World Organization of Volcanic
Observatories
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1501-08
Observatorio Vulcanológico y
Sismológico- Pasto (OVSP)
INGEOMINAS
Carrera 31 # 18-07
Parque Infantil - A.A. 1795
Pasto
Colombia
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Telephone : |
(57) (27) 314752; 313222; 312595 |
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Telefax : |
(57) (27) 31 05 14 |
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Director: |
Diego Gomez Martinez |
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Email : |
dgomez@ingeominas.gov.co, ovp@ingeomin.gov.co |
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Website : |
Director: Diego Gomez Martinez
Scientific staff:
Investigation and Monitoring of Galeras Volcano and Volcanoes in the south
Roberto A. Torres Corredor -
Coordinador de Actividades del Proyecto en la U. O. Pasto- Seismology
Anita Patricia Ponce V. - Coordinadora de Vigilancia - Seismology
Carlos Alberto Rey - Deformation
Juan Armando Carvajal - Electronics
Ricardo Raul Torres - Electronics
Catalina Morán - Geochemistry
Daniel Rodríguez - Seismology
Natalie Ortiz Guerrero - Sistemas
Carlos Andrés Laverde - Sistemas
Seismotectonics of Colombia
Diego M. Gomez Martínez -
Coordinador de Actividades del Proyecto en la U. O. Pasto- Seismology
Lourdes Narváez Medina - Deformation
Betty Silva Parra - Seismology
Adriana Ortega Estupiñán - Seismology
Roberto A. Torres Corredor - Seismology
Volcanic Risk and Hazard Assessment
Rafael Cárdenas Santacruz -
Coordinador de Actividades del Proyecto en la U. O. Pasto- Volcanic Risk
Omar Fernando Suárez - Sistemas
Support Staff
Juan Martínez C. - Chief of
Operations and Resources
Hernán Zambrano A. - Almacenista - Pagador
Paula Silvana Acosta - Technical Administrator
Pablo Chamorro C. - Sistemas
Amparo Bohórquez - Librarian
Luz Alena Chaves - Secretary to the Director (Secretaria de Direccion)
Marta Lucía Saa L.- Operaria
Julio Humberto Egas - Operario
Carlos Alberto Estrada - Operario
Byron Fernando Gámez - Operario
Jaime Mora - Operario
Alvaro Iván Ordóñez - Operario
Mario Paz Noguera - Operario
Raul Armando Puetamán - Operario
William Rosero - Operario
Ricardo Efraín Villota - Operario
Other collaborators
Edgar Abraham Cabrera Nariño
University Professor - Gravimetry
Gloria Alexandra Moncayo Nariño University Professor - Gravimetry
Gustavo Córdoba Nariño University Professor - Risk
Daniel Rodriguez Nariño University Student - Seismology
Julio Lara CESMAG student - Deformation
Observatory - Main subjects
OVSP is located in Pasto, a city with a total population of about 350.000 inhabitants, situated 9 km East from Galeras volcano. The OVSP was installed in 1989 when the volcano began the present period of activity. Actually, we are working in the following projects: Surveillance of Galeras volcano, seismo-tectonic activity around Galeras volcano, Geochemistry in volcanoes located at south of Colombia (Nariño Department), risk analysis of Galeras volcano and hazard map on Chiles and Cerro Negro volcanoes, Geology and chrono-stratigraphy in Azufral volcano. Also we give technical support to the Regional Disaster Committee.
Seismology
The seismicity at Galeras volcano is monitored by nine telemetered stations,
vertical component seismometers, natural period of 1.0 seconds (fig 1). One of
these stations (Urcunina) has 3-component seismometer.
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Station |
Latitude |
Longitude |
Altitude (m.a.s.l.) |
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CONO |
1°13.62 |
77°21.44 |
4010 |
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OLGA |
1°13.46 |
77°21.22 |
4100 |
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CRATER-2 |
1°12.46 |
77°21.54 |
4058 |
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URCUNINA |
1°13.17 |
77°20.59 |
3494 |
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CONDOR |
1°11.63 |
77°23.55 |
4000 |
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NARIÑO-2 |
1°16.16 |
77°21.99 |
2870 |
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CALABOZO |
1°12.83 |
77°25.36 |
2355 |
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PLAZUELAS |
1°15.56 |
77°16.74 |
3000 |
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PUYITO |
1°17.86 |
77°19.38 |
2370 |
In March 1996 the BGR from Germany (Bundesanstalt fuer Geowissenschften und Rohsoffe) and the OVSP installed at 1.6 km south to the active cone from Galeras (near to Cráter-2 station) a broad-band, three component seismometer station.
As a complement of the cooperation program between BGR and INGEOMINAS, this year was developed a training course "Geophysical Methods Applied to Volcano Monitoring". This event made focus in seismology, gaschemestry, thermography and electromagnetic methods. In addition, two permanent telemetred seismological stations were installed at 0.8 km east of crater and 1.5 km north-east of Cráter-2 station. Those stations are equipped with broad-band seismometer, three components.
Ground deformations
The deformation network at Galeras volcano consists of two electronic tilmeters, one electronic tilmeter portable and eight short level lines. These stations cover the northeast flank of the volcano.
Geochemistry
The geochemical monitoring at Galeras, Cumbal and Azufral volcanoes include measurements as :
· gases from soils at volcano’s edifice;
· gases from fumaroles;
· chemical components of hot springs and well.
On Galeras volcano are 21 stations for monitoring Radon-222 and CO2, emitted from soils. Actually, there is a clasification of all waters of thermal springs, locales within a radio of 8.0 km from the volcano’s craters. Monitoring of acid and permanent gases from fumaroles is carryed out using correlation spectrometry and gas-cromatography methods.
Information updated June 2000
Contact information updated Sept 2004
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