Bob
11th May 2014, 16:40
Seismic Activity Near the Chiles volcanoes magmatic in origin likely - Mount Black, microswarms, swarms, harmonic tremor appearing.. at the border between Ecuador and Colombia.
ALERT NOTICE
This report has been prepared in coordination with the Volcanological and Seismological Observatory of Pasto (OVSP) Geological Survey of Colombia, and refers to the seismic activity in the area of Black and Chiles Cerro volcanoes along the border between Ecuador and Colombia , which are classified as potentially active volcanoes.
The seismic swarm recently recorded in this area, has since mid-February 2014 continued.
It is manifesting a high number of earthquakes. In the seismic monitoring station OVSP have posted about 9,000 earthquakes between 29 April and 5 May 2014, most associated with rock fracturing (volcano-tectonic VTs activity).
In CHL2 seismic station located in the south-eastern and a member Chiles flank Geophysical Institute 1309 events have been recorded between 1 and 6 May.
Some of these events (at least 13) have low frequencies so they can be classified as earthquakes Long Period (LP) and Very Long Period (VLP by the acronym in English).
LP and VLP earthquakes are usually associated with activity within active or potentially active volcanoes.
The greatest earthquake recorded so far has a magnitude of 4.8 and occurred on 30 April at 00h43 (local time).
This earthquake was felt in Tufiño, Johannesburg, The Angel Ibarra, Cotacachi and towns in Colombia as the population of Chiles.
In addition to this event, another 13 earthquakes were reported felt in nearby towns in the last week.
Other significant earthquakes occurred on 30 April at 00h47 with magnitude 3.3, the same April 30 at 03h58 with magnitude 3.1 and magnitude 3.2 20h22; later on 1 May at 03h01 with magnitude 3.3 and 4 May at 00h50 at magnitude 3.1.
The earthquakes are located on the southern flank of the volcano Chiles with depths less than 13 km, that is relatively close to the surface areas.
The spatial distribution of seismic sources shows no alignment with any tectonic fault zone and the occurrence of LP and VLP earthquakes, suggests that its origin is volcanic.
Today, Geophysical Institute officials traveled to the area of the Cerro Black Chiles and volcanoes to install additional seismic station and a sensor terrain deformation or swelling in this area.
report from the Geophysical Institute - http://www.igepn.edu.ec/
Colombia's Geological Institute also issued this warning:
http://quakesos.sosearthquakesvz.netdna-cdn.com/wp-content/uploads/2013/05/Screen-Shot-2014-05-07-at-17.37.03.png
Some images
http://upload.wikimedia.org/wikipedia/commons/2/24/Nevado_Chiles_465.JPG
http://upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Colombia_relief_location_map.jpg/250px-Colombia_relief_location_map.jpg
The volcano has not erupted for around 160,000 years. This is a concern to scientists monitoring this volcano.
There have been radical shifts appearing since the Chilean 8.2 quake of April 1, 2014 in the region.
Historical and background:
The Chiles is a Stratovolcano in the Snowy Pastures knot in the western Andean cordillera in Colombia , and along with the volcano Cerro Black Mayasquer constitute part of the border between Colombia and Ecuador.
Is located in the vicinity of the Police Inspectorate of Chiles, Township Cumbal , Colombia, 86 km SW of the city of Pasto , Colombia, 24 km west of the city of Tulcán , Ecuador, and 608 km SW of Santa Fe de Bogotá.
It is a volcano that is part of the volcanic complex Chiles-Cerro Black. It covers an area of 7,351 square meters of the strip that integrates volcanic corridor next to Cumbal and Azufral.
Features
The Chiles volcano is a volcano-type layer active, dominantly effusive with evidence of highly explosive stages. Its crater has 1 km in diameter. The Chiles activity is not constant but keeps snow glaciers on the flanks and within the caldera.
Age : In the absence of radiometric dates, you can assign a relative Quaternary age.
Historical Activity : Historical investigations conclude that there are no historical records of eruptive activity of these volcanoes.
Current Activity : The current activity of this volcanic complex is manifested in the presence of thermal and solfataras sources. On the Ecuadorian side of Chiles is a seismological station registered activity every few years. Between November 2013 and May 2014 around the volcanic complex suffered numerous earthquakes of very long period volcanic character. (See Ecuador Geophysical Institute report above).
Hydrology : In the wasteland of three micro Chiles born: Chiles or Gemagan, Capote or Nazate and Javita, from which they derive water tributaries among which are John Chiles, La Calera, El Barro, El Hondon and La Ceja, sources Guáitara river.
