase in the number of earthquakes and seismic energy released compared to the previous week. The earthquakes were predominantly in the northern, distant, northeast and southwestern areas at depths between 1.2 and 7.2 km. The maximum magnitude recorded during the week was 1.7 ML (local magnitude) for the earthquake of June 13 at 22:56 (local time), located 2.35 km east of the Arenas crater, at a depth of 3.8 km. During the week, a slight increase in activity on 19 June, located at an average distance of 6.0 km to the southwest of the Arenas crater, at depths between 5.0 and 6.5 km, was highlighted. Overall, events were characterized as having low energy, the largest magnitude was 1.3 ML (local magnitude) for earthquakes recorded at 01:36 and 01:38 (local time).

 

The seismic activity associated with the fluid dynamics inside the volcanic structure ducts showed a slight increase in energy level and the number of recorded events compared to the previous week. This type of activity is mainly characterized by the presence of several fluid earthquakes, long-period and very long-period events and pulses of tremor with varying energy levels and durations. Some of these seismic signals have been associated with ash emissions into the atmosphere, as confirmed by the cameras installed in the volcano region.

Volcanic deformation, measured from electronic inclinometers, Global Navigation Satellite Systems (GNSS) and satellite images to determine changes in tilt, position and shape of the volcano, continues to record in recent months a deflationary process and intermittent inflation / deflation impulses, possibly linked to the emission of gas and ash.

 

The volcano continues to emit large quantities of water vapor and gases, including sulfur dioxide (SO2), as shown by the values obtained by the SCANDOAS stations installed in the volcano area and the analysis of satellite images of the volcano  . In the tracking information provided by the NASA and FIRMES Mírová website, no thermal anomaly was identified during the week.

The column of gas, steam and ash from time to time reached a maximum height of 700 m, measured on the top of the volcano, on June 13 and 16. The direction of dispersal of the column was governed by the direction of the wind in the zone, which predominated towards the Northeast.

The volcano Nevado del Ruiz continues to activity level Amarillo.

 

Source : SGC

Photo : fincasagroturisticas.com

 

Bezymianny , Kamchatka :

 

55.97 N, 160.6 E;
Elevation 9453 ft (2882 m)
Aviation Color Code is ORANGE

A moderate activity of the volcano continues: an incandescence of the lava dome is observing at night and a lava flow is squeezing at the western flank of the lava dome.

 


A strong gas-steam activity and an incandescence over the lava dome of Bezymianny volcano on 18 June 2017.

Satellite data by KVERT showed some increase of temperature of thermal anomaly over the volcano. According to video data by KB EGS RAS, a gas-steam plume up to 4 km a.s.l. and hot avalanches from the lava dome were observing on 15 June.


On 15 June KVERT reported that the temperature of a thermal anomaly identified in satellite images had increased, and that the webcam recorded a gas-and-steam plume rising above Bezymianny to 4 km (13,100 ft) a.s.l. and drifted SSE. Hot avalanches of material originated from the lava dome. An explosive event began at 1653 on 16 June, producing an ash cloud 28 x 25 km in size that drifted NE. The Aviation Color Code was raised to Red (the highest level on a four-color scale), but lowered back down to Orange about 5 hours later. At 2110 the ash cloud was 212 x 115 km in size and drifting E; the leading edge of the cloud was about 245 km E.

Source : Kvert , GVP .

Photo : A. Belousov, IVS FEB RAS

 

 

Katla , Bárðarbunga , Iceland  :

Yesterday morning, around 6:31, three earthquakes were detected under the Bárðarbunga volcano. The biggest was M3.1 at 6:36, but the other two were smaller than M3.0.

On 20 June, around 18.51, a seismic swarm was detected under the east side of the Katla caldera. The most important earthquake was M3.6 at 18:52. No other earthquake of M3.0 or more was found in this swarm, but more than 10 earthquakes were measured in total.

Issued on June 21 at 07:46 GMT

 

 

L’image contient peut-être : ciel, nature, plein air et eau

Earthquakes in Katla volcano are more common in summer than in winter.

 

Earthquakes in Katla volcano not a sign of eruption .

21 JUNE 2017. “There are no signs of Katla erupting,” says Sigríður Magnea Óskarsdóttir of the Iceland Met Office. A series of earthquakes occurred in Katla, one of Iceland’s infamous volcanoes, yesterday.

The biggest was measured at a magnitude of 3,6 on the Richter scale and they were over 10 in total, located in the east part of the volcano.

“There hasn’t been much going on since yesterday,” says Óskarsdóttir. She points out that earthquakes like this are not unusual this time of year. There are often earthquakes in Katla over the summer, though no one is sure what exactly the reason might be. One of the theories is it connected to the glacier on top of the volcano melting.

Earthquakes in Bárðarbunga today
Though Katla was quiet today there were earthquakes in Bárðarbunga volcano in Vatnajökull glacier. The biggest was 3,1 on the Richter scale.

Óskarsdóttir says the earthquakes in Katla and in Bárðarbunga are not connected, as the two volcanoes are far apart and don’t draw on the same source.

 

Source : en.vedur.is. ICELAND MONITOR .

Photo : Iceland Monitor/Rax

 

Copahue , Chile :

During this period, 126 seismic events were recorded, 15 of which were classified as volcano-tectonic (VT) associated with a rock fracturing process. Similarly, there were 111 events associated with fluid dynamics under the volcano, 70 of which were classified as long-term events with reduced displacement values ​​of 9.3 cm2. In addition, 41 events of very long period type, with reduced displacement values ​​of 37 cm2 maximum were recorded.

With regard to seismic activity of the VT type, the local quantities (ML) are less than or equal to M 2.2. The highest energy event was located north-northwest (NNO), 5.4 km from the Agrio crater with a depth of 1.7 km.
On June 5, an earthquake with less intensity, reported as felt by the community of Caviahue was recorded. It was located 7.3 km east of the Agrio crater and at a depth of 5.3 km. The event was a local magnitude (ML) equal to M1,9.

 

During this period, a constant, low-intensity tremor signal was recorded, mainly associated with the exit of gases from the Agrio crater. This signal exhibited fluctuating DRC values, of the order of 1.5 +/- 0.5 cm2. The dominant frequencies were distinguished in two bands, the first towards 0.6 Hz and the other between 1.1 and 1.7 Hz.

On the data obtained from three (3) GNSS stations measuring the deformation of the volcano surface, almost zero values ​​for the two components of horizontal and vertical displacement were observed. In turn, the control line that crosses the volcano was stable.
The IP cameras installed in the vicinity of the volcano showed constant degassing of the active crater (Agrio), vigorous ash emissions constant over several days were reported. The main emission column was recorded on 05 June, which was directed towards the east, with a maximum height of 300 m.
No emissions of sulfur dioxide (S02) into the atmosphere have been reported, according to data published by the Ozone Monitoring Instrument (IMO) Sulfur dioxide group (http: //so2.gsfc. Nasa.gov/).
One (1) thermal alert is reported, associated with the volcano during the first fortnight on June 5th with a radiative volcanic power (VRP) of 3 MW. What is considered low.

 


Monitoring parameters indicate that since June 4, the system was re-excited, preceded by the recording of VLP type earthquakes, possibly associated with the increase of small volumes of magma material inside the volcanic ducts , Unbalancing the system again. Therefore, the Copahue volcano remains at the technical alert level:
YELLOW LEVEL: changes in the behavior of volcanic activity – probable time for eruption: weeks / months.

Note: It is recommended to apply preventive restrictions on the access of a zone near the crater with a radius of 1000 m, as the activity of fumaroles persists.

Source : Sernageomin

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