January 20, 2017 . EN. Colima , , Bogoslof , Nevados de Chillan .

Home / Alaska / January 20, 2017 . EN. Colima , , Bogoslof , Nevados de Chillan .

January 20, 2017 . EN. Colima , , Bogoslof , Nevados de Chillan .

January 20, 2017

 

Last Post before the beaches of ERTAALE. We meet again in February.

Colima , Mexico :

The explosions of the volcano are of moderate to large intensity.

  The exclusion zone of all activities is maintained at 8 kilometers around the volcano

The State Government, through the National Unit for Civil Protection, said that the volcanic activity registered Wednesday at 00 27 hours is in the scenarios envisaged for this type of activity.

On the explosion, the details of the national civil protection system indicate that the intensity was moderate to great, with the emission of incandescent materials that covered much of the volcano. « Ballistic missiles » were also observed in the West, South-West, South-East and North with no more than 2 km range.

 

Moreover, on the basis of activity recorded over the last few days, the exclusion zone is maintained at 8 km around the volcano, a situation which the national civil protection system reiterates, with the recommendation to avoid staying in the canyons near the volcano, because there is the probability of presence of pyroclastic flows.
As preventive measures, information from municipal civil protection units in areas near the volcano will be strengthened in order to socialize the recent volcanic activity, in addition to information meetings with the heads of neighboring schools around the volcano.

It should be noted that the likelihood of falling ash in the state persists, so the recommendations are that people cover their nose and mouth, close doors and windows, cover deposits that store water, Pick up the ashes and put them in a bag; Those with respiratory problems stay home; Avoid driving and, if necessary, do so with the lights on.

Source : Colimanoticias

Photo : Merveilleuse d’ Hernando Alonso Rivera Cervantes

 

Bogoslof ,Aleutians Islands , Alaska :

53°55’38 » N 168°2’4″ W,
Summit Elevation 492 ft (150 m)

Current volcanic alert level: ATTENTION
Previous Volcanic Alert Level: WARNING
Current aviation color code: ORANGE
Previous Aviation Color Code: RED

Issued on: Thursday 19 January 2017 at 12 h 48
Source: Alaska Volcano Observatory
Notice number: 2017 / A40
Location: N 53 deg 55 min W 168 deg 2 min
Elevation: 492 ft (150 m)
Region: Aleutians

 

No further ash emissions have occurred at Bogoslof Volcano since the explosion on Wednesday, 18 January at 13:20 AKST (22:20 UTC) and seismicity remains low. We are therefore lowering the Aviation Color Code to ORANGE and the Alert Level to WATCH. Additional ash-producing eruptions could occur at any time, however, with no detectable precursors.

Volcanic unrest continues at Bogoslof volcano. No new ash emissions have been observed since the 13:20 AKST 18 January (22:20 UTC) eruption and seismicity remains low, so the color code was lowered to ORANGE.

Following an approximately 20-minute-long increase in seismic activity, Bogoslof erupted yesterday afternoon at about 13:20 AKST 18 January (22:20 UTC). Pilots reported the cloud reached a height greater than 31,000 ft asl., and prevailing winds carried it northeast over the Bering Sea. This eruption also produced lightning strikes, and infrasound signals detected by sensors in Sand Point and Dillingham.

 

A satellite image from 13:26 AKST 18 January (22:26 UTC), just after this event, showed a dark ash cloud just northeast of Bogoslof. This cloud was darker in color, and presumably more ash-rich, than others we have seen in the eruptive sequence, which began in mid-December 2016. This image also suggests the presence of very hot material (lava) at the surface immediately surrounding the vent – the first such observation during this eruption sequence. This is also the first eruption since the 31 December 2016 event to produce detectable SO2 in satellite data.

 

Following the initial explosive eruption, a second, lower-level volcanic cloud is visible in satellite images around 14:00 AKST (23:00 UTC), likely corresponding with an increase in seismic tremor that occurred from 13:40-13:55 AKST (22:40-22:55 UTC). This event was also detected on distant infrasound sensors but did not produce reported lightning. Seismicity remained elevated until 15:45 AKST (00:45 19 January UTC), but no additional eruption clouds have been observed.

Bogoslof volcano is currently quiet, but given the pattern of eruptive activity over the past month the volcano likely remains in a restless and unpredictable condition and additional eruptive bursts accompanied by volcanic clouds could occur at any time.

Source : AVO

Photo : FAA Dutch NDB- West, Angeli, Kim.

 

Nevados de Chillan , Chile :

1295 seismic events, of which 31 were related to rigid material fracturing processes, called volcano-tectonic (VT) earthquakes with a maximum local magnitude of 1.7 ML, associated with an event located 0.7 km west of the active crater, has a depth of 4.5 km were recorded. Also during this period, 1264 long period earthquakes, related to the dynamics of the fluids inside the volcano were recorded. The strongest recorded earthquake had a local magnitude of M2.9 and a reduced displacement of 132 cm2, located in the active crater less than 1 km deep.

Since January 5, and at the issuance of this report were mainly recordings of continuing explosions and associated fluid events (LP and TR, tremor recorded the most energetic on January 15 at 12:48 (local time) , With a reduced displacement (DRC) of 68 cm 2. The intensity of the acoustic signals generated by these explosions was higher than those recorded in previous months at similar levels of seismic power.
According to data obtained from five (5) GNSS stations monitoring the deformation of the volcanic complex, trends observed in recent months remain, with horizontal displacement rates not exceeding 0.14 cm / month. On the other hand, the data provided by the two (2) inclinometers indicate significant variations related to the deformation of the volcano.
The DOAS (differential optical absorption) team at Chilian Station located 3 km east-north-east (ENE) of the active crater has no registration data this month.
No anomalies have been reported in sulfur dioxide (S02) emissions to the atmosphere in the next sector of the volcano, according to data from the ozone monitoring instrument (IMO) Sulfur dioxide ( Http: //so2.gsfc.nasa .gov /).
No thermal alerts were reported in the area associated with the volcano according to data published by Middle InfraRed Observation of Volcanic Activity (Mirova) on its website (http://www.mirovaweb.it/).

 The pulsatile nature of the activity, with periods of higher intensity alternating with lulls, suggests that, although the volcanic system in the complex continues with unstable behavior, activity remains within the range exposed during the last month. In this context, there is the probability of new phreatic phases of explosive type and / or a greater phreatomagmatic intensity of the craters currently active. Therefore, it is recommended to limit access to this area and the volcanic alert remains at the YELLOW level: changes in volcanic activity behavior.

Source : Sernageomin

Photos : Archives

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