April 09 , 2016. EN . Bárðarbunga , Fuego , Ticsani , Popocatepetl .
April 09 , 2016.
Bárðarbunga, Iceland :
An earthquake of magnitude 4.2 hit the Bárðarbunga volcano – under the famous Vatnajökull glacier in Iceland – just after midnight last night.
This is the largest earthquake hitting the region since the last volcanic eruption of Bárðarbunga that ended in February 2015.
The earthquake was followed by a dozen of aftershocks, the largest measured M 3.5 and occurred at 1:01.
There are no signs of magma movements or volcanic activity. Tremors last night are considered likely to be related to movements in circular cracks in the caldera of Bárðarbunga.
Sources : icelandmonitor.mbl.is ,
Photo : Rax / Ragnar Axelsson
Fuego , Guatemala :
Special Report Volcanological
Guatemala, April 7, 2016, 13 25 pm (local time)
Morphology: composite Stratovolcano
Geographical location: 14 ° 28 ‘54 « North Latitude, 90 ° 52’54 » West longitude.
As stated in the daily bulletins, the activity of Fuego volcano eruption changed his behavior, generating moderate to heavy explosions ejecting ash columns of 4600-4800 meters to the west and the southwest for a distance of 15 kilometers.
These explosions generate strong rumbling sound at more than 20 kilometers, accompanied by shock waves that vibrate the roofs and windows of the houses in the villages and hamlets within 12 km.
This activity of the Fuego volcano is high and is at the origin of alarm in the population near the volcano, as the reports of rumbling sounds from Santa Lucia Cotz and some municipalities of Chimaltenango department. Ash falls took place in the villages of Morelia, Panimache I and II, Sangre de Cristo and others. The activity is high with the probability of generating the sixth eruption of the year in the coming days or weeks.
The INSIVUMEH recommends:
Stay aware of the evolution of the activity of Fuego volcano.
At Directorate General of Civil Aviation:
It is recommended to take precautions with air traffic in the area of the Fuego volcano because the ashes are scattered over more than 15 kilometers to the southwest and on the West flanks of the volcanic complex.
Source : Insivumeh
Photo : Marlonardon
Ticsani , Peru :
In the recent history , strong earthquakes struck near the volcano. On 17 May 1999 and 1 October 2005 have been produced earthquakes of magnitude M 4.1 and M 5.3, respectively, which caused severe damage in the villages of Calacoa, Cuchumbaya and Carumas, among others.
– Since September 2015, an increase of seismicity near the volcano Ticsani is observed.
The 10 and 14 February 2016, two earthquakes were recorded at less than 4 km from the crater. The first of M 3.2, hybrid type, and the second, of M 3.8 , type breaking of rocks.
Between March 30 and April 4, 2016, earthquake swarms have occurred and have been located in the same area, showing a concentration in two groups:
The first group is located near the crater, while the second seismic focus is located 5 km east of the massif. This seismic activity occurred between 4 km and 11 km deep.
On March 30 was registered an earthquake swarm, three of them had magnitudes of M 3.0 , M 4.0 and M 3.7 and depths between 5 km and 7 km.
– Between 18 November 2015 and 2 April 2016, there were two measures of flow of volcanic gases SO2, with a coherent baseline of about 20 tons / day (during the eruption of the volcano Ubinas, from 2013 to 2016, the measure reached a maximum of 7600 tonnes / day).
During the same period, the temperature measured at 30 cm depth of the volcano has remained close to 45 ° C; however, between 06 and 24 February there was recorded variations between 45.9 and 22.5 ° C. These variations could be related to the increase of seismicity in this region.
– Also during 2016, there were two geodetic measurements on Ticsani volcano using a technique called electronic distance measurement (EDM), without having detected no distortion.
Summary of surveillance:
Since September 2015, an increase in seismicity near the volcano Ticsani is observed.
In recent weeks, it was recorded sporadic seismic swarms and earthquake hybrid type .
However, no increase was observed in the flow of gas, soil temperature, soil deformation, or in the vicinity of the volcano which can be associated with volcanic processes.
Given that the seismicity increased since September 2015, and that this activity occurred with similar characteristics to that of 1999 and 2005, we believe there is great probability that the scenario of a large number of earthquake happen again.
Both institutions have modern equipment deployed for monitoring Ticsani volcano, and if signs are observed indicating imminent eruptive activity, the respective warning will be issued as soon as possible.
Source : Ingemmet / OVS
Photo : Blog perouvolcans , Mapio .
Popocatepetl , Mexico :
April 08, 11:00 h (April 08, 16:00 GMT)
In the last 24 hours the seismic records of the surveillance system at Popocatépetl volcano registered 189 low-intensity exhalations, and three explosions; one yesterday at 20h26 and two at 05h44 and 09h47 today. Additionally were recorded 22 minutes of harmonic tremor.
Along the night was observed slight incandescence, increasing when main exhalations .
From dawn and up to the time of this report it has been noticed a faint emission of steam and gas that wind carried to the northeast .
Last april 2 was held with the support of the Federal Police, an overflight of the crater of the Popocatepetl volcano recognition . It was observed that destroyed the lava dome last January was formed and reached an estimated volume of 2,000,000 cubic meters . Instead it has become an inner crater 325 meters in diameter and about 50 meters deep . On the east wall of the inner crater was observed that small landslides have occurred into the same, leaving the debris background. various fumaroles were also observed in the north, south and east sectors.
CENAPRED emphasizes that people SHOULD NOT go near the volcano, especially near the crater, due to the hazard caused by ballistic fragments .
This type of activity is included within the scenarios Volcanic Traffic Light Yellow Phase 2.
Source : Cenapred .
Photo : Fabian GR