Platanar

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 10.3°N
  • 84.366°W

  • 2267 m
    7436 ft

  • 345034
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Bulletin Report: March 1997 (BGVN 22:03) Citation IconCite this Report


Dormancy continues but S-flank residents felt six earthquakes on 30 March

On 30 March 1997 residents in the S-flank settlement of San Vicente felt about six earthquakes between 0900 and 2100. One of these earthquakes took place at 1429; it was M 2.7 and its epicenter was 5 km SE of the volcano. No residents in other nearby settlements (Porvenir, Sucre, and Quesada) reported feeling these earthquakes.

About 10 days after the earthquakes, two dry-tiltmeters, measured every 2-3 years, showed differing results. One showed great changes but had been disturbed; the other, which was considered more reliable, had changed little. An April 1980 seismic swarm near Platanar, attributed to a local fault, continued for 2-3 weeks.

Information Contacts: E. Fernández, E. Duarte, V. Barboza, R. Van der Laat, E. Hernandez, M. Martinez, and R. Sáenz, Observatorio Vulcanológico y Sismológico de Costa Rica, Universidad Nacional (OVSICORI-UNA), Apartado 86, 3000 Heredia, Costa Rica.

The Global Volcanism Program has no Weekly Reports available for Platanar.

Bulletin Reports - Index


Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.

06/1969 (CSLP 44-69) Increased fumarolic activity and rumblings reported

01/1993 (BGVN 18:01) No significant deformation since 1987

01/1994 (BGVN 19:01) Seven years of dry-tilt measurements show no change

03/1997 (BGVN 22:03) Dormancy continues but S-flank residents felt six earthquakes on 30 March




Information is preliminary and subject to change. All times are local (unless otherwise noted)


June 1969 (CSLP 44-69)


Increased fumarolic activity and rumblings reported

Card 0568 (04 June 1969) Increased fumarolic activity and rumblings reported

The following is from a cable received on 3 June. "New or increased fumarolic activity together with earth rumblings reported by municipal authorities at Cerro Platanar . . . . Although close to Quesada immediate area of volcano extremely inaccessible. Such activity appears to be unusual."

Information Contacts: Richard Berg, American Embassy, San José, Costa Rica


January 1993 (BGVN 18:01) Citation IconCite this Report


No significant deformation since 1987

Dry-tilt data have shown no significant changes since 1987.

Information Contacts: E. Fernández, J. Barquero, R. Van der Laat, F. de Obadía, T. Marino, and R. Sáenz, OVSICORI; M. Martini, Univ di Firenze, Italy.


January 1994 (BGVN 19:01) Citation IconCite this Report


Seven years of dry-tilt measurements show no change

OVSICORI reported in January 1994 that two dry-tilt inclinometers installed in 1987 have thus far showed insignificant changes.

Information Contacts: E. Fernández, J. Barquero, R. Van der Laat, F. de Obaldia, T. Marino, V. Barboza, and R. Sáenz, OVSICORI.


March 1997 (BGVN 22:03) Citation IconCite this Report


Dormancy continues but S-flank residents felt six earthquakes on 30 March

On 30 March 1997 residents in the S-flank settlement of San Vicente felt about six earthquakes between 0900 and 2100. One of these earthquakes took place at 1429; it was M 2.7 and its epicenter was 5 km SE of the volcano. No residents in other nearby settlements (Porvenir, Sucre, and Quesada) reported feeling these earthquakes.

About 10 days after the earthquakes, two dry-tiltmeters, measured every 2-3 years, showed differing results. One showed great changes but had been disturbed; the other, which was considered more reliable, had changed little. An April 1980 seismic swarm near Platanar, attributed to a local fault, continued for 2-3 weeks.

Information Contacts: E. Fernández, E. Duarte, V. Barboza, R. Van der Laat, E. Hernandez, M. Martinez, and R. Sáenz, Observatorio Vulcanológico y Sismológico de Costa Rica, Universidad Nacional (OVSICORI-UNA), Apartado 86, 3000 Heredia, Costa Rica.

The Global Volcanism Program is not aware of any Holocene eruptions from Platanar. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Platanar page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.

