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San Pedro

Photo of this volcano
  • Guatemala
  • México and Central America
  • Stratovolcano
  • Pleistocene
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 14.656°N
  • 91.267°W

  • 3020 m
    9908 ft

  • 342810
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for San Pedro.

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

The Global Volcanism Program has no Bulletin Reports available for San Pedro.

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

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

Deformation History

There is no Deformation History data available for San Pedro.

Emission History

There is no Emissions History data available for San Pedro.

Photo Gallery

Three major post-caldera stratovolcanoes fill the southern half of Atitlán caldera in this view from the NE. Atitlán caldera was formed during three major explosive eruptions from the Miocene to late Pleistocene. Conical Atitlán volcano (upper left) was constructed above the southern rim of the youngest caldera, Atitlán III, whose low southern rim is visible on the center horizon beyond narrow Santiago bay. Tolimán (right of Atitlán) and San Pedro (upper right) overlie the rim of Atitlán II. The buried rim of Atitlán I lies below the shoreline of Tolimán.

Photo by Bill Rose, 1980 (Michigan Technological University).
Volcán San Pedro (upper right) is the oldest of three stratovolcanoes constructed within Atitlán caldera. The furrowed slopes of the volcano contrast with the less dissected flanks of the twin Atitlán and Tolimán volcanoes. Cerro de Oro, the small lava dome just beyond the shore of Lake Atitlán at the left, is a flank lava dome of Tolimán volcano. Youthful lava flows from Tolimán descend into the lake and form part of its southern shore in this view from the west.

Photo by Bill Rose, 1978 (Michigan Technological University).
The rounded peak in the foreground is the southernmost of the twin summit peaks of Tolimán volcano. The older post-caldera volcano of Atitlán caldera, San Pedro, lies across Santiago Bay at the right. On the center horizon are the peaks of Santo Tomás (left) and Santa María (right). Tajumulco volcano, Central America's highest, is the peak on the far right horizon. The Guatemalan volcanic front rises more than 3500 m above the hazy Pacific coastal plain at the upper left.

Photo by Bill Rose, 1980 (Michigan Technological University).
The linear Santiago Bay in Lake Atitlán is the result of encroachment by the flanks of three post-caldera volcanoes into Lake Atitlán. The narrow channel extends about 8 km to the low southern caldera wall on the center horizon and is about 1 km wide. At the right are the slopes of San Pedro, the oldest of the post-caldera stratovolcanoes. Contrasting eruptive styles produced the irregular shoreline in the left foreground consisting of lava flows from Tolimán and the smoother shoreline at the far left, formed by pyroclastic deposits from Atitlán volcano.

Photo by Bill Rose, 1980 (Michigan Technological University).
Volcán San Pedro (center) occupies the SW corner of the roughly 85,000-year-old Atitlán III caldera. San Pedro is seen here across narrow Santiago Bay from the lower slopes of Atitlán and Tolimán volcanoes. The 3020-m-high San Pedro has a shallow summit crater that is breached to the NW. The age of the most recent activity of San Pedro is unknown, although the volcano is more vegetated and erosionally modified than the twin volcanoes of Tolimán and Atitlán and is clearly the oldest of the three post-caldera volcanoes.

Photo by Bill Rose, 1980 (Michigan Technological University).
GVP Map Holdings

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. The maps database originated over 30 years ago, but was only recently updated and connected to our main database. We welcome users to tell us if they see incorrect information or other problems with the maps; please use the Contact GVP link at the bottom of the page to send us email.

Title: Carta Geolica de la Republica Mexicana
Publisher: Recursos Minerales and Institute de Gelogia
Country: Mexico
Year: 1992
Map Type: Geology
Scale: 1:2,000,000
Map of Carta Geolica de la Republica Mexicana

Title: Bath of Gulf of Mexico & Caribbean Sea
Publisher: AAPG, Williams & Heintz Map Corp.
Country: US/ C.Am/ S.Am
Year: 1984
Map Type: Bathymetric
Scale: 1:3,289
Map of Bath of Gulf of Mexico & Caribbean Sea

Title: Belize, El Salvador, Guatemala, Honduras, Mexico
Publisher: DMA Aerospace Center
Country: NW C Am (GU ES HO)
Year: 1982
Series: TPC
Map Type: Topographic
Scale: 1:500,000
Map of Belize, El Salvador, Guatemala, Honduras, Mexico
Smithsonian Sample Collections Database

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

External Sites