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San José

Photo of this volcano
  • Chile - Argentina
  • Andean Southern Volcanic Arc
  • Composite | Stratovolcano(es)
  • 1960 CE
  • Country
  • Volcanic Province
  • Landform | Volc Type
  • Last Known Eruption
  • 33.789°S
  • 69.895°W

  • 6070 m
    19915 ft

  • 357020
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number


Most Recent Bulletin Report: May 1991 (BGVN 16:05) Citation IconCite this Report

New fumarole field on upper S flank

A new fumarole field, 150 m below the rim on the S flank . . . was first observed in late February (figures 1 and 2). On 14 May, geologists from the Univ de Chile noted that the new activity was similar to that of earlier fumaroles associated with a small andesitic dome within the central crater.

Figure (see Caption) Figure 1.Sketch of view looking E at the San José complex, 14 May 1991. Vapor rises from within the crater and from the February 1991 fumarole field. Courtesy of O. González-Ferrán.
Figure (see Caption) Figure 2. Sketch map showing the summit region and craters of the San José complex, May 1991. Courtesy of O. González-Ferrán.

Although no earthquakes were detected at the volcano, an increase in seismicity was recorded by the Univ de Chile's seismic network throughout the roughly N-S fault zone that separates the Valle Central and the Cordillera Andina. Four events were recorded in February, 8 in March, 9 in April, and 14 in May, the largest (M 4.0 and M 3.5) on 8 and 11 April, respectively (figure 3).

Figure (see Caption) Figure 3. Sketch showing the location of San José and the epicenters of two large earthquakes, April 1991. Courtesy of O. González-Ferrán.

Information Contacts: O. González-Ferrán, Univ de Chile; P. Acevedo, Univ de la Frontera, Temuco.

The Global Volcanism Program has no Weekly Reports available for San José.

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.

05/1991 (BGVN 16:05) New fumarole field on upper S flank




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


May 1991 (BGVN 16:05) Citation IconCite this Report

New fumarole field on upper S flank

A new fumarole field, 150 m below the rim on the S flank . . . was first observed in late February (figures 1 and 2). On 14 May, geologists from the Univ de Chile noted that the new activity was similar to that of earlier fumaroles associated with a small andesitic dome within the central crater.

Figure (see Caption) Figure 1.Sketch of view looking E at the San José complex, 14 May 1991. Vapor rises from within the crater and from the February 1991 fumarole field. Courtesy of O. González-Ferrán.
Figure (see Caption) Figure 2. Sketch map showing the summit region and craters of the San José complex, May 1991. Courtesy of O. González-Ferrán.

Although no earthquakes were detected at the volcano, an increase in seismicity was recorded by the Univ de Chile's seismic network throughout the roughly N-S fault zone that separates the Valle Central and the Cordillera Andina. Four events were recorded in February, 8 in March, 9 in April, and 14 in May, the largest (M 4.0 and M 3.5) on 8 and 11 April, respectively (figure 3).

Figure (see Caption) Figure 3. Sketch showing the location of San José and the epicenters of two large earthquakes, April 1991. Courtesy of O. González-Ferrán.

Information Contacts: O. González-Ferrán, Univ de Chile; P. Acevedo, Univ de la Frontera, Temuco.

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.

Eruptive History

There is data available for 7 confirmed Holocene eruptive periods.

1960 Jul 2 ± 182 days Confirmed Eruption Max VEI: 2

Episode 1 | Eruption Episode
1960 Jul 2 ± 182 days - Unknown Evidence from Observations: Reported

List of 2 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
1960    - - - - VEI (Explosivity Index)

1959 Jul 2 ± 182 days Confirmed Eruption Max VEI: 2

Episode 1 | Eruption Episode
1959 Jul 2 ± 182 days - Unknown Evidence from Observations: Reported

List of 2 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
1959    - - - - VEI (Explosivity Index)

[ 1941 ] Discredited Eruption

[ 1931 ] Discredited Eruption

1895 - 1897 Confirmed Eruption Max VEI: 2

Episode 1 | Eruption Episode
1895 - 1897 Evidence from Observations: Reported

List of 2 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
1895    - - - - VEI (Explosivity Index)

1889 - 1890 Confirmed Eruption Max VEI: 2

Episode 1 | Eruption Episode
1889 - 1890 Evidence from Observations: Reported

List of 3 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Tephra
1889    - - - - VEI (Explosivity Index)

1881 Confirmed Eruption Max VEI: 2

Episode 1 | Eruption Episode
1881 - Unknown Evidence from Observations: Reported

List of 3 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Tephra
1881    - - - - VEI (Explosivity Index)

1838 Confirmed Eruption Max VEI: 1

Episode 1 | Eruption Episode
1838 - Unknown Evidence from Observations: Reported

List of 3 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash weak or small
1838    - - - - VEI (Explosivity Index)

1822 Nov 19 - 1838 Confirmed Eruption Max VEI: 2

Episode 1 | Eruption Episode
1822 Nov 19 - 1838 Evidence from Observations: Reported

List of 2 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
1822 Nov 19    - - - - VEI (Explosivity Index)
Deformation History

There is no Deformation History data available for San José.

Emission History

There is no Emissions History data available for San José.

GVP Map Holdings

Maps are not currently available due to technical issues.

The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included.

Smithsonian Sample Collections Database

There are no samples for San José in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

External Sites