Photo Gallery


The Platanar volcanic complex on the horizon is the NW-most volcano in the Cordillera Central of Costa Rica. The massive complex consists of two largely Pleistocene stratovolcanoes, Platanar and Porvenir, which grew within the Chocosuela caldera. The highest peak of the complex is 2267-m-high Porvenir volcano, whose summit crater contains a small cone. This view is from the east with the Bosque Alegre (Laguna Hule) maar, located on the lower northern flank of Poás volcano, in the foreground.

Photo by Mike Carr, 1983 (Rutgers University).
See title for photo information.
Platanar volcano, located NW of the more well-known Poás volcano, is part of the Juan Castro Blanco National Park. Volcán Platanar and Volcán Porvenir were constructed along a N-S line in the western part of the park within Chocosuela caldera, which formed as a result of major explosive eruptions during the late Pleistocene.

Photo by Guillermo Alvarado (Instituto Costarricense de Electricidad).
See title for photo information.
The Aguas Zarcas group of nine basaltic cinder cones, located on the far northern flank of the Platanar-Porvenir complex to as low as 160 m altitude, is in part Holocene in age. These cones lie 10-17 km behind the volcanic front of Costa Rica at a point 125 km above the Wadati-Benioff zone. The pyroclastic cones were constructed along two parallel fractures striking NNW.

Photo by Paul Kimberly, 1998 (Smithsonian Institution).
See title for photo information.
The summit crater of 2183-m-high Platanar volcano lies in the shadow at the upper right in this aerial view from the south. Prehistorical lava flows are found on the western flank of Platanar. The forested slopes of Platanar and Porvenir volcano to the south are habitat to abundant wildlife, including jaguars, foxes, pacas, and red- and white-faced monkeys, as well as exotic bird species and tropical snakes. Tropical trees abound, including the cabbage palm, from which a local delicacy, the heart of palm, is extracted.

Photo by Federico Chavarria Kopper, 2004.
See title for photo information.
Volcán Platanar rises above farmlands north of the volcano. The summit of Platanar, which is also known as Cerro Congo, after the howler monkeys occupying its slopes, reaches 2183 m. This stratovolcano lies about 8 km SE of the city of Quesada at the northern end of the Palmira-Chocosuela-Platanar volcanic complex. Young lava flows are located in the Finca Pradera area on its western flank.

Photo by Eliecer Duarte (OVSICORI-UNA).
See title for photo information.
The Viejo-Porvenir complex is seen here rising above farmlands NE of the massif. The 2122-m-high Volcan Viejo is on the left and 2267-m-high Porvenir on the right. Volcán Viejo is not actually a volcano, but lies along the rim of the Chocosuela caldera and the Río Segundo erosional caldera. El Viejo is noted for an area of sulfur deposits and fumarolic activity that was prominent until about 1960, after which it decreased and stopped by 1975. Porvenir is a small stratovolcano with a summit crater containing a pyroclastic cone.

Photo by Eliecer Duarte (OVSICORI-UNA).
See title for photo information.

Smithsonian Sample Collections Database


The following 34 samples associated with this volcano can be found in the Smithsonian's NMNH Department of Mineral Sciences collections. Catalog number links will open a window with more information.

Catalog Number Sample Description
NMNH 116066-399 Tephra
NMNH 116066-400 Soil
NMNH 116066-401 Tephra
NMNH 116066-402 Soil
NMNH 116066-403 Tephra
NMNH 116066-404 Soil
NMNH 116066-405 Tephra
NMNH 116066-406 Soil
NMNH 116066-408 Augite-hypersthene andesite
NMNH 116066-409 Soil
NMNH 116066-410 Tephra
NMNH 116066-411 Tephra
NMNH 116066-412 Tephra
NMNH 116066-413 Tephra
NMNH 116066-414 Tephra
NMNH 116066-415 Sand
NMNH 116066-416 Soil
NMNH 116066-467 Tephra
NMNH 116066-468 Tephra
NMNH 116066-469 Tephra
NMNH 116066-470 Tephra
NMNH 116066-471 Tephra
NMNH 116066-472 Tephra
NMNH 116066-473 Tephra
NMNH 116066-474 Tephra
NMNH 116066-475 Tephra
NMNH 116066-476 Tephra
NMNH 116066-477 Altered volcanic rock
NMNH 116066-478 Volcanic
NMNH 116066-479 Tephra
NMNH 116066-480 Tephra
NMNH 116066-481 Tephra
NMNH 116066-482 Tephra
NMNH 116066-483 Tephra

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