ALERT NOTICE
This report has been prepared in coordination with the Volcanological and Seismological Observatory of Pasto (OVSP) Geological Survey of Colombia, and refers to the seismic activity in the area of Black and Chiles Cerro volcanoes along the border between Ecuador and Colombia , which are classified as potentially active volcanoes.
The seismic swarm recently recorded in this area, has since mid-February 2014 continued.
It is manifesting a high number of earthquakes. In the seismic monitoring station OVSP have posted about 9,000 earthquakes between 29 April and 5 May 2014, most associated with rock fracturing (volcano-tectonic VTs activity).
In CHL2 seismic station located in the south-eastern and a member Chiles flank Geophysical Institute 1309 events have been recorded between 1 and 6 May.
Some of these events (at least 13) have low frequencies so they can be classified as earthquakes Long Period (LP) and Very Long Period (VLP by the acronym in English).
LP and VLP earthquakes are usually associated with activity within active or potentially active volcanoes.
The greatest earthquake recorded so far has a magnitude of 4.8 and occurred on 30 April at 00h43 (local time).
This earthquake was felt in Tufiño, Johannesburg, The Angel Ibarra, Cotacachi and towns in Colombia as the population of Chiles.
In addition to this event, another 13 earthquakes were reported felt in nearby towns in the last week.
Other significant earthquakes occurred on 30 April at 00h47 with magnitude 3.3, the same April 30 at 03h58 with magnitude 3.1 and magnitude 3.2 20h22; later on 1 May at 03h01 with magnitude 3.3 and 4 May at 00h50 at magnitude 3.1.
The earthquakes are located on the southern flank of the volcano Chiles with depths less than 13 km, that is relatively close to the surface areas.
The spatial distribution of seismic sources shows no alignment with any tectonic fault zone and the occurrence of LP and VLP earthquakes, suggests that its origin is volcanic.
Today, Geophysical Institute officials traveled to the area of the Cerro Black Chiles and volcanoes to install additional seismic station and a sensor terrain deformation or swelling in this area.
report from the Geophysical Institute - http://www.igepn.edu.ec/
Colombia's Geological Institute also issued this warning:
http://quakesos.sosearthquakesvz.netdna-cdn.com/wp-content/uploads/2013/05/Screen-Shot-2014-05-07-at-17.37.03.png
Some images
http://upload.wikimedia.org/wikipedia/commons/2/24/Nevado_Chiles_465.JPG
http://upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Colombia_relief_location_map.jpg/250px-Colombia_relief_location_map.jpg
The volcano has not erupted for around 160,000 years. This is a concern to scientists monitoring this volcano.
There have been radical shifts appearing since the Chilean 8.2 quake of April 1, 2014 in the region.
Historical and background:
The Chiles is a Stratovolcano in the Snowy Pastures knot in the western Andean cordillera in Colombia , and along with the volcano Cerro Black Mayasquer constitute part of the border between Colombia and Ecuador.
Is located in the vicinity of the Police Inspectorate of Chiles, Township Cumbal , Colombia, 86 km SW of the city of Pasto , Colombia, 24 km west of the city of Tulcán , Ecuador, and 608 km SW of Santa Fe de Bogotá.
It is a volcano that is part of the volcanic complex Chiles-Cerro Black. It covers an area of 7,351 square meters of the strip that integrates volcanic corridor next to Cumbal and Azufral.
Features
The Chiles volcano is a volcano-type layer active, dominantly effusive with evidence of highly explosive stages. Its crater has 1 km in diameter. The Chiles activity is not constant but keeps snow glaciers on the flanks and within the caldera.
Age : In the absence of radiometric dates, you can assign a relative Quaternary age.
Historical Activity : Historical investigations conclude that there are no historical records of eruptive activity of these volcanoes.
Current Activity : The current activity of this volcanic complex is manifested in the presence of thermal and solfataras sources. On the Ecuadorian side of Chiles is a seismological station registered activity every few years. Between November 2013 and May 2014 around the volcanic complex suffered numerous earthquakes of very long period volcanic character. (See Ecuador Geophysical Institute report above).
Hydrology : In the wasteland of three micro Chiles born: Chiles or Gemagan, Capote or Nazate and Javita, from which they derive water tributaries among which are John Chiles, La Calera, El Barro, El Hondon and La Ceja, sources Guáitara river.